Fixed Pulley Examples Everyday Life

Lesson Plans are a general outline of assignments and activities. A rope looped through a pulley attached to a fixed spot, e. The glossary is mainly to documente terms from the golden age of the hobo, from the 1880's until World War One, and you may find some contemporary hobo, railroad and homeless terms as well. We chose these three areas in. SRAM GX Drivetrain - Review. So, first set up the track - shown by the yellow line in the illustration. Pulleys & Gears : Links. Worm Gears Spur Gears We can find spur gears in music boxes. com - id: 263186-ZDc1Z. These simple machines function to make doing work easier. Weekly Schedule: It’s 2 total weight training workouts per week (both of which are full body) ideally done with 2-4 days off in between each workout. An example of a fixed pulley is the one located at a flagpole in order to raise a flag. Without it, you wouldn't know how far away a wall was from you or the distance from your car to the car in front of you. Load-free starting. ppt Lever, Gear or Pulley Sheet. For example, a system consisting of a fixed pulley and a movable pulley would reduce the workload by a factor of two, because the two pulleys. Capital budgeting is the whole process of analyzing projects and deciding whether they should be included in the capital budget. 3 examples of places where gear systems are used in everyday life. Wheels and axles are used to carry loads around easily, for long distances with very less effort. When he's finished reading, help him brainstorm some examples of pulleys that we use in everyday life!. With immense impact on our daily life, this simple yet useful machine has revolutionized our style of working. There are three main types of pulleys: fixed, movable, and compound. In my examples, one block is fixed at the top and the other block moves up with the load. With a compound pulley, you can lift an object using half the force it takes to lift the same object with a simple pulley. In a first-class lever, the fulcrum is always between the input and the output. 4) Improper lubrication. Man has always been aware of the fact that some things, such as fire, are very hot, and other things, like ice and snow, are very cold. Fixed pulleys are common in everyday life. They are found in everything. As such, the field of mechanical engineering touches virtually every aspect of modern life, including the human body, a highly complex machine. pg 621 Compare the effects of a fixed pulley and a movable pulley on. Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities. Children's curiosity provides a natural starting point for learning. Pulley Facts for Kids. It has an MA = 1 (assuming frictionless bearings in the pulley), meaning no mechanical advantage (or disadvantage) however advantageous the change in direction may be. That is, the axle is "fixed" or anchored in place. block and tackle pulley eunique02 3 examples of crystalline substances in everyday life? salt, sugar and ice. The central nervous system (CNS) utilizes anticipatory (APAs) and compensatory (CPAs) postural adjustments to maintain equilibrium while standing. An example of a single, fixed pulley is the flagpole pulley. A pulley is a simple machine designed to increase lift strength using a tracked wheel and a cord, rope or chain. There are three main types of pulleys: fixed, movable, and compound. A Pair of Forceps Pulley: A pulley consists of a wheel mounted on an axle that is fixed to the framework called the block. A pulley is a type a wheel with a groove. It is also called as ramp. there are a lot of places pulleys are used. Wheels and Levers 43 Figure 3. These are shown below. The plans may be a day behind if I feel that the students need additional instruction or are in need of reteaching for a particular concept that they are learning. Toothed gear systems have evolved from fixed axis gear systems to new and improved gears including helical, cycloid, spur, worm and planetary gear systems. screw lid jar. Pulleys are simple machines that make lifting heavy objects easier. The groove helps heep the rope or chain in place. Using multiple examples of engine builds and case studies The Chevrolet Small-Block Bible provides the reader with the information needed to build anything for a mild street engine for use in a custom or daily driver to a cost-is-no-object dream build. Can you think of any structures which impact on your everyday life?. A fixed pulley has a mechanical advantage of one. Examples of other jobs that would typically be considered manual handling or manufacturing jobs, and examples of those that would not be so classified, can be found in proposed section 1910. everyone should own one of this mower. These goals must be precise enough to delimit the desired behavior of the detector while making minimal assumptions about the form of the solution. Find answers to frequently asked questions about home delivery, Click + Collect, the B&Q Club and more as well as contact details if you'd like to speak to our customer support team. Using the information the class came up with about simple machines; the students will be asked to work together and use their prediction skills to predict why simple machines are used and some examples of how they are used in everyday life. Torque with Examples. If something moves in a manner more complicated than a straight line, chances are there's some good physics involved. A fixed pulley is used to redirect the force in a rope (called a belt when it goes in a full circle. What are the forces ( FA, F B) holding the bridge up at either end?. 6× 10^3, both two-component particle image velocimetry (PIV) and single-component hot-wire anemometer measurements are taken at the horizontal mid-plane in the wake of each turbine. If not treated properly, serious finger injuries can lead to permanent deformity and loss of function. There are three types of pulleys : Fixed pulley, which does not change the amount of force applied or the direction of force, The Movable pulley, which decreases the amount of input force needed but does not change the direction of the force, and Block and Tackle, a system made up of fixed and movable pulleys. )on top of a pulley holder or something like that {lol}. The topics covered in this website will show examples of this. The first type is a fixed pulley which changes the direction of the input force. You have joined No matter what your level. Examples of Different Types of Pulley Systems. Example of a Machine. A fixed pulley is a simple machine that uses a wheel with a groove in it and a rope that fits into the groove. Examples of tasks made easier include lifting a heavy weight, moving a heavy object over a distance, pushing things apart, changing the direction of a force, or holding an object together. Easier - A simple machine is a device that helps make work easier; a device that makes it easier to move something. Examples of tasks made easier include lifting a heavy weight, moving a heavy object over a distance, pushing things apart, changing the direction of a force, or holding an object together. The emphasis here is to show how we try to clarify the situation presented in the problem (often with a picture), to show what principles and equations from the chapter are applicable to the situation, and finally to show how to use those equation to solve for the desired quantities. is one example of a mechanism. Structures come in countless shapes and sizes, each one with its own unique and specific function. A practical example of this is the brake mechanism on a bicycle. We offer lifts and slings so you can transfer your patient safely and efficiently. An example of a fixed pulley is the one located at a flagpole in order to raise a flag. 3) Belts too tight and/or too loose. It is designed to make the effort less than half the weight of a load. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, 20 places where pulleys are used in everyday life, quarry, aggregate, and different kinds of minerals. - get free, high quality pulley examples on RR Of pulleys in everyday life physics help example a. What are the forces ( FA, F B) holding the bridge up at either end?. 3 examples of places where pulley systems are used in everyday life. A rope fits in the groove. Their are various ways by means of which, we can increase or decrease friction. An example of a single, fixed pulley is the flagpole pulley. It works in conjunction with the disk and scroll, the cones, or the expanding pulley, to impart an intermittingly variable speed to the bobbin (each layer of the bobbin has its own particular speed which is constant for the full traverse, but each change of direction of the builder is accompanied by a quick change of speed to the bobbin). There are two types of pulleys - a single, fixed pulley and a multiple pulley. ppt Lever, Gear or Pulley Sheet. The mass of an object is a property of the object itself, which reflects its resistance to being accelerated. There are three classes of lever and each class has fulcrum, load and effort which together can move a heavy weight. Movable pulleys attach to objects. With immense impact on our daily life, this simple yet useful machine has revolutionized our style of working. There are three types of levers: first class, second class, and third class. Pulley is a simple machine and comprises of a wheel on a fixed axle, with a groove along the edges to guide a rope or cable. These useful devices are applied often in modern-day machinery, with numerous examples of pulleys found in your community. The multiple pulley system is able to multiply the strength and pulling power of the winch, lowering the strain on the winch and the object being pulled. com - id: 263186-ZDc1Z. Sun Cottage Books. At the other end , the output force pulls up on the object you want to move. Dec 9, 2015 Obviously it's going to have alot to do with how many examples of each drivetrain you see, as a mechanic. •Humans have been improving their lives for thousands of years with technology. The effort force is equal to the resistance force in a fixed pulley. Get the latest headlines on Wall Street and international economies, money news, personal finance, the stock market indexes including Dow Jones, NASDAQ, and more. There are innumerable uses of pulleys. During the 15 years in which I have helped hundreds of personal training clients reach their full bodybuilding potential I have observed one immutable truth that will save you many hours of wasted effort in the gym: by designing your workouts around compound, multi-joint movements, and incorporating isolation exercises sparingly. Too much or not enough grease. It is designed to make the effort less than half the weight of a load. Meet the new nine. There are three types of levers: first class, second class, and third class. A simple machine uses a single applied force to do work against a single load force, often times reducing the amount of effort needed to accomplish a task. Do you know, that a scissor is an machine, a wheelbarrow is a machine. There are two ways to let wheels turn on an axle. everyday life? O Level Syllabus zunderstand and sketch simple examples of levers and linkages in use zexplain the function of a simple pulley system, the relationship between speed of rotation of pulley, diameter of pulley and velocity ratio of a pulley system zexplain simple gear ratios, transmission speeds and their effects on transmission of. Usually, two or more pulleys are used together. A practical example of this is the brake mechanism on a bicycle. We have many A-Z keywords for this term. A name used for a significant other, fuckbuddy, and/or hot guy. Customer support. Shop Staples for business essentials, printers, ink, computers, office furniture, printing services, promotional products and more. The rope is threaded through the pulleys to provide mechanical advantage that amplifies that force applied to the rope. Examples of tasks made easier include lifting a heavy weight, moving a heavy object over a distance, pushing things apart, changing the direction of a force, or holding an object together. However, the ‘feasibility’ of implementation of such programs in real settings is seldom discussed. A compound pulley system uses a fixed pulley and a movable pulley so that an operator is able to move a heavy load with less physical effort. The simplest closed-loop linkage is the four-bar linkage, which has three moving links, one fixed link and four pin joints. -New materials in everyday life. daily lives. Used in a basket hitch with the legs at a 60° angle to the load, it would have a working load limit of 866 lbs. What type of simple machine is found on the cap of a pickle jar? a. Since we have no examples of it being violated in nature, it is a useful tool for analyzing situations which are somewhat counter-intuitive. FIXED PULLEYS Always hang the pulley from the support before threading. A fixed pulley is one in which the drum is secured to a single spot. The science program of studies is built on the following principles. pg 621 Compare the effects of a fixed pulley and a movable pulley on. Pulleys are utilized regularly in oil derricks. The arms (EF and FR) in figure 2-3 are equal; hence, the mechanical advantage is 1. information fed into a data. o How should they set up their pulleys so Jan can lower the climber using as little effort. i have owned many lawn mowers over 40 years and i have to say this is the best of the best honda piece of equiptment. Try it now. First, we know that a door opens slowly if we push too close to its hinges; it is more efficient to rotate a door open if we push far from the hinges. The role of the moment of inertia is the same as the role of mass in linear motion. When a downhill bike has a custom-made, internally mounted shock that uses part of a Fox 40's stanchion tube, a hybrid damper, and a gearbox, it deserves a deeper look. Development of a Directly Self-adaptive Robot Hand with Pulley-belt Mechanism Guoxuan Li 1 , Bowen Li 1 , Jie Sun 1 , Wenzeng Zhang 1,2,# , Zhenguo Sun 1 , and Qiang Chen 1. Inclined planes. Several pulleys can be used at one time. Mechanical advantage is the measure of the amount of energy saved by using tools or mechanical devices. Fixed Pulley; When the block of the pulley is fixed on a high platform, it is known as Fixed. The Eager Lever. a force that moves an object b. They have determined that the 2. 2B, C, D, & E;6. Read, think and talk about your thoughts with a friend as you work your way through this guide. Interested in opening a new account? Discover why you should choose TD Ameritrade to help you with your investing needs. For example, 2 of these pulleys from Carolina Biological. Q&A for active researchers, academics and students of physics. Displaying images of these typical examples (e. Fixed expenses are those that stay relatively the same each month and are required parts of your way of living. The lever doesnâ t actually go up or down at the fulcrum point. In everyday life, a large number of examples upholding the law of inertia can be observed. Pulleys can also be machines consisting of a wheel over which a pulled rope or chain runs to change direction or lift a load. a barn roof rafter, and attached to the weight is called a single fixed pulley. SETTING UP PULLEYS When setting up pulleys, it is important to follow the steps in the order given in the relevant Activity to avoid the cord slipping off the pulley groove or the weights falling onto the bench and releasing the cord to slide off the pulley. Sometimes composite pulley systems to move heavy loads with minimal effort are used. Some simple machines are a wheel, a pulley, a lever, a screw, and an inclined plane. These are shown below. You can also click the link to avoid waiting. A block refers to the case that contains the pulleys side by side and also holds the axle in place. 10-The nail could not be fixed on the wood or wall if there is no friction nor a horse could not pull a car unless the friction provided a secure point of support. The normal force acts in a direction normal to the surface interaction between objects. The lever is a stiff bar that moves about a fixed point. When he's finished reading, help him brainstorm some examples of pulleys that we use in everyday life!. swivel piano stool. In General form Moment of Inertia is expressed as: I = mr 2 and, Integral form: I = ∫dI = ∫[0→M] r 2 dm ⇒ The dimensional formula of the moment of inertia is given by, M 1 L 2 T 0. This is how a conventional and simple machine like a pulley is making life easier for us. One of the most common topics covered in a high school physics class is simple machines. A rope fits in the groove. Introduction to the ways of increasing and decreasing friction: When a body slides over the surface of another body, there is an opposing force acting in opposite direction of motion and this opposing force is called friction. A zip line is an example of a moveable pulley, though both ends of the rope is attached to something, the pulley moves along the rope or metal cable. See more ideas about Product description, Furniture hinges and Geneva mechanism. > Learn more about vCalc. The Conrad-style ball bearing is named after its inventor, Robert Conrad, who was awarded British patent 12,206 in 1903 and U. For example, a system consisting of a fixed pulley and a movable pulley would reduce the workload by a factor of two, because the two pulleys. Each pulley has an oil impregnated bearing to extend pulley life. Weekly Schedule: It’s 2 total weight training workouts per week (both of which are full body) ideally done with 2-4 days off in between each workout. The pulley at the top of the pole changes the direction of the force you apply: you pull down, and the flag goes up. Learn, teach, and study with Course Hero. the other must turn. A pulley is said to be a fixed pulley if it does not rise or fall with the load being moved. Education and Training. A pulley is used to make this ladder longer. If something moves in a manner more complicated than a straight line, chances are there's some good physics involved. MECHANICAL ADVANTAGE AND SIMPLE MACHINES CONCEPT When the term machine is mentioned, most people think of complex items such as an automobile, but, in fact, a machine is any device that transmits or modifies force or torque for a specific purpose. Do they need to build a new pulley? What materials would they need? What is the projected cost? Use the planning worksheets that follow with your. Everyday examples of pulleys in use include flag poles, elevators, sails, fishing nets (see Figure 4), clothes lines, cranes, window shades and blinds, and rock climbing gear. 945, Definitions. Next it's on to pulley systems, wheels and axles, inclined planes. The design of a pinned connection is a good example of the idealization of the reality. This is how a conventional and simple machine like a pulley is making life easier for us. How do you like me now (that is what the differential equation would say in response to your shock)!. Unfortunately I'm not too clued up on what my options are. a barn roof rafter, and attached to the weight is called a single fixed pulley. A fixed pulley changes the direction of the force on a rope or belt that moves along its circumference. A cargo lift system that allows for items to be hoisted to higher floors is a pulley system. Translational and rotational laws of motion translational rotational; 1st: An object at rest tends to remain at rest and an object in motion tends to continue moving with constant velocity unless compelled by a net external force to act otherwise. Pulley A pulley consists of a grooved wheel that turns freely in a frame called a block. Moveable pulleys making lifting things easier. 3) Belts too tight and/or too loose. Double sheave design allows you to rig as a block and tackle set to reduce force needed to pull line. If you can't find one of these you can have one made (fairly involved piece of lathe work - cost around £150) or you can try and find a US-spec engine. Check your inbox for more details. The conveyor belt has 2 pulleys at the end, which spins in the same direction with the same distance apart. Bruce Yeany 326,382 views. For wedge, you can use a log splitter also. connected by a light inextensible string which may pass over a fixed smooth peg or light pulley Students develop abilities and. Sometimes composite pulley systems to move heavy loads with minimal effort are used. edu is a platform for academics to share research papers. The increase the efficiency of double movable pulley (1. FIXED PULLEY: a fixed pulley is a pulley that is attached to a stationary object (wall, ceiling, etc. Load-free starting. Therefore if the rope is run over the first fixed pulley wheel, around the free pulley, over a second pulley wheel in the fixed block, and back to the free block, the mechanical advantage is 3. A 300-lb load can be raised by a pull of 100 lb on the free end of the rope. Examples Human forearm Upper and Lower Jaws in the Mouth. Muscles and joints involve very interesting applications of statics. Read unlimited* books and audiobooks on the web, iPad, iPhone and Android. A pulley is a simple machine designed to increase lift strength using a tracked wheel and a cord, rope or chain. depends on the rotational inertia (I) of the object • The rotational inertia (I) depends on the mass of the object, its shape, and on how the mass is distributed I•Sd dk: =siiol ½M R 2 • The higher the rotation inertia, the more torque that is required to make an object spin W= mg T Torque = T ⋅R R M rotational inertia examples. Pulleys can be used to extend ladders. The purpose of this systematic review. A pulley is a wheel with a groove that holds a rope, cable or belt, and is used to help lift an object or change the direction of a force. These simple machines function to make doing work easier. )on top of a pulley holder or something like that {lol}. Some are at home, streets, or even stores. Examples of tasks made easier include lifting a heavy weight, moving a heavy object over a distance, pushing things apart, changing the direction of a force, or holding an object together. B) free body diagram of block m 2 (right of figure below). [edit] Pulleys An example of a rope and pulley system illustrating mechanical advantage. com’s courses with LinkedIn data to give you personalized learning. A FIXED PULLEY!!A fixed pulley is a pulley that has a string (or anything that has the feature for example like a shoelace string and etc. Another support must be provided at some point to prevent rotation of the structure. The topics covered in this website will show examples of this. These are the things students will need to know for the quiz. In my examples, one block is fixed at the top and the other block moves up with the load. connected by a light inextensible string which may pass over a fixed smooth peg or light pulley Students develop abilities and. The Pulleys and Force activity explores the concept of force and shows how pulleys are used in everyday life to make work easier. Well dried, lacquered, on plaque with inscription “Sometimes you spoke it, sometimes you wrote it, but mostly you were in it, so take it and go”. There's so many things going on at the same time, especially our Internet of Things hacking night where we are free to play with gadgets that impact everyday life and are often overlooked from a security perspective. The purpose of the study was. Pulleys are used to reduce the time and energy taken to lift heavy objects. we have a showroom, where a sample of our items are available to buy and order, as well as a yard and warehouse to accommodate our vast stocks. This term has been over used in past years by publishers who think that inserting a moving picture in their ebook would deem it “interactive”. Structures come in countless shapes and sizes, each one with its own unique and specific function. 4) Improper lubrication. These useful devices are applied often in modern-day machinery, with numerous examples of pulleys found in your community. Read: When several movable and fixed pulleys are used together, the entire system is usually called a block and tackle. there are a lot of places pulleys are used. levers, pulleys and gears, allow a smaller force to have a greater effect. We clip the flag to one side of the rope then pull down on the other side of the rope, raising the flag. Request PDF on ResearchGate | Solving the pulley inclusion problem for a cable-driven parallel robotic system: Extended kinematics and twin-pulley mechanism | For a cable-driven parallel robot. The triceps muscle is an extensor that opens the limb. Science Fair Project Ideas - Insulation Testing This is one of the more practical science fair project ideas since it relates to insulation, which is a common material in home construction. Examples of microscopes suitable for schools follow in order of cost 1. Here are some examples of this system that we. 255: Single fixed pulley The single fixed pulley allows the use of a downward force, the effort, E, to lift a load, L. A zip line is an example of a moveable pulley, though both ends of the rope is attached to something, the pulley moves along the rope or metal cable. Personal hygiene and care are secured and the caliber of the food is top-type. Ask a New Question. Proper tension should be maintained at all times. 88 lbs — and yet is still compatible with the vast majority of Switch titles, making it a great entry-level option. The Fixed Pulley. Exploring Pulleys (link) (6. Finger injuries are common and range from minor cuts and scrapes to wounds with major damage to bone, tendons, and ligaments. o How should they set up their pulleys so Jan can lower the climber using as little effort. An example of a fixed pulley is the one located at a flagpole in order to raise a flag. This list of words and phrases is in no sense complete. Levers Pulleys and Gears Differentiated Lesson Resource Pack contains: T2-S-374-Levers-Pulleys-and-Gears-Task-Setter-Powerpoint-Activity-Pack. Solved Examples; Moment of Inertia Formula. Is there any advantage to using a single fixed pulley? Explain. the other must turn. Come see how we're preventing injuries and saving lives at LittleGiantLadders. Modeling and Experimentation: Mass-Spring-Damper System Dynamics Prof. Examples of common pulley systems can be found on flagpoles, blinds, elevators, sailboat rigging, cranes, tow trucks. 20 places where pulleys are used in everyday life Products. A controlled variable is one which the researcher holds constant (controls) during an experiment. The use of a single fixed pulley and attached cord allows for a change in the direction of the force applied to an object. A non-contact force does not have to touch an object to cause a change. How to Build a Pulley. A pulley is a simple machine designed to increase lift strength using a tracked wheel and a cord, rope or chain. There are three main types of pulleys: fixed, movable, and compound. Three bodies in a fixed volume have a fixed total momentum, distributed in the first case evenly, (5, 5, 5), and in the second case unevenly, say, (9, 5, 1). The wheel can rotate freely in the block. " If a pulley is movable it is "attached to a load that is being lifted. pulleys, lever, and ramps). Friction is a force that opposes motion on surfaces. The human body is very sensitive to even relatively small changes in air temperature, and we can readily determine how hot or cold an object or substance is in relative terms simply by touching it. Some belt and pulley drives also have teeth. Movable A movable or class 2 pulley has a free axle. Monocular tube microscope, external illumination, magnification 40X, 100X and 400X. The movable pulleys may be hooked onto the bike and effectively alter the direction of force, allowing the user to haul the. Make your own pulley system at home. different pulley setups. They are used everywhere…. Pulleys are used in everyday life, from. How much rope do you have to pull to reduce the distance between the sticks by How hard is it to pull the rope when there are 2 loops, 4 loops, 8 loops, etc. A good example of a pulley system is an escalator. For example, in a study looking at how tutoring impacts test scores, the dependent variable would be the participants' test scores, since that is what is being measured. A movable pulley is a pulley that can freely move. For example everyday I use a pencil in school and everyday I have to sharpen that pencil. Examples in our everyday world include blinds, garage doors, and even a flagpole. A compound pulley system uses a fixed pulley and a movable pulley so that an operator is able to move a heavy load with less physical effort. We're here to help with your questions about shopping at B&Q. 1: Contact forces Figure 2. 945, Definitions. Unlike a single pulley which only changes the direction of the force, the wheel & axle can change both the direction of the force AND the magnitude of the force (mechanical advantage). Read Real Native Genius by Angela Pulley Hudson for free with a 30 day free trial. For example, when an axe strikes a log and the log splits into two halves. The other way is to have the wheels fixed to the axle and the axle turns in a bigger tube called the bearing. clothesline pulley. The power tool should be maintained in order to ensure a long, useful life and to protect the operator against electric shock or mechanical mishaps. 3 examples of places where gear systems are used in everyday life. For example, there are 900,000 elevators in the U. Vessels, bottles, and other glass containers started to be produced and utilized for both decorative and everyday use. A video with examples on Components of Vectors may be helpful. with it hanging over a pulley on one side, with a ruler reading 0cm at the clamp. The load is the person holding onto the pulley or wheel, the rope is fixed in spot, and the force is the attachment to the opposite end of the line. A Pair of Forceps Pulley: A pulley consists of a wheel mounted on an axle that is fixed to the framework called the block. This could overheat and damage them. Honors PhySci Semester Review. Uses of Pulleys. MECHANICAL ADVANTAGE AND SIMPLE MACHINES CONCEPT When the term machine is mentioned, most people think of complex items such as an automobile, but, in fact, a machine is any device that transmits or modifies force or torque for a specific purpose. pulley examples. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, 20 places where pulleys are used in everyday life, quarry, aggregate, and different kinds of minerals. Facts About Pulleys A pulley redirects and increases the force applied to a load which makes it easier to move. Anvils are typically produced from cast steel due to its impact resistance properties. EASY CAR MAKING CRAFTS FOR KIDS : Learn how to make your own handmade cars, trucks, and other vehicles - some that move propelled by balloons, mousetraps, etc. Compound Machines. The origin is not quite known but some historians believe that Mesopotamians used this simple machine to life water as long ago as 1500 BF. Examples are fixed pulley, movable pulley and Combined pulley. Many are machines we use in our everyday life, such as cars; wind up toys, clocks, mixers, bikes, oil rigs, vacuum etc. I'm slowly phasing in heavier activities. In a fixed pulley, like a flagpole, only the direction of movement is changed. The movable pulleys may be hooked onto the bike and effectively alter the direction of force, allowing the user to haul the. ABC™ corrects bones out of place that your body cannot self correct because there is no muscle or group of muscles that actually exist in the human body that can correct these malpositions.