1. WHAT IS A MECHANISM? The moving parts of a bicycle are examples of everyday mechanisms that make life easier and more enjoyable: -The chain of a bicycle transfers motion to the back wheel. - The bar of seesaw forms a lever that we can use for fun....
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1. WHAT IS A MECHANISM? The moving parts of a bicycle are examples of everyday mechanisms that make life easier and more enjoyable: -The chain of a bicycle transfers motion to the back wheel. - The bar of seesaw forms a lever that we can use for fun. -The gears inside old-fashioned clocks let us measure time. -The pulley system above a well helps us to bring up water. Although these mechanisms are quite different, they all have something in common. They make work easier because they transmit and transform force and motion. All of these mechanisms require an input force and motion from some type of source. In the case of bicycle, our leg muscles are the input source. Mechanisms transmit motion and force to receptors that finally perform the work. This is the output force and motion. In the case of an analogue clock, the output receptors are the hands of the clock that move in circles to show the time. 1.1. THE PARTS OF A MECHANISM Mechanisms transmit and transfo
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