b) What is the simple machine? mention some of its applications?
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Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities. Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever.
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A machine is a device by which a small applied force can be multiplied to overcome a large resistive force or by which a gain of speed can be obtained. Some common applications of simple machines include lifting heavy loads by ack or pulley, riding a bicycle or cutting with a pair of scissors.
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