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Answer:
a machine is a thing which made by people to make work easier
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Answer:
A machine is a thing that is created by people to make work easier. It is a tool or invention which multiplies the effect of human effort. The machine produces a mechanical advantage. Some machines have many parts that move. Examples are bicycles and clocks.
A screw is one of the most commonly used mechanical devices in the world. It is a machine that converts rotational motion into linear motion.
A pulley is a wheel with a groove along its edge, that holds a rope or cable. Usually, two or more pulleys are used together. When pulleys are used together in this way, they reduce the amount of force needed to lift a load. A crane uses pulleys to help it lift heavy loads.
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