What is a simple & complex machine?
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Simple Machines : Simple machines are machines with few or no moving parts. They make work easier, user energy to work and change the direction of force. They include lever, screw, wheel and axle, inclined plane, pulley and wedge.
Complex Machines : Complex machines can be created by combining simple machines.
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Simple Machine: Any of various devices that function in a manner basic to anymachine, such as a lever, pulley, wedge, screw, or inclined plane. Complex Machine: A device consisting of two or more simple machines working together. ... A pulley is a wheel or set of wheels that a rope or chain is pulled over.
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