Question: What machines have more than one simple machine in them?
Answer: A machine is a structure that consists of a framework and a number of parts that are fixed or can move to do work. A machine can be as straightforward as a screw or as complex as a bus.
Machines often use one or more simple machines (wedge, screw, inclined plane, wheel and axle, lever, pulley) that work together to do a job.
Here are a few examples of everyday machines that contain several simple machines.
A manual can-opener:
A pair of scissors:
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This page last updated on: June 3, 1999
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