Which of these is not a simple machine?

A a pair of scissors
B a lever
C a ramp
D the pulley

Correct Answer: a pair of scissors

Any of the basic mechanical devices for applying a force are called simple machines.

There are 6 basic simple machines; the lever, the wheel and axle, the inclined plane, the wedge, the pulley, and the screw. Several of these simple machines are related to each other. But, each has a specific purpose in the world of doing work.

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