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4.6 Vocabulary

Across
a stiff beam that rests on a support called a fulcrum that lifts or moves loads
any device that helps us do work by redirecting force; there are six kinds: an inclined plane, a lever, a pulley, a screw, a wedge, and a wheel and axle
a machine that changes potential energy to kinetic energy so it can launch objects into the air
Down
the force you apply to a machine
an object that a simple machine moves or the force that the simple machine must overcome
to throw something with a lot of force