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Which statements are true?

A.
All simple machines are basically the same kind of machine.

B.
Pulleys are simple machines.

C.
One of the simple machines on a bicycle is a wheel & axle.

D.
Pulleys can change the direction of force.

E.
First-class levers are the best kind of levers.

1 answer

B.
Pulleys are simple machines.

C.
One of the simple machines on a bicycle is a wheel & axle.

D.
Pulleys can change the direction of force.
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