Adam applies an input force to the pulley as he pulls down to lift the object. as he does this, adam wonders about how the pulley is him. how is the pulley adam lift the object?

a. a fixed pulley lowers the amount of force needed to do the same amount of work.

b. a fixed pulley increases the distance over which the force is applied.

c. a fixed pulley adam change the direction of the effort force.

d. all of these answers are correct.

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

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