A ball is dropped from the ceiling and free falls to the floor. Which one of the following statements regarding the ball's motion is correct?
a. The ball speeds up as it falls to the ground.
b. The velocity of the ball is downward; uits value remains constant.
c. The velocity of the ball has a constant value of 9.8 m/s.
US 10:30

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

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