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Classical Mechanics

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Net Work Scenarios

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A ball is attached to the end of a string. For which of the following scenarios is the net work done on the ball non-zero? Select ALL that apply.

A

The ball is lifted by the string at a constant velocity.

B

The ball is lifted by the string with increasing velocity.

C

The ball is swing in a circle by the string.

D

The string is cut allowing the ball to fall.