An elevator held by a single cable is ascending but slowing down. part a is the work done by tension positive, negative, or zero? is the work done by tension positive, negative, or zero? positive zero negative submitmy answersgive up part b what about the work done by gravity? what about the work done by gravity? positive zero negative

Question

Physics

Leandro

23 November, 21:22

An elevator held by a single cable is ascending but slowing down. part a is the work done by tension positive, negative, or zero? is the work done by tension positive, negative, or zero? positive zero negative submitmy answersgive up part b what about the work done by gravity? what about the work done by gravity? positive zero negative

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Answers (1)

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Davion Doyle · Answer 1

Refer to the diagram shown below.

By definition,

Work = Force * Distance

Part a.

The direction of motion is in the same direction as the tension in the cable. so the work done by tension is positive.

Answer: positive

Part b.

The direction of the weight (due to gravity) acts opposite to the direction of motion, so the work done by gravity is negative.

Answer: negative