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20 January, 14:23

Which of the following situations discusses work in the scientific

sense?

A. A body moves at constant velocity.

B. An object is held three feet above the ground.

C. An object is lifted three feet.

D. A table holds up a 25 pound weight.

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Answers (1)
  1. 20 January, 17:40
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    I would say A depending on its end location because it you are walking at a constant velocity and conclude the walk exactly where you began, you have used energy, but no work has been done.

    Not C because the object begins at ground level and is then lifted above 3 feet, which has a displacement of 3 feet in the y-direction (vertical) but no distance has been traveled.
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