A weightlifter lifts a barbell above her head. Is there work done on the barbell?

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A weightlifter lifts a barbell above her head. Is there work done on the barbell?

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Dâu 1 year 2021-08-21T22:00:59+00:00 1 Answers 39 views 0

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    2021-08-21T22:02:39+00:00

    Answer:

    Yes

    Explanation:

    The work done on a body relies upon the force, displacement, and the angle made between the force and the displacement.

    Here, the force acting on the barbell is vertically downwards while the vertical displacement is in the upward direction. The angle made between the force (weight) and the displacement is [tex]180^{\circ}.[/tex] Thus, a work will be done on the barbell by its weight.

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