A waiter is carrying a tray above his head and walking at a constant velocity. If he applies a force of 5.0 newtons on the tray and covers a

Question

A waiter is carrying a tray above his head and walking at a constant velocity. If he applies a force of 5.0 newtons on the tray and covers a distance of 10.0 meters, how much work is being done?

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Philomena 5 years 2021-08-07T15:01:49+00:00 1 Answers 55 views 0

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  1. Euphemia
    0
    2021-08-07T15:03:44+00:00
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    Answer:

    0 J

    Explanation:

    Work is the dot product of force and displacement.  In other words, it is the force times the distance traveled in the direction of the force.

    W = Fd cos θ

    In this case, the force is vertical and the displacement is horizontal.  So the angle between them is θ = 90°.  The work done is:

    W = (5.0 N) (10.0 m) cos(90°)

    W = 0 J

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