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7 February, 21:48

A woman exerts a horizontal force of 10 pounds on a box as she pushes it up a ramp that is 4 feet long and inclined at an angle of 30 degrees above the horizontal.

Find the work done on the box.

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  1. 8 February, 01:09
    0
    W = 51.9 ft-lbs

    Explanation:

    given,

    Force, F = 10 Pounds

    angle with horizontal, θ = 30°

    distance, R = 4 ft

    we know,

    Work done is equal to force into displacement.

    displacement, s = 6 cos θ

    = 6 cos 30° = 5.19 ft

    work done = F. s

    W = F. s

    W = 5.19 x 10

    W = 51.9 ft-lbs

    the work done on the box is equal to 51.9 ft-lbs.
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