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23 July, 00:57

Suppose you exert a 400-N force on a wall but the wall does not move. The work you are doing on the wall is : unknown, because the mass of the wall is not given

zero, because the wall is not moving

3920 J

400 J

+1
Answers (1)
  1. 23 July, 02:06
    0
    W = 0 : The work done on the wall is zero, because the wall is not moving

    Explanation:

    Work theory

    Work is the product of a force applied to a body and the displacement of the body in the direction of this force.

    W = F*d Formula (1)

    W: Work (Joules) (J)

    F: force applied (N)

    d=displacement of the body (m)

    The work is positive (W+) if the force goes in the same direction of movement.

    The work is negative (W-) if the force goes in the opposite direction to the movement

    Data

    F = 400-N

    d = 0

    Problem development

    We apply formula (1) to calculate the work done on the wall:

    W = 400*0

    W=0
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