Alex pulls on s 15-kg crate with a force of 35 N at an angle of 40 degrees for the horizontal. How much work does he do in pulling the crate at a distance of 20 m?
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The work done by an object exerting a force F at an angle θ and at a distance d is given by
where:
W = work
F = force
d = distance
θ = angle of the force with the horizontal
Solving for W
W = Fd cos θ
W = (35 N)(20 m)(cos 40°)
Therefore, the work done is 536.23 J.