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Problem 4: A man pulls a trolley through a distance of 50 m by applying a force of 100 N which makes an angle of 300 with horizontal. Calculate the work done by the man.

Solution

Force applied on the trolley, F = 100 N,                  Distance covered, d = 50 m

Angle between force and distance, θ = 300

Work done, W = ?

Formula                               W = Fdcosθ

Put the values,                  W = 100 × 50 × 0.866                       (cosθ = 0.866)

OR                                          W = 4330 J

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