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.
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