Problem 3: 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
Given: Force applied on the trolley, F = 100 N,
Distance covered, d = 50 m
Angle between force and distance, θ = 300
Required: Work done, W = ?
Formula W = Fdcosθ
Put the values, W = 100 × 50 × 0.866 (cos300 = 0.866)
OR W = 4330 J (Answer)
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