A man pulls a trolley through a distance of 50 m by applying a force of 100N which makes an angle of 30° horizontal. Calculate the work done by the man. (4330 J)


Given:

Distance moved = d = 50 m
Force applied by man = F = 100 N
Angle made by the force with horizontal = 𝞡 = 30°

To Find:

Work done by the man = W = ?


Solution:

As work is a scalar quantity and is given by

W =  F . d = Fd cos 𝞡 

by putting values

W = 100 N ｘ 50 m ｘ cos 30°

W = 5000 N m ｘ 0.866

W = 4,330.127 J

or

W = 4,330 J -------------Ans



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