A force of 5 N moves a body through a distance of 10 m at an angle of 60° to the force. The work done is:

Answer: B. 25 J

Work done = F x d x cos(angle). Here W = 5 x 10 x cos 60 degrees = 50 x 1/2 = 25 J. Only the part of the force along the motion does work, so the answer is not 50 J.

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