A boy drags a bag of rice along a smooth horizontal floor with a force of 2N applied at the angle of 60° to the floor. The work done after a distance of 3m is?

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A. 3 J
B. 4 J
C. 5 J
D. 6 J

Correct Answer:

Option A – 3J

Explanation

Effective component of the force along the horizontal = F cos 60o
Work done by this force : 60
F cos 60 x X
= 2 x 0.5 x 3
= 3J

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