A boy drags a bag of rice along a smooth horizontal floor with a force of 2N applied at the angle of 60o to the floor. The work done after a distance of 3m is
-
A.
3 J -
B.
4 J -
C.
5 J -
D.
6 J
Correct Answer: Option A
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