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
Verified Correct Answer: A.
Physical Principles & Numerical Solution
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
Source: Myschool Past Questions Archive (Record #14384)