JAMB - Physics (2007 - No. 28)

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

3 J

4 J

5 J

6 J

Explanation

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

JAMB - Physics (2007 - No. 28)

Explanation

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