A boy drags a bag of rice along a smooth horizontal floor with a force…

Physics JAMB 2007

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

  • 3 J checkmark
  • 4 J
  • 5 J
  • 6 J

The correct answer is: 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
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