A body mass 20 kg is pulled on a horizontal surface by applying a horizontal

A body mass  20 kg  is  pulled  on a horizontal surface by applying a horizontal If the coefficient of friction between the body and the horizontal surface is 0.25. What  is the force of friction exerted by the horizontal surface on the box.

  1. 49 N
  2. 4.9 N
  3. 0.49 N
  4. 9.4 N

 

Anurag Mishra Professor Asked on 18th April 2016 in Physics.
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