Question

if a body of mass 20kg is placed on a rough surface, when a force of 5n is applied in east direction the body remains at the same position the value of frictional force ----------------- and ------------- direction

Answer 1

Answer:

5 N and westwards

Explanation:

5 N is applied Eastwards, but the body doesn't move.

      static friction is a self adjusting force which opposes the applied force with the same magnitude as that of applied force(which is why it is self-adjusting).

So,  if force is unable to move it

  then,    Applied force = - friction

               5 N = - friction

           - 5 N = friction

-ve indicates direction,   so the friction is applied westwards with magnitude 5 N,

[NOTE: applied force = static friction,      *till body starts to move]