The contactforce exerted by a body A onanother bodyB is equal to the normal forcebetween the bodies . We conclude that the surfacesmustbefrictionaless the force of frictionbetween the bodies is zero the magnitude of normal force equals that of friction the bodies may be rough but they don't slip on each other .

The contactforce exerted by a body A onanother bodyB is equal to the n

1.	The contactforce exerted by a body A onanother bodyB is equal to the normal forcebetween the bodies . We conclude that the surfacesmustbefrictionaless the force of frictionbetween the bodies is zero the magnitude of normal force equals that of friction the bodies may be rough but they don't slip on each other .
Answer» a and C are TRUE a, B and d are true b ANDD aretrue all are true ANSWER :C

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