Question

the friction force applied by ground on block b is. block b is moving with the v =10m/s^2

Answer 1

The blocks move with constant velocity. Thus the net force acting on the system is 0.

External force acting on A 20N. Since the net force acting on B is 0, friction must be 20N in opposite direction of external force.

External force acting on A is 0 and net force on A is 0. Hence friction on A due to B is 0.

Hence, answer is 0.

Answer 2

Answer:answer is 20 N

Explanation:because the friction acts in opposite direction of force with same value i.e 20N