Question

the magnitude of action force is​

Answer 1

The law of action-reaction (Newton's third law) explains the nature of the forces between the two interacting objects. According to the law, the force exerted by object 1 upon object 2 is equal in magnitude and opposite in direction to the force exerted by object 2 upon object 1.

Answer 2

The magnitude of action force is equal and opposite to the reaction force.

Hope this would be the correct ans and helped you...