Two body A and B are in contact at point ‘O’. Body A Press against the body B. Hence action of body A on the body B is F. Reaction of Body B on body A is R. From Newton's third law of motion (i.e., action = reaction), both these forces are equal there for F = R
i.e., Action = Reaction
Or, “Any pressure on a support causes an equal and opposite pressure from the support so that action and reaction are two equal and opposite forces.”
