Question

Body A collides with body B. A exerts a force of 10N on B. The force that B exerts on A is _______ .

Answer 1

1. Newton's third law states that if object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
2. A exerts a force of 10N on B. So, by Newton's third law B will also exert 10 N of force on A in opposite direction.

Hence, Body A collides with body B. A exerts a force of 10N on B. The force that B exerts on A is 10 N.