A boy holds a bird in his hand.The reaction force to the normal force exerted on the bird by the boy's hand is the force of:
A)the Earth on the bird.
B)the bird on the Earth.
C)the hand on the bird.
D)the bird on the hand.
E)the Earth on the hand.

Question

Quizplus · Accepted Answer

According to Newton's Third Law of Motion, for every action, there is an equal and opposite reaction. In this case, the normal force exerted on the bird by the boy's hand is the action force, and the reaction force is the force exerted on the hand by the bird. Therefore, the correct choice is D, the bird on the hand.

A Boy Holds a Bird in His Hand