A horse pulls a cart with force . As a result of this force the cart accelerates with constant acceleration. What is the magnitude of the force that the cart exerts on the horse?
A) zero Newtons
B) equal to the magnitude of
C) less than the magnitude of
D) more than the magnitude of
E) cannot be determined without additional information

Question

A horse pulls a cart with force  . As a result of this force the cart accelerates with constant acceleration. What is the magnitude of the force that the cart exerts on the horse?
A) zero Newtons 
B) equal to the magnitude of 
C) less than the magnitude of 
D) more than the magnitude of 
E) cannot be determined without additional information

Quizplus · Accepted Answer

According to Newton's Third Law, every action has an equal and opposite reaction. Therefore, the force that the cart exerts on the horse must be equal in magnitude to the force that the horse exerts on the cart (11ea6ebb_72d2_5ccd_9d78_691e8b8bf06e_TB6213_11). Thus, the answer is B, which is equal to the magnitude of 11ea6ebb_72d2_83de_9d78_f31df788d443_TB6213_11.

A Horse Pulls a Cart with Force