Question

A horse pulls a cart along a flat road. Consider the following four forces that arise in this situation.
(1) the pulling force of the horse on the cart
(II) the pushing force of the horse on the road
(III) the pulling force of the cart on the horse
(IV) the pushing force of the road on the horse
Suppose that the horse and the cart have started from rest, and as time goes on, their speed increases
in the same direction. Which one of the following conclusions is correct concerning the magnitudes
of the forces mentioned above?
(1) Force (I) exceeds force (III)
(2) Force (II) exceeds force (IV)
(3) Force (III) is less than force (II)
(4) Force (III) exceeds force (IV)​

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Answer 1

The correct option is (3)

Answer 2

The correct answer would be option (1).

This is because the pulling force of the horse on the cart needs to be much higher in order to pull the cart forward. If the pulling force of the cart would be greater, then the horse would be unable to pull the cart.