Rankers Physics
Topic: Laws of Motion
Subtopic: Third Law of Motion

When a horse pulls a cart, the force that helps the horse to move forward is the force exerted by
the cart on the horse
the ground on the horse
the ground on the cart
the horse on the ground

Solution:

Horse applies force on earth at certain angle. In turn earth apply force on horse horizontal component of this force helps the horse and cart to move forward. 

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