Question

Short answer questions :-

If action is always equal to the reaction , explain how a horse can pull a cart ?

Answer 1

A horse can pull a cart only based on Newton's third law i.e Every action has its equal and opposite reaction...
The force exerted by the horse is towards the front side and it applies greater force that is more than the friction....
The cart too exerts a force that is towards backwards and maintains to be in the position as it is but the force exerted by the horse is more so the cart happens to move in the direction of cart...

Through this we can also say that AN OBJECT REMAINS IN THE STATE OF REST OR MOTION UNLESS FORCED TO CHANGE ITS STATE BY UNBALANCED FORCE..

It also proves the second law of motion... think peacefully.. :)

Hope it helps u my frnd..

And here Cutie Barbie...

Answer 2

Newton's third law states that to every action, there is always an equal (in magnitude) and opposite (in direction) reaction.

In case of horse cart, The horse pushes the ground with it's foot in the backward direction by pressing the ground. As a result of this force of action ( i.e. backward push ), the ground pushes the horse in forward direction

According to Newton's third law of motion , The Ground pushes the horse in forward direction. Thus, the horse moves in a forward direction . As the cart is attached to the horse , the cart too moves in the forward direction.

Hence, The horse pulls the cart .