Question

Briefly explain how a horse is able to pull a cart...

Answer 1

To move a cart with constant speed the horse has to apply a force continuously. If horse exerts force for a while then the frictional force that acts continuously on wheels of the cart due to road makes the cart slow down gradually .To aviod this the horse must apply force continuously to pull the cart with constant speed to over come the friction.

Answer 2

Question :-

Why is a horse able to push the cart if action is always equal to reaction ?

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Answer :-

The horse exerts a force on the ground.

This force acts as the action.

According to Newton's third law of motion , every action has an equal and opposite reaction.

The action here was the force exerted by the horse on the ground.

The force exerted faces a reaction opposite to the action.

This reaction helps the horse to move forward.

In simple words , the force exerted by the horse on the ground faces an opposite reaction which helps the horse to move forward .

This helps the horse to push the cart forward .