Question

When a horse pulls the tonga, the tonga moves forward due to:
(A) Force exerted by horse in forward direction
(B) Reaction of the tonga
(C ) reaction of the ground on the horse
(D) none of the above

Answer 1

Hint: Apply Newton’s third law of motion. That is, for every action there will be always an equal and opposite reaction. There will be two types of forces acting here. The first one is called action and the second one is called reaction. And the direction of two will be equal and opposite to each other.

Complete answer:
A force occurs as a result of interaction between a particle. That may be a pull or push on some objects. As a result of interaction with an object, they will exert a force on each other. There will always be two forces coming along with every type of interaction. The first force may be called action, whereas the other is called reaction.
That is Newton’s third law. It can be stated as,
For all the actions, there will always be an equal and opposite reaction.
Thus there will be always a pair of forces acting between them. And the direction of two will be equal and opposite to each other.
Here also a pair of forces are acting between them. When horses push the ground backward, thus there occurs a force of action. And as a result of this action horses move forward and it is called reaction. At the same time tonga will have an opposition reaction in the forward direction.
Here the horse is applying a force on the ground backward in order to go forward.

So, the correct answer is “Option D”.

Note:
In Newton’s third law of motion there will always be two forces acting between. The first force may be called action, whereas the other is called reaction. And the direction of two will be equal and opposite to each other. Thus where there is action and reaction, Newton’s third law is applied.