Question

what is third law of motion...............​

Answer 1

Explanation:

Answer:

Newton's third law of motion states that there is an equal and opposite reaction for every action.

Newton's first law tells us that to bring a change in the state of rest or in the state of motion of an object, a force is needed i.e., a force produces a change in velocity of the object. Newton's second law of motion tells us about the magnitude of acceleration produced by the force when applied on the object. These two laws do not explain how the forces acts on the object. This question is answered by Newton's third law, which states:-

To every action there is always an equal and opposite reaction.

Examples:-

1.)

Consider a book lying on a table. The weight of the book acts vertically downwards, but the book does not move downwards. It implies that the resultant force on the book is zero, which is possible only if the table exerts an equal upward force on the book, equal to the weight of the book. This force on the book balances the weight of the book.

2.)

While moving on the ground, we exert a force by a feet to push the ground backwards , the ground exerts a force of the same magnitude on our feet forward which makes us to move forward.

Hope it helps.

Answer 2

Answer:

Force is a push or pull acting on an object resulting in its interaction with another object. Force is a result of an interaction. Force can be classified into two categories: contact force such as frictional force and non-contact force such as gravitational force. According to Newton, when two bodies interact, they exerted force on each other and these forces are known as action and reaction pair which is explained in Newton’s third law of motion.

Newton’s third law of motion states that

When one body exerts a force on the other body, the first body experiences a force which is equal in magnitude in the opposite direction of the force which is exerted.

The above statement means that in every interaction, there is a pair of forces acting on the interacting objects. The magnitude of the forces are equal and the direction of the force on the first object is opposite to the direction of the force on the second object.

The mathematical representation of Newton’s third law of motion is let A be the body exerting force F⃗ on the body B, then body B too exerts a force −F⃗ on body A, which is given as:

F⃗ AB=−F⃗ AB

Newton’s third law of motion is associated with conservation of momentum. According to the law, for every action there must be an equal and opposite reaction.