Question

state and explain third law of motion?​

Answer 1

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Newton's third law:

Every action force there is always a reaction force.

$\orange\Rightarrow$ if a body exerts a force on a second body, the second body exerts a force that is equal in magnitude and opposite in direction to the first force.

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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 exert 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.

Explanation:

Examples of Interaction Force Pairs

A variety of action-reaction pairs are evident in nature. We have listed a few below, and they are as follows:

1. Propulsion of fish through water is an example of an action-reaction pair. A fish makes use of its fins to push water backwards. This push serves to accelerate the fish forwards. The size of the force on the water equals the size of the force on the fish; the direction of the force on the water (backwards) is opposite the direction of the force on the fish (forwards).

2. The flight of the bird is an example of an action-reaction pair. The wings of the bird push the air downwards. The air pushes the air upwards.

3. A swimmer pushes against the water, while the water pushes back on the swimmer.

4. Lift is created by helicopters by pushing the air down, thereby creating an upward reaction force.

5. Rock climbers pulling their vertical rope downwards to push themselves upwards.

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