Question

what do
young think by conservation
of momentum
and derive its expression​

Answer 1

Momentum Conservation Principle

The Law of Action-Reaction (Revisited)

Momentum Conservation Principle

Isolated Systems and Collision Analysis

Collision Analysis and Momentum Problems

Using Equations as Guides to Thinking

Momentum Conservation in Explosions

One of the most powerful laws in physics is the law of momentum conservation. The law of momentum conservation can be stated as follows.

For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. That is, the momentum lost by object 1 is equal to the momentum gained by

Hope it helps uhh.

Mark as brainleist.