Question

Defination of law of conservation of momentum​

Answer 1

Answer:

Explanation:

Momentum = mass * velocity.

Total momentum of a system is always conserved. During a collision, momentum lost by one body is gained by another body. During a collision , assume F1 and F 2 be the forces acting on the two bodies.

Assuming that only one collision takes place and assuming it to be an isolated system , F1= -F2 (Newtons 3rd law).

But the collision time is the same for both the bodies, t1 = t2.

Momentum of body 1 = F1*t1 and body 2 = F2*t2

F1*t1 = F1*t2 = -F2*t2 ,

Impulse = F * t , thus Impulse 1 = - Impulse 2

Impulse = change in momentum (by second law of Newton) ,

thus , m1 * v1 = - m2 * v2 ,

thus this implies momentum gained by one body = momentum lost by another body.

Answer 2

Law of conservation of momentum states that the total momentum of the body remains constant until end external force is applied.