Question

State and explain the law of conservation of momentum of the system of particle​

Answer 1

See the attachment.

The Principle of the Conservation of Momentum states that: if objects collide, the total momentum before the collision is the same as the total momentum after the collision (provided that no external forces - for example, friction - act on the system).

That's amazingly useful because it means that you can tell what is going to happen after a collision before it has taken place.

Principle of Conservation of Energy: Of course, energy is also conserved in any collision, but it isn't always conserved in the form of kinetic energy, so be careful.

Some simple examples:

To do any calculations for momentum, there are some simple rules to follow to make it easy:

Always decide which direction is positive and which is negative, then stick to it.

Always remember that the total momentum before the collision will be the same as the total momentum after the collision.

The conservation of momentum states:

Momentumbefore = Momentumafter

So, (P1 + P2) before= (P1 + P2) after

Or, m1u1 + m2u2 = m1v1 + m2v2

But notice that in this example, v1 = 0. So that term cancels and makes finding an answer much easier.

The linear momentum of a system of particles is equal to the product of the total mass M of the system and the velocity of the center of mass. ... This expression shows that if the net external force acting on a system of particles is zero (Fext = 0 N), the linear momentum of the system is conserved.