Conservation of Momentum

What are internal and external forces? Give example.

Define external force.

How do you calculate momentum after a collision?

For a collision occurring between two objects in an isolated system, the total momentum of the two objects before the collision will not be equal to the total momentum of the two objects after the collision.

Find the recoil velocity of a gun having mass equal to $5 \mathrm{kg}$, if a bullet of $25 \mathrm{gm}$ acquires the velocity of $500 \mathrm{m}/\mathrm{s}$ after firing from the gun.

Give the formula for conservation of momentum?

The principle of conservation of linear momentum states that in a system total momentum:

Two bodies of masses $m$ and $3 m$, moving with velocities $3 v$ and $v$ respectively along the same direction, collide with each other. After the collision, they stick together and move with a velocity $V$ in the same direction. Then