When two objects collide, then their total momentum before and after collision remains:

Q. Two bodies of equal masses and speeds collide head-on elastically. Total momentum after collision is

Q. Given in the chapter:
If we have mass m₁ and velocityu₁ of one moving object and mass m₂ and velocity u₂of another moving object before collision and​massm₁and velocity​ v₁ of the first object andmassm₂and velocityv₂of the second object after collision, then the objects' momentum before the collision and after the collision will remain same.
Will the momentum be same before and after the collision if the mass is changed( like breaking apart of one object) of an object after the collision?

Q. Two masses ${\text{m}}_1$ and ${\text{m}}_2$ collide with each other. Before the collision, the velocities are ${\text{u}}_1$ and ${\text{u}}_2$ respectively. After the collision, the velocities are ${\text{v}}_1$ and ${\text{v}}_2$ respectively. The total final momentum after collision is given by:

Q. Two spheres of masses $3kg$ and $2kg$ collide directly. Their relative velocity before collision is $15m/s$ and after collision is $5m/s$. The total loss of $k.E.$ in joules due to collision is _____.