A ball of mass 5 kg moving at 3 m/s collides with another ball of mass 3 kg moving at 5 m/s in the same direction. If the balls move together after the collision in the same direction, find their common velocity.

Q. A steel ball having mass $100\text{g}$ is moving with velocity $20\text{m/s}$. In the same direction, a ball of clay having mass $20\text{g}$ is moving with velocity $10\text{m/s}$. If after some time, both balls collide and stick together, what will be the speed of steel ball after collision?

Q. A truck of mass 500 kg moving at 4 m/s collides with another truck of mass 1500 kg moving in the same direction at 2 m/s. What is their common velocity just after the collision if they move off together?

Q. A ball of mass $10kg$ is moving with a velocity of $10m/s$. It strikes another ball of mass $5kg$, which is moving in the same direction with a velocity of $4m/s$. If the collision is elastic, their respective velocities after the collision will be

Q. Ball $A$ of mass $5.0kilograms$ moving at $20m/s$ collides with ball $B$ of unknown mass moving at $10m/s$ in the same direction, After the collision, ball $A$ moves at $10m/s$ and ball $B$ at $15m/s$ in the same direction. What is the mass of ball $B$?

Q. Two balls $A$ and $B$ having equal masses and moving along the same straight line with velocities $+2\text{m/s}$ and $-5\text{m/s}$ respectively, collide elastically. If rightwards direction is considered as $+vex-$ axis, then their velocities after the collision will be respectively