| In a perfectly elastic head on collision of two bodies of equal mass |
| A) velocities of the bodies are exchanged |
| B) velocities of the bodies are doubled |
| C) velocities of the bodies are halved |
| D) any of these depending on the mass ratio |
| In a perfectly elastic head on collision of two bodies of equal mass |
| A) velocity of separation is same as velocity of approach |
| B) velocity of separation is greater then velocity of approach |
| C) velocity of separation is smaller then velocity of approach |
| D) any of these depending on the mass ratio |
| In a perfectly elastic oblique collision of two equal masses |
| A) velocities after collision are oppositely directed |
| B) velocities after collision are at right angles to each other |
| C) velocities after collision are in the same direction |
| D) angle between the final velocity vectors varies |
| Two bodies of equal mass moving on a smooth horizontal surface undergo an elastic collision.Their velocities after collision are |
| A) oppositely directed in Laboratory reference frame |
| B) oppositely directed in Center of Mass reference frame |
| C) oppositely directed in both the reference frame |
| D) oppositely directed in neither of the reference frame |
| Two bodies of unequal mass moving on a smooth horizontal surface undergo an elastic collision.Their velocities after collision are |
| A) oppositely directed in Laboratory reference frame |
| B) oppositely directed in Center of Mass reference frame |
| C) oppositely directed in both the reference frame |
| D) oppositely directed in neither of the reference frame |