Question

In head on elastic collision of two bodies of equal masses

• A. The velocities are interchanged
• B. The speeds are interchanged
• C. The momenta are interchanged
• D. The faster body slows down and the slower body speeds up

Answer 1

Answer: (A), (B), (C), (D)

The faster body slows down and the slower body speeds up

Correct options are (a),(b),(c) and (d)

Features of head-on collisions:

When a projectile collides head-on with a stationary object of the same mass:

1. The projectile will come to a stop and the target will move away at the same speed.
2. As a result, the velocities are swapped, i.e. the speeds are swapped, and the momentum is swapped as well.
3. In addition, if the target has some velocity, the quicker body slows down while the slower body accelerates.

Hence all the options are correct (a, b, c, d)