Q68 / 90 · JEE Main 2018 (08 Apr) · Physics
In a collinear collision, a particle with an initial speed strikes a stationary particle of the same mass. If the final total kinetic energy is greater than the original kinetic energy, the magnitude of the relative velocity between the two particles, after the collision, is
- A
- B
- Correct answerC
- D
Solution

. Conservation of momentum, . Conservation of energy,
.
Hence, the correct answer is option: 'C'.