Figure shows the velocity-time graph for two masses `R` and `S` that collided elastically. Which of the following statements is true?

i. `R` and `S` moved in the same direction after the collision.
ii. The velocities of `R` and `S` were equal at the mid time of the collision.
iii. The mass of `R` was greater than mass of `S`.
Which of the following is true?

Options

A. I only
B. II only
C. I and II only
D. I, II and III

Answer

D

Explanation

`COLM : m_(R ) (0.8) + m_(R ) (0.2) + m_(S)(1.0)`
`rArr 0.6 m_(R ) = m_(S) rArr m_(R ) gt m_(S)`