Two small particles of equal masses stant moving in opposite direction from a point `A` in a burtizonetal circule orbic their tangention velocity are `V` and `2V` , respectively as shown in the figure between collsions , the particals move with constant speed After making how many elastic collition , other the then that at `A` these two partical will again reach the point `A` ?

Options

A. `4`
B. `3`
C. `2`
D. `1`

Answer

C

Explanation

After the head - on elastic collision , velocities will be exchanged. Since one speed is double the another , so one particle will travel a distance `s`, another will travel `2 s`. After the initial collision , particles will collide again as shown.