On a friction surface a block a mass `M` moving at speed `v` collides elastic with
Channel: Doubtnut
Date: 2020-01-19

On a friction surface a block a mass `M` moving at speed `v` collides elastic with another block of same mass `M` which is initially at rest . After collision the first block moves at an angle `theta` to its initial direction and has a speed `(v)/(3)`. The second block\'s speed after the collision is