A block ‘A’ of mass M moving with speed u collides elastically with block B of mass m which is connected to block C of mass m with a spring. When the compression in spring is maximum the velocity of block C with respect to block A is (neglect friction):
| A. |
Zero |
| B. |
`M/(M+m) u` |
| C. |
`(m/(M+m))u` |
 |
| D. |
`m/M u` |