A bullet of mass `10gm` moving with a horizontal velocity `100m//s` passes through a wooden block of mass `100gm`. The block is resting on a smooth horizontal floor. After passing through the block the velocity of the bullet is `10m//s` the velocity of the emerging bullet with respect to the block is .

Options

A. `10m//s`
B. `9m//s`
C. `1m//s.`
D. `5m//s`

Answer

C

Explanation

`m_(1) u_(1) =m_(1) v_(1) + m_(2) v_(2), v_(rel) =v_(1) =v-(2)`