The velocity of a bullet is reduced from `200 m//s` to `100 m//s` while travelling through a wooden block of thickness `10 cm`. The retardation, assuming it to be uniform, will be.

Options

A. `10 xx 10^4 m//s^2`
B. `12 xx 10^4 m//s^2`
C. `12.5 xx 10^4 m//s^2`
D. `15 xx 10^4 m//s^2`

Answer

D