A bullet of mass 50 g , moving a velocity of `200 m*s^(-1)` , strikes and penetrates a wooden block. If the resistance f the wooden block on the bullet is 4900 N, find the distance up to which the bullet penetrates the block.

Explanation

Let the distance in the block that the bullet penetrates through be x.
Work done = change in kinetic energy
`therefore 4900 xx x =1/2 xx0.05 xx[(200)^2-0^2]`
`therefore x=(0.05xx4xx10^4)/(2xx4900) =0.204 m. `