Question

When a bullet is fired at 48m/s into a block of unifoem resistance it comes out with speed u if it is fired into block at u it is just able to come out when u is ?

Answer 1

\[\LARGE {v_f}^2={v_i}^2+2as\]
\[\implies \large 2as= {v_f}^2-{v_i}^2\]