A) 20%
B) 25%
C) 30%
D) 45%
Correct Answer: B
Solution :
The situation is shown in figure. Conserve the momentum for the two cases and then solve the equation. First fake 1st sheet and bullet as the system. \[mu=m{{u}_{1}}+{{m}_{1}}v\] Now take 2nd sheet and bullet as the system. \[m{{u}_{1}}=(m+{{m}_{2}})v\] Solving this equation, we get the value of \[\frac{(u-{{u}_{1}})}{u}\times 100%=25%\]You need to login to perform this action.
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