Work Energy And Power Question 110
Question: A bullet of mass 50 gram is fired from a 5 kg gun with a velocity of 1km/s. the speed of recoil of the gun is [JIPMER 1999]
Options:
A) $ 5m/s $
B) $ 1m/s $
C) $ 0.5m/s $
D) $ 10m/s $
Show Answer
Answer:
Correct Answer: D
Solution:
According to conservation of momentum $ m _{B}v _{B}+m _{G}v _{G}=0 $
therefore $ v _{G}=-\frac{m _{B}v _{B}}{m _{G}} $
$ v _{G}=\frac{-50\times {10^{-3}}\times 10^{3}}{5}=-10m/s $
