A) 0.05 m/s
B) 0.5 m/s
C) 0.1 m/s
D) 0.2 m/s
Correct Answer: D
Solution :
Here, mass of the bullet \[{{m}_{1}}=0.1\,kg\] Speed of bullet \[{{v}_{1}}=100\,\,m\text{/}s\] Mass of the gun \[{{m}_{2}}=50\,kg\] According to the law of conservation of momentum is \[{{m}_{1}}{{v}_{1}}={{m}_{2}}{{v}_{2}}\] \[0.1\times 180=50\times {{v}_{2}}\] \[{{v}_{2}}=\frac{0.1\times 100}{50}=0.2\,m\text{/}s\]
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