A) \[105\,\,m/s\]
B) \[205\,\,m/s\]
C) \[210\,\,m/s\]
D) \[250\,\,m/s\]
Correct Answer: A
Solution :
Speed of thief's car w.r.t. ground \[{{v}_{r}}=192\,\,km/h\] Speed of police van w.r.t. ground \[{{v}_{p}}=30\,\,km/h\] Speed of bullet w.r.t. police van \[{{v}_{B}}=150\,\,m/s=540\,\,km/h\] \[v={{v}_{BG}}+{{v}_{GT}}\] \[v={{v}_{B}}+{{v}_{P}}+{{v}_{T}}\] \[=540+30-192\] \[[\because \,\,{{v}_{G}}={{v}_{T}}]\] \[=378\,\,km/h=378\times \frac{1000}{3600}m/s=105\,\,m/s\]You need to login to perform this action.
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