A) 8 N
B) \[2\times {{10}^{4}}\,N\]
C) 4 N
D) \[{{10}^{4}}\,N\]
Correct Answer: B
Solution :
\[F=\frac{dp}{dt}=m\frac{dv}{dt}=\frac{m\times 2v}{1/50}\]= \[\frac{2\times 2\times 100}{1/50}=2\times {{10}^{4}}N\]
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