A) \[\frac{1}{2}\,m{{v}^{3}}\]
B) \[m{{v}^{3}}\]
C) \[\frac{1}{2}m{{v}^{2}}\]
D) \[\frac{1}{2}{{m}^{2}}{{v}^{2}}\]
Correct Answer: A
Solution :
Let m is the mass per unit length then rate of mx mass per \[\sec =\frac{mx}{t}=mv\] |
Rate of \[KE=\frac{1}{2}(mv)\,{{v}^{2}}=\frac{1}{2}\,m{{v}^{3}}\] |
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