A) 13.6 J
B) 27 J
C) 4.5 J
D) 54 J
Correct Answer: A
Solution :
\[\text{K}\text{.E=}\frac{1}{2}m{{v}^{2}}\] \[=\frac{1}{2}\times 3\times {{3}^{2}}=13.6\,\text{J}\] \[(\because m=3kg;v=3m/s,\text{given})\]
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