A) 192J
B) 96J
C) 144 J
D) 288J
Correct Answer: D
Solution :
By law of conservation of linear momentum, the velocity of the 4 kg mass is\[12\text{ }m{{s}^{-1}}\]. Therefore, \[KE=\frac{1\times 4\times {{(12)}^{2}}}{2}=288J\]You need to login to perform this action.
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