A) 0
B) 288 J
C) 172.8 J
D) 144 J
Correct Answer: C
Solution :
Loss in \[KE=\frac{{{m}_{1}}{{m}_{2}}}{2({{m}_{1}}+{{m}_{2}})}{{({{u}_{1}}{{u}_{2}})}^{2}}\] \[=\frac{4\times 6}{2\times 10}{{(12-10)}^{2}}=172.8\,J\] Hence, the correction option is [c].
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