A) 10 J
B) 14 J
C) 18 J
D) 4 J
Correct Answer: C
Solution :
\[{{E}_{1}}=\frac{1}{2}k{{x}^{2}},{{E}_{2}}=\frac{1}{2}k{{y}^{2}},\] \[E=\frac{1}{2}k{{(x+y)}^{2}}={{E}_{1}}+{{E}_{2}}+2\sqrt{{{E}_{1}}{{E}_{2}}}\] \[=2+8+2\sqrt{16}=18J\]You need to login to perform this action.
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