A) 40 J
B) 80 J
C) 120 J
D) 60 J
Correct Answer: C
Solution :
[c]Work done \[=\int_{0}^{{{x}_{0}}}{{{p}_{0}}Axdx}+\frac{kx_{0}^{2}}{2}\] |
\[={{p}_{0}}A{{x}_{0}}+\frac{kx_{0}^{2}}{2}=80+40=120J\] |
where p = pressure of gas, \[{{p}_{0}}=\] atmospheric pressure k = spring constant \[{{x}_{0}}=\] compression in spring. |
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