A) \[(YA\alpha t)\,\,(L\alpha t)\]
B) \[\frac{1}{2}\,\,(YA\alpha t)\,\,(L\alpha t)\]
C) \[\frac{1}{2}\,\,(YA\alpha t)\,\frac{1}{2}\,(L\alpha t)\]
D) \[2\,(YA\alpha t)\,(L\alpha t)\]
Correct Answer: B
Solution :
[b] \[W=\frac{1}{2}F\Delta \ell \,\,(i);\] \[\Delta \,\ell =a\,\ell \,t,\,F=Y\,A\,\alpha \,t\] put above value in equation (i) \[W=\frac{1}{2}(YA\alpha t)\,(\alpha \ell t)\]You need to login to perform this action.
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