A) positive
B) negative
C) zero
D) infinite
Correct Answer: C
Solution :
Fraction of energy lost,\[\frac{\Delta u}{u}\] \[=\frac{mg(h-h')}{mgh}=\frac{h-h'}{h}\] Here, \[h=2\,\,m\]and\[h'=1.5\,\,m\] \[\therefore \] \[\frac{\Delta u}{u}=\frac{2-1.5}{2}=\frac{\mathbf{1}}{\mathbf{4}}\]You need to login to perform this action.
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