A) \[25%\]
B) \[33.3%\]
C) \[75%\]
D) \[90%\]
Correct Answer: C
Solution :
\[\eta =\frac{useful\,work}{total\,work}=\frac{mgh}{F\times d}=\frac{(75g)\times 3}{250\times 12}=0.75\]You need to login to perform this action.
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