A) \[{{l}_{AD}}=4{{l}_{EF}}\]
B) \[O=\overline{X+Y}\]
C) \[O=\overline{XY}\]
D) \[O=\overline{X}.\overline{Y}\]
Correct Answer: A
Solution :
\[{{K}_{\max }}+{{U}_{\min }}=\text{Total mechanical energy}\] mass of rope of length\[{{K}_{\max }}=\left( \frac{1}{4} \right)+2\] \[\Rightarrow \] \[{{K}_{\max }}=\frac{9}{4}\]
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