1.

The maximum velocity at the lowest point, so that the string just slack at the highest point in a vertical circle of radius \[l\]             [CPMT 1999; MH CET 2004]

A.             \[\sqrt{gl}\]
B.                      \[\sqrt{3gl}\]
C.             \[\sqrt{5gl}\]   
D.             \[\sqrt{7gl}\]
Answer» D.             \[\sqrt{7gl}\]


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