A body is suspended from a smooth horizontal nail by a string of length 0.25 meter. What minimum horizontal velocity should be given to it in the lowest position so that it may move in a complete vertical circle with the nail at the center ?
A
3.5 ms –1
B
4.9 ms –1
C
7 
ms –1
ms –1
D
ms –1
Text Solution
Verified by ExpertsThe correct answer is:
A
When a string fixed with a nail, moves along a vertical circle, then the minimum horizontal velocity at the lowest point of circle is given b
v = 
= 
= 3.5 m/s
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