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A pendulum of mass m and length l is rel...

A pendulum of mass m and length l is released from rest in a horizontal position. A nail, a distance d below the pivot, causes the mass to move along the path indicated by the dotted line. The minimum distance such that the mass will swing completely round in the circle shown in figure is d then `(5d)/L` is

A

2

B

3

C

4

D

5

Text Solution

Verified by Experts

The correct Answer is:
2
`sqrt(2gl) =sqrt(5 g) (l-a) rArr 2l =5l-5d`
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