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What minimum horizontal speed should be ...

What minimum horizontal speed should be given to the bob of a simple pendulum of length l so tht it describes a complete circle?

A

`gl`

B

`2 gl`

C

`sqrt2gl`

D

`sqrt5 gl`

Text Solution

Verified by Experts

The correct Answer is:
D
Kinetic energy given to a sphere at lowest point = potential energy at the height of suspension

`KE = (1)/(2) mv^(2)`
`implies (1)/(2) mv^(2) = mgl`
`:. V = sqrt(2gl)`
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