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A 1-kg stone at the end of 1m long strin...

A `1-kg` stone at the end of `1m` long string is whirled in a vertical circle at a constant speed of `4ms^-1`. The tension in the string is `6N` when the stone is

A

2m/sec

B

10 m/sec

C

4 m/sec

D

5 m/sec

Text Solution

Verified by Experts

The correct Answer is:
C
For water from the bucket does not spill, N`ge`0 at highest point,
for `N ge0`, so minimum constant speed.
`v=sqrt(rg)=sqrt(1.6xx10)=4 m//s`
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