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A cane filled with water is revolved in a vertical circle of radius 4 m and water just does not fall down. The time period of revolution will be –

A

1 sec

B

10 sec

C

8 sec

D

4 sec

Text Solution

Verified by Experts

The correct Answer is:
D
The Speed at the highest point must be `vge sqrt(rg)`
Now `v=r omega =r (2pi//T)`
`:. R(2pi//T) gt sqrt(rg) or T lt (2pi r)/( sqrt(rg)) lt 2pi sqrt(((r)/(g)))`
`:. T=2pi sqrt(((4)/(9.8)))=4 sec`.
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