A bucket tied at the end of a `1.6m` long string is whirled in a verticle circle with constant speed. What should be the minimum speed so that the water from the bucket does not spill, when the bucket is at the highest position `(Takeg=10m//s^(2))`

Options

A. 2m/sec
B. 10 m/sec
C. 4 m/sec
D. 5 m/sec

Answer

C

Explanation

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`