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 (Take `g=10m//s^(2)`)

Options

A. `4ms^(-1)`
B. `6.25ms^(-1)`
C. `2ms^(-1)`
D. `16ms^(-1)`

Answer

A

Explanation

For water not to spil, `(mv^2)/(r)=mg`
or minimum speed at the highest points v `=sqrt(rg)=sqrt(1.6xx10)=4ms^(-1)`