Question

A bucket tied at the end of a $1.6m$ long string is whirled in a vertical 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 $g=10m/{sec}^2)$

• A. $4m/sec$
• B. $2m/sec$
• C. $1m/sec$
• D. $8m/sec$

Answer 1

The correct option is A $4m/sec$

For Water not to spill out of bucket

$\begin{array}{c}m{v}^2=mg\\ v=\sqrt{rg}=\sqrt{1.6\times 10}\\ V=\sqrt{16}=4m{s}^{-1}\end{array}$