Physics

Problem

A stone tied to a string is whirled in a horizontal circle of radius

0.40\,\text{m}

. It completes one revolution in

2.0\,\text{s}

. Calculate its speed. a)

2.5\,\text{m/s}

1.3\,\text{m/s}

0.63\,\text{m/s}

3.1\,\text{m/s}