Physics

Problem

A hammer in an athletics event is whirled in a horizontal circle of radius

0.8\,\text{m}

. It completes

50

revolutions in

25\,\text{s}

. What is the speed of the hammer? a)

5\text{ m/s}

20\text{ m/s}

10\text{ m/s}

12.6\text{ m/s}