Physics

Problem

A grinding wheel of radius

0.25\,\text{m}

spins at

90\,\text{rev}\!\big/\!\text{min}

. What is the linear speed, in metres per second, of a point on the edge of the wheel? a)

4.7\,\text{m}/\text{s}

1.2\,\text{m}/\text{s}

2.4\,\text{m}/\text{s}

24\,\text{m}/\text{s}