Math Help - Rev per sec.

1. Rev per sec.

A belt passes over a rim of a flywheel 30cm in diameter. Find the speed of the belt if it drives the wheel at the rate of 5 rev/sec.

2. Originally Posted by olokish
A belt passes over a rim of a flywheel 30cm in diameter. Find the speed of the belt if it drives the wheel at the rate of 5 rev/sec.
1. Calculate the perimeter p of the flywheel.

2. The speed of the belt is then

$v = 5p\ \frac{cm}{s}$