# Linear Velocity

• December 4th 2008, 03:46 PM
Joanie
Linear Velocity
A pulley of radius 15 cm turns at 8 revolutions per second. What is the linear velocity of the belt driving the pulley in meters per second?

Here is the way I did this--am I correct?

v = 2pi r/T

v = 2pi (15)/8

v = 94.2/8

v = 11.8
• December 4th 2008, 04:47 PM
skeeter
incorrect ...

T is not 8 ... 8 revolutions per second means $T = \frac{1}{8}$ sec.

also, you need to pay attention to your units ... 15 cm = .15 m
• December 5th 2008, 10:59 AM
Joanie
Thanks to Skeeter
12/5/08

Hi Skeeter--

Thanks for your help on the linear velocity problem.

Joanie(Hi)