Homework Help: Angular velocity of a ball

1. Aug 12, 2011

druuuuuuuunnk

A ball of mass 0.25kg is whilred around in a horizontal circle on the end of a string of the length 0.03m, and completes 5 revolutions per second

what is the angular velocity of the ball?

is it right to use

angular velocity = 2 pi F

giving me a answer of 31.4 ms

2. Aug 12, 2011

SteamKing

Staff Emeritus
What are units of angular velocity?

3. Aug 12, 2011

Lobezno

The angular velocity (usually denoted omega, lower case) is equal to (2*Pi)/T

Where T is equal to the period in seconds. The units for angular velocity are thus not metres per second, but radians per second.

Multiplying omega by r (radius) gives velocity in metres per second. Or, if you want to be precise and since the velocity is vectorial, but changing direction, you get speed.