# Angular velocity

1. Jul 30, 2005

### marissa12

a disk is 8.0 cm in diameter. A reference dot on the edge of the disk is initially located at theta =45 . The disk accelerates steadily for 1/2 second, reaching 2000 rpm, then coasts at steady angular velocity for another 1/2 second. What is the speed of the reference dot at t=1

ok so you need to use v=omega*radius

and omega=2000rpm? im not sure if someone could help me out with that i should be able to solve it

2. Jul 30, 2005

### KingOfTwilight

Yes, you're right, omega = 2000 rpm. Just convert that into SI.