# Angular velocity problem

1. Nov 24, 2009

### vm310

A machine rotates at an angular velocity of 1.6rad/s. Its velocity is then increased to 6.2rad/s at an angular acceleration of 0.7rad/s2. (a) How many revolutions does it make during its acceleration? (b) How long does the acceleration take?

Sorry I'm not quite sure as how to approach this problem, and I don't even know where to begin. Any advice would be greatly appreciated.

2. Nov 24, 2009

### TVP45

Do you know any equation that relates revolutions, angular velocity, angular acceleration, and time? Can you then show some work? Thanks.

3. Nov 25, 2009

### vm310

aright i got it thanks! i used:

$$\omega$$=$$\omega$$0+$$\alpha$$t

and

$$\theta$$=$$\theta$$0+$$\omega$$0+$$\frac{1}{2}$$$$\alpha$$t2