Homework Help: Angular position, speed, and acceleration

1. Apr 24, 2009

aaronb

1. The problem statement, all variables and given/known data
A dentist's drill starts from rest. After 3.30 s of constant angular acceleration, it turns at a rate of 2.52 multiplied by 104 rev/min.

Find the drill's angular acceleration.

Determine the angle through which the drill rotates during this period

2. Relevant equations
$$\omega$$f=$$\omega$$i+$$\alpha$$t
$$\vartheta$$f=$$\varthetai$$+$$\omega$$it+(1/2)$$\alpha$$t2
3. The attempt at a solution

2.52x10^4=0+$$\alpha$$3.3=7636.36
$$\vartheta$$f=0+0+1/2=4150

I know the answers are in the wrong units so can someone tell me what to do change my rev/min into rad/s2 for the first part and to find rad for the second part?

Last edited: Apr 24, 2009
2. Apr 24, 2009

LowlyPion

3. Apr 24, 2009

aaronb

Thanks for the link LowlyPion it helped me a lot.