# Homework Help: Angular acceleration

1. Dec 3, 2008

### dr2112

1. The problem statement, all variables and given/known data
wheel rotates w constant acceleration 3.65rad/s2
angular speed is 3.00 rad/s at t=0
a)what angle does wheel rotate between t=0 and t=3.67s?
b)what is angular speed of wheel at 4.1s?

2. Relevant equations
wt+1/2alphat

w=w0+alpha t

3. The attempt at a solution
a=1014.65 degrees
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Dec 3, 2008

### alphysicist

Hi dr2112,

I don't believe this is correct. The final t needs to be squared:

$$\Delta\theta = \omega_0 t + \frac{1}{2}\alpha t^2$$

3. Dec 14, 2008

### dr2112

Ok how is 1.60 m/s^2 for tangential and 8.61 m/s^2 for total acceleration?

4. Dec 15, 2008

### alphysicist

Is this for a different problem, or is there more to the problem in your first post?