# Number of revolutions

1. Oct 1, 2007

### mashawa

arr, i am so confused, is that tangential accelaration?
1. The problem statement, all variables and given/known data
A car starts from rest on a curve with a radius of 110 m and accelerates at 1.20 m/s^2. How many revolutions will the car have gone through when the magnitude of its total acceleration is 2.20 m/s^2?

2. Relevant equations

theta (final)=theta (initial)+omega*(delta)t+(a*(delta)t^2)/2*r

3. The attempt at a solution

i just have no idea how to figure out the time or the distance (or the angle) it takes the car to get from one acceleration to another...

2. Oct 2, 2007

### mashawa

never mind, realized something and somehow solved it...

3. Oct 13, 2007

### feedmeister

I am having trouble with a similar problem like this. Any help? I've been using the formulas but I keep getting weird numbers

Thanks

4. Oct 13, 2007

### bob1182006

feedmeister can you make a new thread please? that way people will know it's your problem since mashawa doesn't need help here anymore.