# Homework Help: Circular kinematics question

1. Oct 9, 2009

### rottweiler

1. I have a circular kinematics question that I am not sure how to solve part of. I have a radius of.27m, and the wheel rotates three full circles a second. The first part of the question asked me to solve for velocity and I got 5.09m/s. I have to find acceleration in m/s^2. I am not allowed to use degrees only radians.

2. The four kinematics equations rearranged for polar coordinates.

3. Part one was ((2*Pi*3*27m)=5.09m/s I am not sure how to proceed with the acceleration[/b

2. Oct 9, 2009

### rock.freak667

Do you know the equation governing centripetal acceleration?

3. Oct 12, 2009

### rottweiler

(V^2)/r but that would make the acceleration 96.0 m/s^2 isn't that a large acceleration?

Last edited: Oct 12, 2009
4. Oct 12, 2009

### rock.freak667

yes that is what it would be, but you must realize that it is making 3 revolutions in 1 second. which is quite fast.

5. Oct 12, 2009

### rottweiler

Thank you so much!