uniform circular motion of a rolling object

[akatsafa]

A soccer ball of diameter 33cm rolls without slipping at a linear speed of 2.4m/s. Through how many revolutions has the soccer ball turned as it moves a linear distance of 18m?

How do I just find the revolutions? I know how to use the equation to find rev/s, but how do I just get revolutions?

Thank you.

[e(ho0n3]

Find out how long it takes for the ball to do a full revolution. Then find out how long it takes for the ball to move 18 metres. Divide the latter by the former and you should get your answer.

[turin]

hint: there is superfluous information in the problem.

[akatsafa]

I'm using the equation N=X/2pi*r. When I do this, I'm getting 8.68 revolutions, but it's wrong. Is there another equation I should be using?

[akatsafa]

Nevermind. I know what I did wrong!!

[Doc Al]

I'm using the equation N=X/2pi*r. When I do this, I'm getting 8.68 revolutions, but it's wrong. Is there another equation I should be using?
Your equation is correct. Be sure you are using the correct value for the ball's radius.