# Centripetal Acceleration HELP

Sucks@Physics
What is the centripetal acceleration of a point on the perimeter of a bicycle wheel of diameter 70 cm when the bike is moving 7.0m/s?

I thought the formula was v^2/r =ac

But when I do that i get 1.4m/s^2 and it is not the right answer. Can someone tell me what I'm doing wrong, or if I've used the wrong formula? Thanks

Mentor
Realize that the diameter is given in cm. Change to meters.

Sucks@Physics
I did. (7m/s)^2/.35m = 140m/s

Sucks@Physics
Sorry that was supposed to be 1.4x10^2 in the first post

Mentor
Sorry that was supposed to be 1.4x10^2 in the first post
I don't see anything wrong with that answer, assuming you gave proper units.