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## Homework Statement

A bicycle wheel has an angular acceleration of 1.4 rad/s^2. If a point on its rim has a tangential acceleration of 49 cm/s^2, what is the radius of the wheel?

Answer in units of m.

## Homework Equations

a

_{c}=r*a

## The Attempt at a Solution

49 cm/s^2=.49m/s^2

r=ac/a=2.8571

But the answer is wrong, where did I mess up?