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## Homework Statement

There is a spinning disc. Object A sits R distance from center and object B sits R/2 distance away. V

_{B}=piR/T and V

_{A}=2piR/T

## Homework Equations

Find the magnitude of the acceleration of object B. Assume that the cylinder makes one complete turn in a period of time .

## The Attempt at a Solution

The answer is a=(2pi

^{2}R)/T

^{2}.

From using centripital acceleration=v

^{2}/R , i got

a

_{c}=pi

^{2}R/T

^{2}

There is a coefficient of 2 that I am missing in my answer from the correct solution, but I have double checked. Am I using the wrong formula here? where did the 2 come from in the answer?