1. The problem statement, all variables and given/known data There is a spinning disc. Object A sits R distance from center and object B sits R/2 distance away. VB=piR/T and VA=2piR/T 2. Relevant equations Find the magnitude of the acceleration of object B. Assume that the cylinder makes one complete turn in a period of time . 3. The attempt at a solution The answer is a=(2pi2R)/T2 . From using centripital acceleration=v2/R , i got ac=pi2R/T2 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?