1. The problem statement, all variables and given/known data A computer is reading data from a rotating CD-ROM. At a point that is 0.030 m from the center of the disc, the centripetal acceleration is 118 m/s2. What is the centripetal acceleration at a point that is 0.050 m from the center of the disc? 2. Relevant equations Ac=v^2/r-centripual acceleration possibly v=2pier/T 3. The attempt at a solution Aa=Va^2/Ra Ab=Vb^2/Rb substituted Va=1.667*r*a, 1.667*ra<<<1.667 I got by dividing .050m/.030m to get the ratio of the radius' I set up the equations like this: 118^2/.5^2=(1.667*118 m/s^2*V)^2/(1.667*.30) >>crossed multiplied .25(196.706V)^2=13924(.5001) solved for V and got V=.720<<<this is wrong I think I'm on the right track I think theres an error on the way I set up my equations before substituting in the numbers.