1. The problem statement, all variables and given/known data Basically, we did a centripetal acceleration lab where a hanging mass(s) was connected to a string, run through a tube, and connected to a rubber stopper. The force of gravity of the hanging mass is what supplied the force of tension to the rubber stopper for its centripetal acceleration. This is a picture of the lab: http://dev.physicslab.org/img/1efa676f-ede0-44dd-ae03-ad06a6e14b18.gif 2. Relevant equations mass of hanging mass x force of gravity=mass of rubber stopper x 4(pi)^2(r)(f)^2 3. The attempt at a solution I understand that because the force of gravity was acting on the rubber stopper, the actual radius of the circle swung would be less than the assumed radius, which is supposed to be constant, and therefore the experimental frequency would be greater than the theoretical frequency. However, why would increasing the weight of the hanging mass reduce this problem?