average mass of a rubber stopper in kilograms
Homework â Circular Motion 1. A 0.013 kg rubber stopper is attached to a 0.93 m length of string. The stopper is swung in a horizontal circle, making one revolution in 1.18 seconds. Find the speed of the stopper, the centripetal acceleration of the stopper, and the force the string exerts on the stopper. 1.18sec 2 2 (0.93m) T r v S S = 4.95 m/s m m s r v a c 0.93 (4.95 / )2 = 26.35 m/s 2 (0.013 )(26.35 / 2) 2 ma kg m s r mv F c =0.34 N 2.