A small ball of mass m is aligned above a larger ball of mass M = 0.63 kg (with a slight separation, as with the baseball and basket ball of Fig. ), and the two are dropped simultaneously from a height of h = 1.8 m. (Assume the radius of each ball is negligible relative to h.) (a) If the larger ball rebounds elastically from small ball rebounds elastically from the larger ball, what value of m results in the larger ball stopping when it collides with the small ball ? (b)What height does the small ball then reach ?

Answer

(a)0.21 kg ; (b) 7.2 m