1. The problem statement, all variables and given/known data Two marble spheres of masses 30 and 20 grams, respectively, are suspended from the ceiling by massless strings. The lighter sphere is pulled aside, as shown in the diagram, through an angle of 75° and let go. It swings and collides elastically with the other sphere at the bottom of the swing. a. To what maximum angle will the heavier sphere swing? b. To what maximum angle will the lighter sphere swing? 2. Relevant equations mgh=1/2mv^2 m1v1 +m2v2=m1v1 3. The attempt at a solution I'm actually really not sure on this one. Would you find the velocity of the smaller ball by using mgh=1/2mv^2? Then could I use that velocity in a momentum equation?