any magic trick will do as long as it involves science..find a magic trick online and explain how it works. please help! I’ve been stuck on this for 8 weeks. if its better add me on snap (amber113312) im begging someone to help plz

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.