Why is the law of gravity an example of a universal law? a) gravity is the attraction of any mass to any other other mass . b) gravity is a force that affects everyone on earth c) gravity is the reason the earth revolves around the sun d) gravity is a force that exist between any two masses in the universe

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.