A jetliner rolls down the runway and lifts off the ground at a 8 degree angle with the ground at a velocity of 240 km/hr. What is the land speed (x) of the aircraft? How fast is it rising into the air for altitude(y)?

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.