A billiard ball of mass 1.5 kg is moving in the +y-direction at 2.0 m/s and collides with a second billiard ball of mass 2.5 kg moving along in the –x-direction at 2.2 m/s. They collide. After the collision, the 1.5 kg ball moves at an angle of 50 degrees below the –x-axis and the 2.5 kg ball moves at an angle of 40 degrees above the –x-axis. Find the speed of each ball after the collision.

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.