A blue-ball of mas m=3 kg is thrown with an initial speed 0 m/s, at an angle of θ=32.4° above the horizontal. At the same time, a black-ball of mass m=2 kg is dropped from rest. When blue-ball starts the projectile motion, the black-ball is 19.62 m above the ground and starts the free-fall. After 1.3 s later, these two balls stick together after colliding in the air (no air resistance), in the case of perfectly inelastic collision. a) Find the momentum vector after perfectly inelastic collision.
b) When and where do they hit the ground after perfectly inelastic collision?.