In outer space rock 1 with mass 5 kg and velocity < 3800 rock 27 2900 2800 > m/s, struck rock 2, which was at rest. After the collision, rock 1's velocity is < 3300 2200 3200 > m/s what is the final momentum of kg m/s 2r Before the collision, what was the kinetic energy of rock 1? Before the collision, what was the kinetic energy of rock 2?