Apellet gun is shot at a cardboard box of mass m2 = 0.65 kg on a frictionless surface. the pellet has a mass of m1 = 0.0145 kg and flys at a velocity of v1 = 79 m/s. it is observed that the box is moving at a velocity of v2 = 0.43 m/s after the pellet goes through it.1. write an expression for the magnitude of the bb's velocity as it exits the box vf.
2. what is the bb's final velocity vf, in meters per second?
3. if the bb doesn't exit the box, what will the velocity of the box v'2, be in meters per second?