The Moon’s craters are remnants of meteorite collisions. Suppose a fairly large asteroid that has a mass of 5.15× 1012 kg (such an asteroid is about a kilometer across) strikes the Moon at a speed of 13 km/s relative to the Moon. At what speed, in meters per second, does the Moon recoil after the perfectly inelastic collision? The mass of the Moon is 7.36 × 1022 kg?
