Question

An astronaut, of total mass 85.0 kg including her suit, stands on a spherical satellite of mass 375 kg, both at rest relative to a nearby space station. She jumps at a speed of -2.56 m/s directly away from the satellite, as measured by an observer at the station. At what speed does that observer measure the satellite traveling in the opposite direction

Answer 1

momentum is conserved

85.0 * 2.56 = 375 * v