A 129-kg astronaut (including space suit) acquires a speed of 2.90 m/s by pushing off with her legs from a 1900-kg space capsule. use the reference frame in which the capsule is at rest before the push.
If the push lasts t = 0.490s , what is the average force exerted by each on the other? As the reference frame, use the position of the capsule before the push.
