A87.0 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. the astronaut turns away to look at earth and several seconds later is 38.1 m behind the ship, at rest relative to the spaceship. the only way to return to the ship without a thruster is to throw a wrench directly away from the ship. the wrench has a mass of 0.570 kg, and the astronaut throws the wrench with a speed of 22.4 m/s. how long does it take the astronaut to reach the ship?