An astronaut with a mass of 84.9kg, finds herself 30.2m from her spaceship. The only way for her to return to the ship is to throw her 0.506kg wrench directly away from the ship. If she throws the wrench with a speed of 21.1m/s, how many seconds does it take her to reach the ship? 

Answer rating: 100% (QA)

To solve this problem we can use the conservation of momentum principle The total momentum before the astronaut throws the wrench is equal to the tota... View the full answer