Astronaut Jennifer's Lifeline to Her Spaceship Comes Loose and She

Multiple Choice

Astronaut Jennifer's lifeline to her spaceship comes loose and she finds herself stranded,"floating" 100 m from the mothership.She suddenly throws her 2.00-kg wrench at 20 m/s in a direction away from the ship.If she and her spacesuit have a combined mass of 200 kg,how long does it take her to coast back to her spaceship?

A) 1000 s
B) 750 s
C) 500 s
D) 250 s
E) 2.50 min