Answer:
The time it will take the astronaut to coast back to her ship is 500 seconds
Step-by-step explanation:
Mass of wrench, m₁ = 2 kg
Mass of astronaut with spacesuit, m₂ = 200 kg
Velocity of wrench, v₁ = 20 m/s
Velocity of astronaut with spacesuit v₂
Distance between the astronaut and the ship is 100 m
As linear momentum is conserved



Hence, The time it will take the astronaut to coast back to her ship is 500 seconds