11. Momentum & Impulse
Push-Away Problems
Multiple Choice
Multiple ChoiceAn 80-kg astronaut is stranded floating in space is 30 m away from his spaceship. He wants to return to his spaceship in 20 s. How fast must he throw his 2-kg space hammer, directly away from the spaceship, to accomplish this?
A
40 m/s
B
120 m/s
C
240 m/s
D
60 m/s
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