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Math Help - It is a Question!

  1. #1
    maritza
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    It is a Question!

    Astronaut jennifer's lifeline to her spaceship comes loose and she finds herself stranded at a constant 100.0m from the spaceship. She throws her 2.00 kg wrench at 20.0 m/s in a direction away from the spaceship. If she and her spacesult have a combined mass of 200 kg how long does it take her to coast back to her spaceship?
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by maritza
    Astronaut jennifer's lifeline to her spaceship comes loose and she finds herself stranded at a constant 100.0m from the spaceship. She throws her 2.00 kg wrench at 20.0 m/s in a direction away from the spaceship. If she and her spacesult have a combined mass of 200 kg how long does it take her to coast back to her spaceship?
    Conservation of momentum tells us that her velocity is 0.2 m/s (the ratio of
    wrench mass to her mass times the wrench velocity) towards her spacecraft,
    so she takes 100/0.2=500 s to reach the spacecraft.

    RonL
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