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Homework Help: Conservation of Momentum, again :/

  1. Mar 23, 2010 #1
    1. The problem statement, all variables and given/known data
    Valentina, the Russian Cosmonaut, goes outside the ship for a spacewalk, but when she is floating 15m from the ship, her tether catches on a sharp piece of metal and is severed. Valentina tosses her 2.0kg camera away from the spaceship with a speed of 12m/s.
    a.) How fast will Valentina, whose mass is now 68kg, travel toward the spaceship?
    b. Assuming the spaceship remains at rest with respect to Valentina, how long will it take her to reach the ship.

    2. Relevant equations
    Not sure.

    3. The attempt at a solution
    Not sure.
  2. jcsd
  3. Mar 23, 2010 #2
    Part a is no different than the one about the skaters. The camera and the astronaut
    will go in opposite directions, so their momentums will have an opposite sign.

    b. Valentina moves with constant speed after throwing the camera.
  4. Mar 23, 2010 #3
    Thank you, I'll return with my calculations shortly. :)
    Just one question, how will I determine her initial velocity? I am not given her velocity, but only her distance.
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