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Homework Help: Velocity of object and force of resistance.

  1. Feb 8, 2017 #1
    If we have object with mass 10 kg traveling at starting velocity of 50 km/s and one force of resistance that is equal to v^2 of object's velocity how can we calculate distance and time in which that object travels until it gets to velocity of 10 km/s.

    So I was thinking:
    kinetic energy at start - energy lost due to work of resistance = final kinetic energy
    1/2 m v0^2 - ??? = 1/2 m vf^2

    As you can see I have trouble calculating work done by resistance. At start it will be starting velocity squared times distance but it changes every moment as velocity changes...
  2. jcsd
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