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Homework Help: Calculate Velocity From Kinecitcal energy

  1. Nov 21, 2005 #1
    I know 4 thing
    Velocity 10m/s KE = 60000
    Velocity 15m/s KE = 135000

    For the next velocity the KE raises antoher 105000

    and the new Velocity = ???? and KE = 240000

    How do I solv the new Velocity...
  2. jcsd
  3. Nov 21, 2005 #2
    Can you find the mass from either of the first two equations? If yes, will that help with your final answer?
  4. Nov 21, 2005 #3


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    well K.E. = 1/2mv^2

    if you knew "m", the rest would be easy
  5. Nov 21, 2005 #4
    if the unit of energy is jule then
    20 m/s

  6. Nov 21, 2005 #5

    Yeah I forgot....the mass is 1200kg please tell me how to do it not only show the answer .....
  7. Nov 21, 2005 #6
    Just plug that info into the K.E formula. You know the Kinetic energy and the mass, now find the velocity.
  8. Nov 21, 2005 #7
    Thx guys had some problems there ...
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