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Homework Help: Kinetic energy

  1. Jan 7, 2008 #1
    Help i have brain ache, i need to know the kinetic energy at 120 mph ? please can someone help ?
     
  2. jcsd
  3. Jan 7, 2008 #2

    Shooting Star

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    No, because you have not specified the mass. (Don't pass on the headache to us.:smile:)
     
  4. Jan 7, 2008 #3
    Hi all i have to go on is a train doing Normal speed for the X2000 is 200 km/h (120 mph),
     
  5. Jan 7, 2008 #4

    Shooting Star

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    For a mass m moving at speed v, KE = (1/2)mv^2 (in consistent units.)
     
  6. Jan 7, 2008 #5
    Thankyou so much mate. I might be home and dry for your help.
     
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