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Homework Help: What is the kinetic energy?

  1. Jan 26, 2009 #1
    1. The problem statement, all variables and given/known data
    A (n) 1880 kg car travels at a speed of 14.7 m/s. What is it's kinetic energy? Answer in units of J.

    2. Relevant equations

    Kinetic energy= 1/2mv^2

    3. The attempt at a solution
    1/2(188)(14.7)^2= 20312.46
    My answer is wrong though....
    What did i do? I keep getting all the kinetic problems i have wrong and i am following the formula....
  2. jcsd
  3. Jan 26, 2009 #2


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    Homework Helper

    It's supposed to be 1880 kg, you used 188 kg.
  4. Jan 26, 2009 #3
    Ok so now i did .5(1880)(14.7)^2 = 203124.6
    It's still wrong...
  5. Jan 26, 2009 #4
    Why do you say its wrong? Is the answer your comparing it two 203000? or even 200000? It could be sig figs.
  6. Jan 26, 2009 #5
    Ahh i figured it out. I was submitting it in the wrong blank.
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