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Finding Kinetic energy

  1. Mar 27, 2014 #1
    1. The problem statement, all variables and given/known data

    If the velocity of a rocket is 10 meters per second and its mass is 10 kg, its kinetic energy is:

    a. 5000 joules
    b. 500 joules
    c. 10000 joules
    d. 1000 joules

    2. Relevant equations[/b)

    Ek= (1/2) mv2

    3. The attempt at a solution

    E=5000 j
  2. jcsd
  3. Mar 27, 2014 #2

    Doc Al

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    Staff: Mentor

    Good. I assume you mean: Ek= (1/2) mv2

    Check your arithmetic.
  4. Mar 27, 2014 #3
    Thank you, I appreciate that. Im having a hard time figuring out how to put in the right formulas for this site.

    But doing it again, I got 500 j. That right?
  5. Mar 27, 2014 #4

    Doc Al

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    Staff: Mentor

    Yep! :thumbs:
  6. Mar 27, 2014 #5
    Except that the unit symbol must be J - not j.
  7. Mar 27, 2014 #6


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    Staff: Mentor

    There is an entry in the PF FAQ thread (in the Feedback forum) that describes how to write the mathematical equations here:


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