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How much kinetic energy to propel an object

  1. Dec 20, 2015 #1
    1. The problem statement, all variables and given/known data
    A Physics textbook weighing 3 kg needs must be launched into a nearby trash can. The velocity necessary to accomplish this feat is 4 meters per second when unleashed in its flight.
    Assume no wind resistance.
    What energy is necessary to accomplish this deed?

    2. Relevant equations
    Kinetic energy = .5 * mass * velocity^2

    3. The attempt at a solution

    .5 * 3 kg * 16 m^2 s^-2 = 24 Joules

    Kosher? Thoughts?
     
  2. jcsd
  3. Dec 20, 2015 #2

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    Looks good here.
     
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