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Homework Help: Calculate velocity using work and energy - Mechanics Dynamics

  1. May 22, 2012 #1
    1. The problem statement, all variables and given/known data

    A wagon having a total mass (including its wheels) of 1000 kg, has four wheels each of mass 100 kg and each having a radius of 0.5 m and a radius of gyration of 0.45 m. The wagon starts from rest at the top of an incline of 1 in 10 (sine). If there is a resistance to motion (assumed constant) of 50 N, determine the velocity of the wagon after it has moved a distance of 300 m.


    2. Relevant equations

    1/2*m*v^2
    1/2*Iω^2

    3. The attempt at a solution

    No idea how to start, sorry.
     
  2. jcsd
  3. May 22, 2012 #2

    tiny-tim

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    Homework Helper

    hi mm391! :smile:

    (try using the X2 button just above the Reply box :wink:)

    start by finding the formula for the kinetic energy of the wagon (and wheels) at speed v …

    what is it? :wink:
     
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