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Velocity of shopping cart with given energy/work input

  1. Nov 18, 2007 #1
    Steve does 50 J of work to push a 3.0 kg shopping cart out of his way. If the cart started from rest, what was its speed immediately after this push? (Assume there was no friction.)

    Does anyone know how to calculate velocity with just given energy?... is it calculating the kinetic energy?
     
  2. jcsd
  3. Nov 18, 2007 #2

    dynamicsolo

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    What is the kinetic energy of the cart after it's been pushed? How do you find velocity from that?
     
  4. Nov 18, 2007 #3
    since e= mv squared / 2

    50 = 3* v(squared) /2

    100/3 = v ( squared )

    33.33 root = v

    5.8 m/s = velocity?...

    it this right?
     
  5. Nov 18, 2007 #4

    dynamicsolo

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    That looks good!
     
  6. Nov 18, 2007 #5
    thank you sir,, have great night
     
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