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Homework Help: Work/Energy physics problem

  1. May 7, 2008 #1
  2. jcsd
  3. May 8, 2008 #2


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    Hi Jason03,

    The term you have for the gravitational energy is not correct. Do you see why?

    (I think you might also want to recalculate the frictional work term.)
  4. May 8, 2008 #3
    For gravitational energy do you mean the mgh on the right side of the equation?....I have mgx which could be a problem but im not sure.

    And for frictional work U 1-2 = -Friction*distance

    so I did Kinetic Friction * Normal Force * distance x
  5. May 8, 2008 #4


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    What is the h in that equation, and what does the x you have represent? How can you write h in terms of x?
  6. May 8, 2008 #5
    i just did h = x sin 25 and I came up with x = 2.3 and the book has x = 2.28

    so now i have to figure the velocity and total frictional work
  7. May 8, 2008 #6
    got it all figured out...thanks for the help!
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