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How much force pull forward on the rope

  1. Sep 26, 2007 #1
    1. The problem statement, all variables and given/known data

    A 2m long, 600g rope pulls a 10kg block of ice across a horizontal, frictionless surface. The block accelerates at 1.7m/s^2. a.) How much force pulls forward on the ice? b.) How much force pull forward on the rope.

    2. Relevant equations



    3. The attempt at a solution
    I solved part a by using T=m(Ax). I got 17N. I'm having trouble solving part b.
     
  2. jcsd
  3. Sep 26, 2007 #2

    Dick

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    Word to the wise, Newton's third law.
     
  4. Sep 26, 2007 #3
    I tried that already, and it didn't work.
     
  5. Sep 26, 2007 #4

    Dick

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    You didn't include the force needed to accelerate the rope in addition to the block of ice.
     
  6. Sep 26, 2007 #5
    And how do I do that?
     
  7. Sep 26, 2007 #6

    Dick

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    Add the mass of the rope to the mass of the ice. Whatever is pulling has to pull both.
     
  8. Sep 26, 2007 #7
    That worked. Thank you!
     
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