Tension problem :/

  1. Here's the problem: A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 20.0(degrees) above the horizontal. The sledge moves a distance of 20.0m on a horizontal suface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension of the rope?


    I don't know how to even start this problem, or how to find out what the tension is. Can anybody help me?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. tiny-tim

    tiny-tim 26,054
    Science Advisor
    Homework Helper

    welcome to pf!

    hi mrrocketknigh! welcome to pf! :wink:

    if the speed is constant, then the acceleration is zero, so Ftotal = ma tells us that Ftotal = 0

    so draw all the forces on the sledge, and get them to add to zero …

    what do you get? :smile:
     
  4. What do you mean by "draw all the forces on the sledge and get them to add to zero"? I'm lost.
     
    Last edited: Oct 27, 2010
  5. Re: welcome to pf!

    Wait... is it 0??? I tried doing it myself this whole time, but to no avial...
     
  6. tiny-tim

    tiny-tim 26,054
    Science Advisor
    Homework Helper

    draw a diagram of the sledge, then draw all the forces on it …

    what are they?​
     
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