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Applying physics to a Bear Sling

  1. Jan 23, 2010 #1
    1. The problem statement, all variables and given/known data

    A set of pulleys are 9.64 meters apart and are located 4.25 meters above the floor. John, the young man, applies a tension force by applying his 85kg body weight to lift the backpack in the middle of the two pulleys. The backpack has a mass of 22.4 kg.

    What is the tension force when John puts all of his weight on the rope?

    What is the sag in the rope when John puts all of his weight on the rope?

    How high above the ground is the 24 kg backpack located?

    What amount of tension must be in the rope to place the backpack at exactly 4 meters high.

    2. Relevant equations

    Tf = mg


    3. The attempt at a solution

    What is the tension force when John puts all of his weight on the rope?
    =(85 * 9.8)
    = 833N

    What is the sag in the rope when John puts all of his weight on the rope?
    ?
    How high above the ground is the 24 kg backpack located?
    ?
    What amount of tension must be in the rope to place the backpack at exactly 4 meters high.
    ?


    Thanks in advanced!!
     
  2. jcsd
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