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Series of True or False questions related to Forces and FBDs

  1. Sep 21, 2015 #1
    1. The problem statement, all variables and given/known data

    True or False (Rope does not stretch and is massless):

    1. A person sits on top of a suitcase, which is_on the floor. The magnitude of the normal force of the floor on the suitcase is equal to the weight of the suitcase.
    2. A bucket of milk is being pulled directly up at a constant speed (by a rope). The magnitude of tension in rope will be less than the magnitude of the weight (of the bucket of milk).
    3. A person is sliding down a vertical rope attached to the top of the gym. the person's speed is decreasing. The magnitude of tension in the rope will be less than the magnitude of the person's weight.
    4. A person pulls up on the handle of a suit-case which is on the floor but the person is unable to lift it. During his effort to pull, the magnitude of the normal force of floor on the suitcase is less than the weight of the suitcase
    5. A person is climbing up a vertical rope attached to the ceiling. Their speed is increasing. The FBD is correct: sMexIyV.gif

    2. Relevant equations


    3. The attempt at a solution

    1. False, Fn suitcaseonman > W suitcase

    2. False, Fn = W

    3. False, Fn > mg-ma

    4. True, Fn < W

    5. False, the W component should be less than the T component

    This what I believe and I'm not sure whether I'm right or wrong and I'm practicing for a test and this was on a practice. Could anybody here verify my answers and/or correct them? Thanks!
     
    Last edited: Sep 21, 2015
  2. jcsd
  3. Sep 21, 2015 #2
    Everything seems kosher.
     
  4. Sep 21, 2015 #3
    And it was. Thanks for the confirmation.
     
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