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Homework Help: PHYIsics =Newton's Laws

  1. Oct 4, 2009 #1
    1. The problem statement, all variables and given/known data

    A 1500-kg car is dragged up a 20 degree rough ramp by a tow truck. The coefficient of static and kinetic friction between the car and the ramp are 0.8 and 0.5 respectively. Assume that wheels are locked.

    *Note: picture of a sedan pulled up a ramp with a rope.
    Find the tension in the tow rope:

    a.) Just before car moves up the ramp.
    b.) When the car moves up the ramp at a steady speed of 0.5 m/s.
    c.) When car moves down the ramp at a steady speed of 0.5 m/s.
    d.) The car is pulled up the ramp at an acceleration, a =0.2 m/s^2.

    2. Relevant equations

    Don't nkow i got these .

    3. The attempt at a solution
    mayb i started off with msintheta, so it'll be 15000kgsin20=5130N

    1 a.) T=1600 and t+78.4
    b.) 11946.4
    c.) 4914.25
    d.) 6736.08

    I don' tknow if these answers are right. I'm just not sure on where to start on it. Any help on it is appreciated!
    Last edited: Oct 4, 2009
  2. jcsd
  3. Oct 4, 2009 #2
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