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Finding the vertical force?

  1. Apr 26, 2016 #1
    1. The problem statement, all variables and given/known data
    Fireman weighs 100kg. He slides down a vertical pole with acceleration 3.0ms^-2.

    a) Magnitude and direction of vertical force exerted by the pole on fireman?

    2. Relevant equations
    f=ma

    3. The attempt at a solution
    f=ma
    f=100(3.0)
    f=300N vertically up.

    But the answer says that it is actually 680N vertically up, and I do understand how they came to this conclusion.
    Can you please explain where to go beyond this point? Or point out a mistake I may have made? Thank you.
     
  2. jcsd
  3. Apr 26, 2016 #2

    gneill

    User Avatar

    Staff: Mentor

    The acceleration of a mass depends upon the net force acting on the mass. Draw a free body diagram and identify all the forces that are acting on the fireman. How do the acting forces combine to make up the net force?
     
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