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Homework Help: Physics question

  1. Oct 19, 2007 #1
    1. The problem statement, all variables and given/known data

    A baseball player of mass 80.0 kg slides into home base. The coefficient of kinetic friction between the player and the ground is 0.610.
    a.) What is the magnitude of the frictional force? (In solving this part of the question draw a free body diagram with all of the forces labelled. Use a rectangle to represent the baseball player. Also, assume the player is moving to the right while sliding.)
    b.) If the player comes to rest after 1.5 s, what must have been the initial speed of the player?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Oct 19, 2007 #2


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    Homework Helper

    can you show your work? where are you getting stuck?
  4. Oct 19, 2007 #3
    i don't even know where to start... like what do i do?
  5. Oct 19, 2007 #4
    <-- Ff (0.610)RECTANGLE(80.0kg)----> Fa(his sliding)

    Fk=mue Fn

    ahha i honestly made up that answer for part a... but the FBD is right (:
  6. Oct 19, 2007 #5
    k i understand that equation but how do i find the average force to find the acceleration in part b?
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