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Homework Help: How to find Coeff of kinetic friction without mass?

  1. Jan 9, 2017 #1
    1. The problem statement, all variables and given/known data
    For my Physics lab this is what my teacher handed me... I have no idea how to attack the situation, can someone help solve?
    Devise a procedure for an experiment which will measure the coefficient of kinetic friction between a block of unknown mass m and the table, where the only equipment which can be used is the following:
    1) A string of negligible mass
    2) two blocks of unknown identical masses which are able to be attached to string
    3) a pulley
    4) measuring tape(s)
    Derive an expression for the coefficient of friction between the table and the block in terms of g and quantities measured with the equipment above.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jan 9, 2017 #2


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    Science Advisor
    Homework Helper
    2017 Award

    Hello Pierce, :welcome:

    First post on PF and you bump into a culture issue: the guidelines require an attempt on your part.
    List the equations that you think are relevant,
    Describe some experiments that would help you determine relevant variables, etc.

    And don't worry: mass might well divide away and thus drop out of the calculations.
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