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Shoe Drag lab question

  1. Feb 22, 2010 #1
    I am teaching 7th grade Science.

    We are doing the shoe drag lab. To start we drag a shoe across the floor with a rubber band. Then we add a rock to the shoe and drag it again, measuring the stretch of the rubber band with a ruler.
    My question is: by adding a rock to the shoe, are we adding mass or weight?

    Mike

    P.S. Please help, I have to know the answer before tomorrow morning.
     
    Last edited: Feb 22, 2010
  2. jcsd
  3. Feb 22, 2010 #2
    You are increasing mass.
     
  4. Feb 23, 2010 #3

    berkeman

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    Staff: Mentor

    Which increases its weight.

    EDIT -- Quiz Question: Why?

    (hint: What equation relates mass to the force of weight?)
     
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