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Building Physical Models

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  1. Feb 17, 2015 #1
    1. The problem statement, all variables and given/known data
    A rectangular 4 x 8 foot sheet of plywood is fixed to a sled which moves on a track. The face of the plywood is perpendicular to the direction of the track. The sled is pushed a distance of 3 inches. What is the volume of air swept out during this motion.

    2. Relevant equations
    None. The problem is stated in its entirety.

    3. The attempt at a solution
    I know that the sides of the rectangle must be converted to inches, so 48 inches and 96 inches respectively. And I know Area = LW, so Area = 4608 inches squared. The next steps are unknown
     
    Last edited: Feb 17, 2015
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  3. Feb 17, 2015 #2

    Dick

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    When that rectangle is pushed forward 3 inches it sweeps out a box shaped volume. They want to know the volume of that box. That's all.
     
  4. Feb 17, 2015 #3
    Oh, wow.

    So the volume of that box would be:

    Length times Width times Height of the box?

    48inches x 96inches x 3inches = 13824?

    13824 is the volume of air that is swept out during this motion?
     
  5. Feb 17, 2015 #4

    Dick

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    Almost. 13824 isn't a volume by itself. You need to put units on it. 13824 what?
     
  6. Feb 17, 2015 #5
    oh right, inches cubed?
     
  7. Feb 17, 2015 #6

    Dick

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    Sure.
     
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