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Homework Help: Rolling Staple Gun

  1. Feb 2, 2010 #1
    1. The problem statement, all variables and given/known data
    An assembly line has a staple gun that rolls to the left at 1.0 m/s while the parts to be stapled roll past it to the right at 3.0 m/s. The staple gun fires 10 staples per second. How far apart are the staples?

    2. Relevant equations

    I am lost but I still came up with an answer.

    3. The attempt at a solution

    sq rt of ((1.0 m/s)^2+(3.0m/s)^2)

    I got 3.16 m/s

    So because there are 10 staples per second there are 0.32 meters between each staple.

    PLEASE HELP..Thanks in advance.
  2. jcsd
  3. Feb 2, 2010 #2
    I'm not sure why you took the square root of the sum of two squares. I believe an easy way to do this is to take the frame of the parts. From the parts point of view, the stapler is moving past it a 4 m/s. Since you know the speed the stapler is moving and how fast the stapler shoots, you can find the distance per staple.
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