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Homework Help: Best material to minimize Impulse?

  1. Apr 5, 2012 #1


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    1. The problem statement, all variables and given/known data
    Basically I want to know what material (That I could easily access) would be great to minimize impulse in the following situation:

    A car is placed at the top of a ramp with some angle less than 45 degrees and at its front there is a tracker that measures the amount of force put into the car once it runs into the wall. I can add some material/compound to the front with the dimension 10x15x15 cm where 10 is the dimension in line with the length of the car.

    (Foam is not allowed)

    2. Relevant equations

    p = mv
    J = Ft

    3. The attempt at a solution

    Obviously I know that I need to minimize J (impulse) and maximize t (time), and I've thought of a few materials but I'm looking for any that you may have come across in your life that could help.
  2. jcsd
  3. Apr 5, 2012 #2


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    What do you mean by foam? Could you use sponge?
  4. Apr 5, 2012 #3


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    Sorry, forgot to mention, I'm also not allowed to use a sponge lol.

    All I was told was "no foam or sponges".
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