Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Simple impulse force question - force upon impact

  1. Jun 26, 2012 #1
    Is there a way to calculate the impulse force F if the time of collision is unknown? The only formula I know to calculate this force is F*Δt = m*Δv. Is there a formula that perhaps uses plasticity as a variable instead of time or maybe uses the distance an object moves after a collision? Any help would be greatly appreciated. This is for an engineering project.
     
  2. jcsd
  3. Jun 26, 2012 #2
    I think no. Because the only measurable variables on a colision is the distance, time and mass. The another things are calculated with that.
     
  4. Jun 26, 2012 #3

    HallsofIvy

    User Avatar
    Science Advisor

    You can certainly say that if an object of mass m, with velocity v, collides with a surface and takes time T to stop, then it had average acceleration a= v/T. The (average) force exerted on it by the surface (and so the force it exerts on the surface) is given by f= ma= mv/T.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook