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

Homework Help: Momentum Change

  1. Mar 10, 2009 #1
    1. The problem statement, all variables and given/known data

    A compact car and a large truck collide head on and stick together (perfectly inelastic collison).

    Which vehicle experiences the larger momentum change?

    Which vehicle experiences the larger acceleration during the collision?

    Explain your answers.

    2. Relevant equations


    3. The attempt at a solution

    I think that the truck has a larger momentum change because, first of all, it is conserved, so p=pfinal-initial

    Assuming the velocities are the same, only the mass should affect the momentum. So thats why I thought the truck has a larger momentum change.

    But I'm not sure..I look at I=Ft and the forces are equal, and so is the time..So would they have equal change in momentum?

    HELP! thanks!
  2. jcsd
  3. Mar 10, 2009 #2
    The truck will carry on in the same direction with modified velocty, whereas the unfortunate car will find itself going backwards. Now which one has suffered the largest change in momentum? acceleration?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook