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Net impulse and what objects exerts force

  1. Mar 19, 2014 #1
    1. The problem statement, all variables and given/known data
    You are riding in a car that crashes into a solid wall. The car comes to a complete stop without bouncing back. The car has a mass of 1500 kg and has a speed of 30 m/s before the crash. (this is about 65 mi/hr).

    What is the net impulse that acts on the car to bring it to a stop? What is the net impulse that
    acts on you to bring you to a stop?

    What object exerts the force that causes the impulse that brings the car to a stop? What object
    exerts the force that causes the impulse that brings you to a stop?

    2. Relevant equations



    3. The attempt at a solution
    I'm not to sure how to find the net impulse, Don't i need time?

    Car to a stop= (1500kg) X (30/s)= 45000kg X 65=2925000

    Object exerts force to bring the car to a stop is the wall.
    Object that exerts force to bring me to a stop is the car.
     
  2. jcsd
  3. Mar 20, 2014 #2

    Simon Bridge

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    No. Check the definition of "impulse".
     
  4. Mar 20, 2014 #3
    thanks that really helped.....
     
  5. Mar 20, 2014 #4

    Simon Bridge

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    Sometimes a nudge is all it takes ;)
    Enjoy.
     
  6. Mar 21, 2014 #5

    rude man

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    What happened to the impulse on the driver?
     
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