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Homework Help: Final velocity

  1. Mar 18, 2010 #1
    1. The problem statement, all variables and given/known data
    A car with a mass of 1000 kg traveling with a velocity of 15m/s east collides with a 1200 kg minivan traveling at a velocity of 20m/s north. After the collision the car and the minivan are stuck together. Draw to the scale the final velocity vector of the car and minivan after the crash.
    so like how would i set this up?

    2. Relevant equations
    I got the answer of 17.72 for velocity. But i don't know what to take on after this step. Is this the final velocity?

    3. The attempt at a solution
    Ptotal/mass = velocity
     
    Last edited: Mar 18, 2010
  2. jcsd
  3. Mar 18, 2010 #2

    dx

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    Homework Helper
    Gold Member

    Welcome to PF,

    Have you tried to use conservation of momentum?

    (In future, post your attempt at the problem together with its statement. The rule at PF is that no help should be provided if no attempt is shown.)
     
  4. Mar 18, 2010 #3

    Filip Larsen

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    Gold Member

    Think about what vector property of the cars that are conserved in the (in-elastic) collision and how you may draw these vectors in a diagram.
     
  5. Mar 18, 2010 #4
    1. The problem statement, all variables and given/known data
    A car with a mass of 1000 kg traveling with a velocity of 15m/s east collides with a 1200 kg minivan traveling at a velocity of 20m/s north. After the collision the car and the minivan are stuck together. Draw to the scale the final velocity vector of the car and minivan after the crash.
    so like how would i set this up?

    2. Relevant equations
    I got the answer of 17.72 for velocity. But i don't know what to take on after this step. Is this the final velocity?

    3. The attempt at a solution
    Ptotal/mass = velocity
     
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