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B Would momentum be conserved?

  1. Mar 28, 2016 #1
    Would momentum be conserved on a cart if in one situation it is on an incline and the other it is on a flat surface(assuming it is pushed)

    I am confused because I thought that since gravity is an internal force, it is a conservative force. But then the final velocity of the cart would be higher. Please help I'm in high school who's struggling in physics
     
  2. jcsd
  3. Mar 28, 2016 #2

    Doc Al

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    Staff: Mentor

    As far as the cart is concerned, gravity is an external force. Momentum of the cart will not be conserved. (Total momentum of the cart plus incline/earth will be conserved. In that system, gravity is an internal force.)
     
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