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Homework Help: Kinetic energy and momentum

  1. Nov 17, 2012 #1
    1. The problem statement, all variables and given/known data
    A car (of constant mass) doubles its kinetic energy while driving down a hill sloped at 45º. The factor by which its momentum changes is answer is 1.4?
     
  2. jcsd
  3. Nov 17, 2012 #2

    Doc Al

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    Staff: Mentor

    Yes. The factor is √2 ≈ 1.41
     
  4. Nov 17, 2012 #3
    Would u get how u got that?

    1/2mv^2 = P right?
     
  5. Nov 17, 2012 #4

    Doc Al

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    Staff: Mentor

    [tex]{KE}_1 = 1/2 m v^2_1[/tex]
    [tex]{KE}_2 = 2 {KE}_1[/tex]
    Find v2 in terms of v1.
     
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