Kinetic energy and momentum

  • #1
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Homework Statement


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?
 

Answers and Replies

  • #2
Doc Al
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The factor by which its momentum changes is answer is 1.4?
Yes. The factor is √2 ≈ 1.41
 
  • #3
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Yes. The factor is √2 ≈ 1.41
Would u get how u got that?

1/2mv^2 = P right?
 
  • #4
Doc Al
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[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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