dessyj1
  • dessyj1
Collision question. (picture in comments)
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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dessyj1
  • dessyj1
IrishBoy123
  • IrishBoy123
conservation of momentum you should show where you have got to. in the y direction, it should all add up to zero, both before and after the collision.
dessyj1
  • dessyj1
There would be conservation of kinetic energy as well, right?

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dessyj1
  • dessyj1
|dw:1449796231214:dw|
dessyj1
  • dessyj1
Since it is elastic I feel like there needs to be conservation of kinetic energy, but kinetic energy is not direction specific. So, I do not really know what final velocity I am solving for.
IrishBoy123
  • IrishBoy123
for preservation of KE, you can say that \(\dfrac{1}{2}2(80)^2 = \dfrac{1}{2}2v_1^2+ \dfrac{1}{2}5v_2^2\) so you have 3 equations in 3 unknowns and you can solve
dessyj1
  • dessyj1
These three equations?
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dessyj1
  • dessyj1
Retake
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dessyj1
  • dessyj1
I only have two unknowns, but three equations

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