Elastic Collision shuffleboard problem

AI Thread Summary
In the discussion about the elastic collision of shuffleboard pucks, the problem involves a moving puck colliding with a stationary puck of equal mass, with negligible friction. The key equations derived include the conservation of momentum in the x-direction and the y-direction, leading to two equations. The participant expresses confusion about applying the concepts of conservation of momentum and kinetic energy effectively. Guidance is provided to split the kinetic energy conservation into x and y components, similar to the momentum approach. The discussion emphasizes the importance of correctly applying both conservation laws to solve for the post-collision speeds of the pucks.
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Homework Statement



A moving shuffleboard puck has a glancing collision with a stationary puck of the same mass. If friction is negligible, what are the speeds of the pucks after the collision?
http://img179.imageshack.us/img179/277/phyqp2.jpg

The Attempt at a Solution


I ended up with this:
0.95 = Vx1*cos50 + Vx2*cos40
and
0= Vy1*sin50 - Vy2*sin40

--
I know that both momentum and energy are conserved in elastic collision but I got no idea how to actually apply the concept. I think I'm looking too much into it and missing something simple. Thanks
 
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You can apply it in a similar way to the way you used conservation of momentum. What is the equation for conservation of kinetic energy? Split this up into x and y components ike you did with the momentum.
 

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