Suppose there are two puck of equal mass. That the first puck moves to the east at a velocity of 3.6 m/s while the second one is at rest. Then there is an elastic collision. The first puck moves at an angle theta north of east with a velocity of 1.3 m/s. The second puck moves south of east at angle phi. What is the angle theta?(adsbygoogle = window.adsbygoogle || []).push({});

I have attempted the problem but haven't gotten it to work out yet. Here is what I did.

Momentum in the x direction:

[tex]v_{1i}=v_{1f}*cos(\theta )+v_{2f}cos(\phi )[/tex]

Momentum in the y direction:

[tex]0=v_{1f}*sin(\theta )+v_{2f}sin(\phi )[/tex]

Consevation of Energy:

[tex]v_{1i}^2=v_{1f}^2+v_{2f}^2[/tex]

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# Homework Help: Two Puck Colliding

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