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## Homework Statement

Two 72.0 kg hockey players skating at 5.45 m/s collide and stick together. If the angle between their initial directions was 115[tex]^{o}[/tex], what is their speed after the collision?

## Homework Equations

p = mv

[tex]p_{i} = p_{f}[/tex]

## The Attempt at a Solution

Here's my interpretation of the image;

http://img696.imageshack.us/img696/1493/momentum.png [Broken]

[tex]p_{ix} = p_{fx} = 0[/tex]

[tex]p_{iy} = p_{fy}[/tex]

[tex]m_{A}v_{A} + m_{B}v_{B} = (m_{AB})(v_{AB})[/tex]

[tex](72)(5.45cos(32.5)) + (72)(5.45cos(32.5)) = 144v_{AB}[/tex]

[tex]v_{AB} = 4.60 m/s[/tex]

Am I correct?

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