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Hockey puck A initially travels at  v(initial) = 6.2 m/s in the horizontal direction (East) on a smooth horizontal ice before striking hockey puck B which is initially at rest, off-center.  After the collision, A is deflected at θ =  23 degrees 'above' its original direction, while puck B is deflected at α = 30.7 degrees 'below' the original direction of puck A.  The pucks have the same mass.

What is the speed of puck A after the collision?

What percentage of the initial kinetic energy of the system is converted to other forms (i.e. dissipated) during the collision? (Note: you will need to determine the final speed of the other puck B first.)

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