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Please be clear on which answer is which I got confused on a earlier question. thankss...

Please be clear on which answer is which I got confused on a earlier question. thankss

Two pucks collide on an air hockey table. Puck A has a mass of 30.0 g and is initially traveling in the +x direction at 7.40 m/s. Puck B has a mass of 120.0 g and is initially at rest. After the pucks collide, puck A moves away at an angle of 56.0$^\circ$ above the +x axis, while puck B travels at an angle of 20.0$^\circ$ below the +x axis.
A)Calculate puck A's final speed

B) Calculate puck B's final speed

c) What fraction of kinetic energy was lost in this collision?

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