Physics: a Momentum and Collision

A 0.30-kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.20-kg puck that is initially moving along the x-axis with a velocity of 3.3 m/s. After the collision, the 0.20-kg puck has a speed of 2.0 m/s at an angle of θ = 53° to the positive x-axis.

(a) Determine the velocity of the 0.30-kg puck after the collision.

 (b) Find the fraction of kinetic energy lost in the collision. 

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