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3. A ball of mass 2.00 kg, resting on a horizontal frictionless surface, gets hit by...

3. A ball of mass 2.00 kg, resting on a horizontal frictionless surface, gets hit by another ball of mass 1.50 kg moving in the +x-direction with a speed 4.00 m/s. After the collision, the 1.50 kg ball has a speed of 2.00 m/s at an angle 60.0° counterclockwise from the +x-direction. a) Find the velocity of the 2.00 kg ball just after the collision. Express your answer in vector form. b) Compute the percent of kinetic energy lost in the collision.

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