a ball of mass 1.00kg moves due east at 3.00 m/s. a ball of mass 2.00 kg moves due south at 2.00 m/s. they collide at the origin. after the collision, the 2.00kg mass moves at a velocity of 1.58 m/s at an angle of 71.6 degrees south of east. what is the final velocity of the other ball? does this collision conserve energy?