A billiard ball of mass m = 0.250 kg hits the cushion of a billiard table at an angle of θ1 = 60.0° at a speed of v1 = 27.0 m/s. It bounces off at an angle of θ2 = 71.0° and a speed of v2 = 10.0 m/s.
a) What is the magnitude of the change in momentum of the billiard ball?
b) In which direction does the change of momentum vector point?
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