PHYSICS · Subjective · AP · Physics 1: Algebra-based · Linear Momentum · Linear Momentum
Problem
Two identical billiard balls, each of mass 200g, are on a smooth horizontal table. Ball A moves due east with speed 2.0m s−1 and strikes ball B, which is at rest. After the perfectly elastic collision, ball A moves with speed 1.0m s−1 in a direction 60∘ north of east.
(i) Calculate the speed of ball B after the collision.
(ii) Find the angle that the velocity of ball B makes with the eastward direction.