in a billiards game, the white cue ball hits the black ball, moving the black ball to the right while the cue ball moves to the left. if the action force is applied by the cue ball to the black ball, which force is the reaction force?

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?