A soccer player kicks a ball. According to Newton's third law of motion, the player's foot exerts a force on the ball. The ball exerts a force on the foot. Why don't the forces cancel out to result in a net force of zero?

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?