An object is moving across a surface, but it does not gain or lose speed. Which best describes the object’s force? The net force is positive. The net force is zero. The positive force is greater than the negative force. The negative force is greater than the positive 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?