Abird flies overhead from where you stand at an altitude of 270.0ĵ m and at a velocity horizontal to the ground of 14.0î m/is. the bird has a mass of 2.3 kg. the radius vector to the bird makes an angle θ with respect to the ground. the radius vector to the bird lies in the xy-plane. what is the bird's angular momentum (in kg · m2/s) about the point where you are standing