Kyle is swinging at the playground. as he moves from the top of the swing to the bottom he will a. gain potential energy and lose kinetic energy b. lose potential energy and gain kinetic energy c. change potential energy into mechanical energy d. change kinetic energy into mechanical energy need

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?