If there were no energy lost to friction in a pendulum, then the pendilum bob would

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

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?