A 8-m-long, 510 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66 kg construction worker stands at the far end of the beam. What is the net torque on the beam

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?