If a spring was held down with a mass attached to the bottom and attached to a firm surface at the other Then let go to allow it to beoing up and down What would be the spring potential What would be the gravitational potential energy What would be the kinetic energies of the spring When the spring was at the very BOTTOM of its motion And can you explain why

The potential energy of the spring is at a maximum since the spring is stretched at its maximum extension. The potential energy due to gravity is at a minimum, since the mass is lifted the least amount above ground. In fact, if ground level is imagined at the bottom of the motion, the potential energy due to gravity is zero at this point of the motion. The kinetic energy of the mass is zero, since the mass is temporarily stopped