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 middle of its motion And can you explain why

Some energy is stored in the spring, since it is stretched to some degree; that is, there is some potential energy in the spring. Some energy is stored in the gravitational field, since the object is lifted above ground; that is, there is some potential energy due to gravity. The mass has reached its maximum speed; so, the kinetic energy of the mass is at a maximum