A mass moves up and down repeatedly on a steel spring. The diagram shows the mass and the spring at different stages of the motion. At which point is the gravitational potential store of the mass at the least energy and at which point is the elastic store of the spring at the greatest energy?
- Aleast: mass moving down; most: mass moving up
- Bleast: mass moving down; most: lowest point
- Cleast: lowest point; most: mass moving up
- Dleast: lowest point; most: lowest point