Which two objects have stored energy?

1.a ball rolling on the ground

2.a small rock sitting on top of a big rock

3.a stretched rubber band

4.a stone lying on the ground

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v