Science Y 5-6 Elastic Potential Energy

Which one of the stretched springs will have a smaller elastic potential energy? The one on the right or the one on the left?

Of the 3 compressed springs, which one has the greater elastic potential energy? The lone on the left, the one in the middle or the one on the right?

When the spring is extended to 2cm's , what is the force?

Will a compressed spring have elastic potential energy? Yes or no?

At which point will the rollercoaster have the highest gravitational potential energy? W, X, Y or Z?

What force of the earth effects gravitational potential energy?

Look at the diagram and state if is true OR false.

Will a stretched spring have elastic potential energy? Yes OR no?

When a spring is at rest, does it have elastic potential energy?

When the spring is showing a force of 8N, what is its extension in cm's?