energy changes in system

Question 1

what is the equation for elastic potential energy?

Answer 1

1/2 x spring constant x(Extension) ²

energy =(J)
spring constant= (n/m)
extension =(m)

Question 2

what is the equation for gravitational potential energy?

Answer 2

mass x gravitation field strength x heigh

Mass =
Gravitation field strength =
Heigh =