Right!

• The system now has both elastic (spring) and gravitational potential energy.
• The spring energy goes down, just like before, but the gravitational potential energy goes up as the toy rises.
• With the Earth in the system, there are no external forces doing work on it.
• Since the system is closed, and no external forces do work on it, its total energy must be conserved, so the increase in gravitational potential energy must equal the decrease in spring potential energy.

Go back if you want to look at the original diagram for the toy only.

Go back if you want to look at the choice of diagrams for this choice of system.

Good job! You may go on to the next question.