Question

Students in Mr. Paulson's class are asked to design a device that uses elastic potential energy to launch a water balloon into the air.
The class comes up with several different ideas. Which of the following ideas for getting a water balloon into the air uses elastic potential energy?
launching it with a small rocket that is powered by a chemical reaction

launching it from a large slingshot that is made with rubber bands

rolling it down a very tall ramp until it hits the ground

launching it from one end of a seesaw by jumping on the other end