Everyone loves to jump on trampolines. They are just so much fun! But do you ever think about the physics behind the fun activity? The physics involved in jumping on a trampoline is elastic potential energy. There is elastic potential energy because there are springs all around the trampoline. Elastic potential energy is equal to one-half times the spring constant times the amount of compression squared. To find the spring constant or the amount of compression, you must know the other and the force of the spring and plug it into the spring force equation which is Fs=kx. Once you know both k and x, you can find the amount of energy stored in the springs by plugging them into the elastic potential energy equation. Now you can figure out how much energy is stored in a trampoline before you jump on it!