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Trampolines are always a ton of fun, but they're one of those everyday things a lot of people don't really question. it's one of those things people just take as common sense, but what makes them work the way they do from a physics perspective? how is it that they can propel a person so high in the air, and why is it that jumping on one somehow sends a person higher than simply jumping on solid ground? the answer is that on a trampoline, there is an extra force acting on you each and every jump. as one lands from their first jump, the trampoline stretches downward a certain distance, extending springs along the outside. as they jump back up, there is an extra restoring force upward from the springs and trampoline added to the force of the person propelling themselves upward, resulting in a greater height achieved by the jumper. this force increases as the jumper applies more force to the trampoline as it is displaced a greater distance from its equilibrium position. Just jumping on solid ground doesn't get you any higher simply because the ground obviously doesn't move, so any extra downward force you exert might just result in sore feet after a while


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