system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does double bouncing on a trampoline work?
gpt
When two people jump down onto a trampoline normally, the trampoline stretches with enough energy to launch 2 people back up. This is conservation of energy. To do a double bounce, one person makes their legs limp just when they reach the bottom of the stretch. The limp person suddenly does not provide resistance to the trampoline, which now has the energy of 2 people. As a result, the remaining person who doesn't go limp (ie: does a regular jump on the trampoline) absorbs the total energy. This total energy = two people's energy = bounces twice as high.