system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are springy doorstops made with maximum compression? Wouldn't they be more effective if they could be compressed to cushion the door's impact?
gpt
The coil is just for flexibility (as others have said). If the spring was not compressed though when the door was pushed into it the spring would compress, absorbing the impact (good), however it would the release this compression, flinging the door back towards the person opening it (bad). The more force the door was opened with potentially the faster the door would be returned towards the opener. This would probably cause a lot of accidents. However you would get some great YouTube compilations.