From a thread called Learn Engineering:
Includes the description of the Seatbelt video:
- Everybody knows what happens in an accident if you don’t wear a seatbelt. What you see in this accident looks really painful in slow motion. Modern seatbelts are not just mechanisms which arrest your motion; rather. they cleverly allow enough movement to minimise internal injuries and help you land safely on an airbag. In this video, we won’t just learn the working of a seatbelt; we will learn why modern seatbelt mechanisms are designed the way they are. So buckle your seatbelt, and let’s start a design journey.