Here's why:
* Wedges are inclined planes that are used to split or separate objects. They work by concentrating force over a smaller area, creating a greater pressure.
* Fastening can be seen as the opposite of splitting - you are using force to bring two things together.
* Examples: Nails, screws, and staples are all wedges that use the same principle to fasten things together.
Let me know if you have any other questions about simple machines!
