Sledge
device · 7000 BC · Stone Age
A vehicle on runners.
What it is made of
- Sled runners — has part. They glide over the snow.
- Sled body — has part. A platform.
- Shafts for harnessing a horse — has part. A rod.
Principles and materials it uses
- Friction — uses. Low friction of the runners on snow.
- Wood — is made of. A sled is wooden runners and a deck.