Oar
device · 8000 BC · Stone Age
A lever for rowing.
What it is made of
- Oar blade — has part. The flat part in the water.
- Oar shaft — has part. A long rod.
- Handle — has part. A beater for hand washing.
Principles and materials it uses
- Lever — uses. An oar is a lever pivoting in a rowlock.
- Wood — is made of. Oars were carved from wood.