Hammer
device · 30000 BC · Stone Age
A striking tool.
What it is made of
- Hammer head — has part. The striking part.
- Handle — has part. A handle.
- Handle wedge — has part. It wedges the handle in the eye.
Principles and materials it uses
- Lever — uses. The handle lengthens the arm of the blow.
- Stone — is made of. The first hammer was a hammerstone, later mounted on a handle.
- Wood — is made of. The handle of a hammer is wooden.
History: what it evolved from and what it influenced
- Stone tool — evolved from. The first hammer was a stone in the hand.
- Trip hammer — evolved into. A trip hammer is a hammer lifted and dropped by a water wheel.
- Steam hammer — evolved into. A steam hammer is a hammer lifted by steam, used to forge huge parts.
What it is a kind of
- Reflex hammer — includes. A hammer.