Battering ram
device · 900 BC · Ancient world
A log for breaking down gates.
What it is made of
- Iron-capped battering log — has part. A heavy log with a metal-clad head.
- Chains for swinging — has part. Chains or ropes for swinging.
- Protective roof — has part. A roof that protects the crew.
Principles and materials it uses
- Newton’s laws — uses. The momentum of a heavy log.
- Wood — is made of. A ram is a heavy log.
- Iron — is made of. With an iron head.
What it is a kind of
- Combat vehicle — is a kind of. A siege engine.
Things built in a similar way
- Pile driver — works like. A battering ram and a pile driver both strike with a heavy weight: one breaks gates, the other drives piles.