Examples
- A child pushes a toy cart with wheels across the floor and finds it much easier than pushing a box without wheels.
- A farmer uses a wheel-powered cart to bring vegetables from the fields to the market instead of walking all the way.
- A group of people uses logs as rollers, but when they put them on a cart, it rolls smoothly.
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See also
- How Did the Pyramids Stay Standing for Thousands of Years?
- Why Did the Roman Empire Fall?
- How Does the Ancient Roman Calendar Work?
- How Did Ancient Civilizations Count Without Numbers?
- How Do We Know What People Thought Long Ago?
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Categories: History · invention,transportation,ancient history