Wheel and Axel
Most experts believe the ancient Mesopotamians invented the wheel about 3500 BC. ... The Inca and Maya had wheels on children's toys around 1500 BC, but they did not use wheels for work. Africa south of the Sahara desert, Europe, and Australia did not have the wheel until people there met people from other cultures.
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Using the design shown above create and build your own race car that you will enter into a classroom car race.
The Trebuchet
What simple machines are used in the creation of this trebuchet?
