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What mechanical invention did Leonardo da Vinci develop using balls to reduce friction?
Answer
Ball bearing
What battlefield machine did Leonardo da Vinci design to cut through infantry using rotating blades?
Answer
Scythed chariot
What waterway structure did Leonardo da Vinci improve with a sliding gate system?
Answer
Canal lock
What navigation device did Leonardo da Vinci design to measure distance traveled by counting wheel rotations?
Answer
Odometer
What mechanical figure did Leonardo da Vinci design as a seated armored knight?
Answer
Robot knight
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What mechanical figure did Leonardo da Vinci design as a seated armored knight?
Answer
Robot knight