Summary
Mark engineers a ball that dodges anything you swing at it, then explores the physics and sensors that let a moving object 'get out of the way.' It blends motion science with clever design.
Viewer safety
Ages 7+
Made for a general YouTube audience — an occasional mild or bleeped word can slip in, so preview if your classroom bar is strict.
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Teaching resources
Discussion questions
Talk about it
To dodge, the ball must sense an incoming object and move before it arrives. That means measuring motion fast and reacting even faster.
- What does the ball need to detect in order to dodge?
- Why does reaction speed matter so much for a dodging machine?
- What was the hardest engineering problem Mark had to solve?
Quick work-a-long
Vocabulary: sensor, reaction time, motion, design.
Try it: Play a quick game of dodge-the-hand with a partner. How much warning do you need to move in time? Discuss.