The stubborn car

pcontrolrxcThink of a way to design and construct the stubborn car: a car that will always return to its original place no matter how far it is rolled away from its starting point.

Tip: How can you track the rotary motion of the car’s wheels?

This challenge provides a great introduction to the idea of a proportional control.


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The Tufts Center for Engineering Education and Outreach (CEEO) in Boston, Massachusetts, is dedicated to improving engineering education in the classroom, from Kindergarten to college. The Center houses faculty, staff, and graduate students from engineering disciplines and the education department.

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