Propeller counter
Inventors (Intermediate), mission I5 Wheels & Measuring, lesson 2 of 6.
Hook
Here the wheels drive the propeller. Can we count one to measure the other?
Fair test
Push the car 1 m. Count propeller spins. How many per metre?
Bonus challenge
Stick a paper streamer on the propeller for a “speedometer”.
The build
- 🌀 Propeller Push Car: Push the car and the propellers on its back spin three times faster than the wheels! (level 1 of 5, about 12 minutes, 8 steps)