Hill-climb gear test
Engineers (Advanced), mission M3 Gearboxes: How Cars Go, lesson 3 of 6.
Hook
Which gear climbs best? Which is fastest? They are not the same answer!
Fair test
Ramps at 10°, 15°, 20°. For each gear record: climbs? time? Make a gear-choice chart.
Bonus challenge
Write a “driver’s manual”: which gear to use when.
The build
🕹️ Sliding-Gear 2-Speed Cart: Your first real gearbox: slide the crank axle to switch between strong gear and fast gear! (level 2 of 5, about 22 minutes, 8 steps)