Cycling to school

The video tutorial explains how bicycle gears work and how they help in cycling. It describes the function of gears in linking pedal movement to wheel movement. The tutorial covers the use of low gear for uphill cycling, which requires less effort but reduces speed. It also explains the use of mid level gear for balanced effort and speed on flat terrain. Finally, it discusses the use of high gear for faster cycling downhill, where one pedal turn results in two wheel turns, allowing for greater speed.

What is the relationship between the pedal turns and the bike wheel turns in different gear settings?

Explain why Robin switches to a high gear when cycling downhill.