Index

Twice the Speed, Four Times the Stop

Lab The stopping distance

Included with a plan

This board is included with a plan. The first three lessons of every track are free, with their boards and videos. A plan unlocks every lesson, board, video, lab and paper for one price.

View plans →Already a member? Sign in

Lessons that use this board

Twice the Speed, Four Times the Stop. TWICE THE SPEED, FOUR TIMES THE STOP a stop is two distances: the road you cover while you THINK grows with speed, the road you cover while the brakes BITE grows with speed squared

Saved in this browser only.

← Why a Fuse Is a Weak Link on Purpose