Where you'll be next

For each leg, knowing how fast you're going, in what direction, and for how long, allows you to predict where you'll end up.

Keep feeding in the speed, direction and for how long, and you'll be able to make up maps of journeys in a new way.

Physicists make predictions like these to work out where the moon will be, the path water from a fountain will follow, and, yes, where bicycles will end up.