Why is it easier to balance on a plane than a bus, even though it is going at a faster speed?

Question

This probably sounds stupid, but why is it easy to get up in a plane, and walk around as if you were on the ground. Then on a bus it’s harder even though the speed of the vehicle, is slower?

In: Physics

Answer 1

Basically, you don’t feel constant velocity, you feel change in velocity (acceleration). The Earth is rotating at 1000mph at the equator and 67000mph around the sun, but you don’t feel it because the velocity doesn’t change. The bus is bouncing around everywhere, stopping/starting, etc.