Why does a cup full of liquid not spill if it hold it up high when a car goes over a speed bump, but spills if I don’t?

Question

If I know a bump is coming while I’m driving and I hold my cup up high it doesn’t spill. But if I leave it in the cup holder or even hold it around my stomach area, it will spill. I know it’s a physics thing but I never took physics. What causes this?

In: 2

Answer 1

These were all super helpful, thank you!