If you swing a bucket of water fast enough in a vertical circle, at the highest point the water does
not spill out. This happens because an outward force balances the pull of gravity on the water.

Question

Quizplus · Accepted Answer

At the highest point, the water does not spill out due to the centripetal force acting towards the center of the circle, which is provided by the tension in the bucket handle and the gravitational force acting on the water, not an outward force.

If You Swing a Bucket of Water Fast Enough in a Vertical