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

Question

Quizplus · Accepted Answer

At the highest point in its path, the only force acting on the water is gravity pulling it down into the bucket, which provides the centripetal force needed for circular motion. There is no outward force acting on the water; the sensation of an outward force is a result of the water's inertia.

Uniform Circular Motion: If You Swing a Bucket of Water