Tying rope with bucket handle
Now take a piece of rope no more than ½ inches in thickness and tie one end of the rope with the handle of the bucket. Hold the other end of the rope in your hand and give it a couple of wraps around your palm or wrist.
Spinning the Bucket
When you are able to feel some tension in the rope due to the weight of water pulling your hand, start spinning the bucket quite fast in a vertical circle as in case of a roller coaster.
Observe the water
When bucket starts moving in a circular path and establishes a uniform motion, it will be observed that the water inside the bucket does not fall over and remains in the bucket.
Repeat by replacing water
The same experiment can be tried by replacing water with any other object in the bucket.