As long as the bucket is inside the water, its effective weight is less in accordance with Archimedes principle. When the bucket comes out of water, there is no upthrust due to water now. So the weight of bucket appears heavier.

As long as the bucket is inside the water, its effective weight is less in accordance with Archimedes principle. When the bucket comes out of water, there is no upthrust due to water now. So the weight of bucket appears heavier.