Question

While drawing water from a well with a bucket the bucket of water appears to be lighter when it's under water is than when it's out of it . Give reason

Answer 1

When the bucket is under water, a buoyant force (which is equal to the weight of water displaced by the bucket) is created and acts upward on the bucket and makes the apparent weight of bucket lighter than its real weight. But when bucket comes out of water, this upthrust force vanishes and bucket appears heavier.
So, while drawing water from a well, the bucket of water appears to be lighter when it is under water than w than when it's out of it