The mass of a bucket full of water is 15 Kg. It is being pulled up from a 15m deep well. Due to a hole in bucket 6 Kg of water flows out. Find the work done in pulling it out of the well.,

Solution:

workdone = change in potential energy

W = Force times distance

= (m - dm) g • (x)

= mgx - (dm (gx))

= (15 * 10 * 15) - (6/15 gx. dx)

=2250 - (6/15 x10x 225/2)

=2250 - (3 x 15x 10)

= 2250 - 450

= 1800 Joule

The answer is 1800 Joules.