The mass of a bucket containing water is 10 kg. What is the work done in pulling up the bucket from a well of depth 10 m if water is pouring out at a uniform rate from a hole in it and there is loss of 2kg of water from it while it reaches the top 
Text Solution
Verified by ExpertsThe correct answer is:
C
: Gravitational force on bucket at starting position
= mg = 10 × × 10 = 100 N
Gravitational force on bucket at final position
= 8 × × 10 = 80 N
So the average force through out the vertical motion
∴ ∴ Work done = Force × × displacement = 90 × × 10 = 900 J.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
If the unit of force and length each be increased by four times, then the unit of energy is increas…
A man pushes a wall and fails to displace it. He does
The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is do…
You lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2 m.…
A body of mass m kg is lifted by a man to a height of one meter in 30 sec. Another man lifts the sa…
A force newton is applied over a particle which displaces it from its origin to the point metres.…