JEE Main Physics question
You lift a heavy book from the floor of the room and keep it in the book-shelf having a height of 2 m. In this process you take 5 seconds. The work done by you will depend upon [MP PET 1993]
Answer: (B)
Solution
Work done against gravity = weight × height raised = mgh; it does not depend on the time taken (that determines power, not work).