Q. You lift a heavy book from the floor of the room and keep it in the book–shelf having a height $2\ m$. In this process you take $5\ seconds$. The work done by you will depend upon
A) Mass of the book and time taken
B) Weight of the book and height of the book-shelf
C) Height of the book-shelf and time taken
D) Mass of the book, height of the book-shelf and time taken
Explanation
(b) Work done = Force $\times$ displacement
= Weight of the book $\times$ Height of the book shelf
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.