Question

A student lifts a heavy book from the floor of the room and put it in the book shelf having a height $2\text{m}$. He took $5\text{sec}$. The work done by the student will depend upon.

• A. Weight of the book and the height of the book shelf.
• B. Mass of the book, height of the book shelf and the time taken.
• C. Height of the book shelf and the time taken.
• D. Mass of the book and time taken.

Answer 1

The correct option is A Weight of the book and the height of the book shelf.

As we know that,
Work Done = Force $\times$ Displacement
It does not depends upon the amount of time taken to complete the work.