Question

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 bookshelf
(c) height of the book-shelf and time taken
(d) mass of the book, height of the book-shelf
and time taken

Answer 1

Answer:

correct option is b

Explanation:

B option is correct one.Since Workdone=Force× displacement

H is displacement

F is weight

WD doesn’t depend on time but power does.So no use for time.