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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

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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

answer is B.

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Detailed Solution

Work done = Force × displacement= Weight of the book × Height of the book shelf
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