RRB Group D 17-Dec-2018 Shift 1 Soled Paper

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A student lifts a heavy book from the floor of a room to put it in the bookshelf at a height 2 m. For this process, the student takes 5s. The work done by the student will depend upon :

the height of the book shelf and the time taken
the weight of the book and the height of the bookshelf
the mass of the book and the time taken
the mass of the book, the height of the bookshelf and the time taken

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