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If you lift a book from the floor to the table. Compared to the weight of...

If you lift a book from the floor to the table. Compared to the weight of the book, how much force would be needed to start lifting it? Once it is in motion, how much force would be needed?

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Answer #1

Weight of the book = mg

Force needed must be greater than weight of the book

Once it is in motion, force needed to lift must be greater than the weight of the book otherwise book moves downward due to heavy weight or if weight of book will be greater than the force we apply.

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