You drop a 1.30 kg book to a friend who stands on the ground at distance D-12.0 m below. If your friend's outstretched h

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You Drop A 1 30 Kg Book To A Friend Who Stands On The Ground At Distance D 12 0 M Below If Your Friend S Outstretched H 1 (64.55 KiB) Viewed 47 times

You drop a 1.30 kg book to a friend who stands on the ground at distance D-12.0 m below. If your friend's outstretched hands are at distance d - 1.30 m above the ground (see the figure). (a) how much work Wą does the gravitational force do on the book as it drops to her hands? (b) What is the change AU in the gravitational potential energy of the book-Earth system during the drop? If the gravitational potential energy U of that system is taken to be zero at ground level, what is U (c) when the book is released and (d) when it reaches her hands? Now take U to be 100 J at ground level and again find (e) W, (f) AU. (g) U at the release point, and (h) U at her hands. (a) Number (b) Number (c) Number (d) Number (e) Number Number i 1 EFFE Units ME SEFED Units Units Units Units Units