View Policies Current Attempt in Progress You drop a 240 kg book to a friend who stands on the ground at distance D-140

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View Policies Current Attempt In Progress You Drop A 240 Kg Book To A Friend Who Stands On The Ground At Distance D 140 1 (23.89 KiB) Viewed 26 times

View Policies Current Attempt in Progress You drop a 240 kg book to a friend who stands on the ground at distance D-140 m below. If your friend's outstretched hands are at distanced-1.60 m above the ground (see the figure). (a) how much work w 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 of that system is taken to be zero at ground level, what is (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, () Au. (g) U at the release point, and that her hands HID (a) Number Units