You drop a 2.60 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 = 1.50 m above the ground (see the figure), (a) how much work Wg 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) Wg, (f) AU, (g) U at the release point, and (h) U at her hands.

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(c) We are asked to isolate t [work shown below]. Vors Ve cos Q Voy- : V, sin e Ranger X= Vore t x Vz Cos E . € cos Afso AY= Voy't hes Va sin @it . he= Vz sin Ô .t-4,9€² 4.9¢² -Vz sin@etphz20 9.01 Then to plug it into y (1) = yo + Vo,yt +;a,t“. I am hoping for help on the second step.

Now imagine the same root as in Question attached being placed in a dry soil in which the little soil water present has a water potential of –1.0 MPa. Would water move from the soil into the root or would it move from the root into the soil?