本题目来源于试卷: gc physics textbook chapter 3 problems，类别为 IB数学
[问答题]
Revisit Conceptual Example 3-7, and assume that thvtstzr99 ,muc;q k ttec/;+n/ i*tc6fe boy with theock1mq5:w;.sg jwky : slingshot is below the boy in the tree (Fig. 3-36), and so aims upward, directly at the boy in the tree. Show that again the boy in the tree makes the wrong move by letting go at the mok.yqks;w1 g w5 oc::jmment the water balloon is shot.
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