本题目来源于试卷: gc physics textbook chapter 3 problems，类别为 IB物理学
[问答题]
Revisit Conceptual Example 3-7, and assume that the boy with t0 qazacxk2xom bzh; lcc 2j3;7v+; 0tehe slinbl vevx. e429zti1ur l7/5t nygshot 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 wron.579 elvi bynuxt 1r4ve/2lztg move by letting go at the moment the water balloon is shot.
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