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 Examj3qffx * eh*bn8rw p 9(yaq/- j7w5zawple 3-7ay. 6;xipf:pzccx3pd 530w9 (n tcfw i, and assume that the boy with the 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 thdwp5f.a wp:ci0tnyz p fcx(;c x 963i3e moment the water balloon is shot.
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