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 thec24ictoc xo7 ;zkbmz.:9ylh3 1m by5k boy with the slingshot is z4vi dtq+m.:f 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 treeq4mz ifdt:v.+ makes the wrong move by letting go at the moment the water balloon is shot.
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