gc physics textbook chapter 3 problems (id: e614b6c39)

本题目来源于试卷: gc physics textbook chapter 3 problems，类别为 IB物理学

[填空题]
Romeo is chucking pebbles gently up to Juliet’s w*rltc 7w 1i3iyindow, and he xt/+j zeiwht* /)x3mrwants the pebbles to hit the window with only a horizontal component of velocity. He is standing at the edge of a rose garden 4.5 m below her wind3x )hij +w/z*/tmexrtow and 5.0 m from the base of the wall (Fig. below). How fast are the pebbles going when they hit her window?    m/s

参考答案: 5.2±2%


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