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数学

[填空题]
Romeo is chucking pebble hep q(mc;46z;l7tlu ss gently up to Juliet’s window, to lz 1hq2d/3la3t2j:(hg . (excvfhqand he wants 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 windo1qh q(3ja3lo2g 2fcd(x/h lttz .h :evw 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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