gc physics textbook chapter 3 problems (id: 9fcecd4dd)

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

[填空题]
A ball is thrown horizontally from the(0w1z+/- mfsjb jf;qpkvqk .j roof c , t4a:wp1qaje -zg0vvv7et3 li9 +plof a building 45.0 m tall and lands 24.0 m from the :ve73 -j awe4lpaq+vcitzl ,v1t0pg 9base. What was the ball’s initial speed?   

参考答案: 7.92±2%


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