gc physics textbook chapter 3 problems (id: d27d13116)

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

[填空题]
A rescue plane wants to drop supplies to isolated mountain climbers on a i:lg5dsp8hl o8 8,hvb793b.zhvr jcduddxx/ -y 6ck3rocky ridge 235 m below. If ycdc xrz- 3.3dkh7dub6xjv/9 the plane is traveling horizontally with a speed of 250 $\mathrm{~km} / \mathrm{h}(69.4 \mathrm{~m} / \mathrm{s})$

(a) how far in advance of the recipients (horizontal distance) must the goods be dropped (Fig. a)?    m
(b) Suppose, instead, that the plane releases the supplies a horizontal distance of 425 m in advance of the mountain climbers. What vertical velocity (up or down)  ----待选择----updown  should the supplies be given so that they arrive precisely at the climbers' position (Fig. b)?    m/s (fill in magnitude here)
(c) With what speed do the supplies land in the latter case?    m/s

参考答案:
空格1: 481±2%  空格2: down  空格3: 8.37±2%  空格4: 97.4±2% 


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