gc physics textbook chapter 3 problems (id: d305006c2)

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

[填空题]
A passenger on a boat moving at 1l424muhs1abqxet2y(.r5 xli2ohpm/ 4 cspb 1.5glpt;+a :xz1, *u1xex88 khymqmn6su 0$ \mathrm{~m} / \mathrm{s}$ on a still lake walks up a flight of stairs at a speed of 0.50 $\mathrm{~m} / \mathrm{s}$ (Fig. below). The stairs are angled at $45^{\circ}$ pointing in the direction of motion as shown. What is the velocity of the passenger relative to the water?   

参考答案: 1.89±2%


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