gc textbook chapter 2 Kinematics in One Dimension (id: dbe1c25c8)

本题目来源于试卷: gc textbook chapter 2 Kinematics in One Dimension，类别为 IB物理学

[填空题]
An airplane travels 3100 km at a speed of 790 km2 l, p4rm8*mbot wuz0x/h , and then encounters a t4 rqz)v58zkj w,h)hssailwind that boosts its w4vjh)h5r)zskz 8 ,qs speed to 990 km/h for the next 2800 km.
What was the total time for the trip?    h
What was the average speed of the plane for this trip? [Hint: Think carefully before using Eq. 2–11d.]    km/h

参考答案:
空格1: 6.752±2%  空格2: 873.8±2% 


本题详细解析:

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