Physics Unit6: Work and Energy (id: 83eaf4dc5)

本题目来源于试卷: Physics Unit6: Work and Energy，类别为 通用国际物理

[单选题]
A roller coaster starts froy-x54(+ wilaw1te ly nm ka z0v vz75h 7/gx,go6myxf5brest at a point 45 m above the bottom of a dip (See Fig. 6-2). Neglect fro,m/xv7z fzb05khva 7g6gy x 5iction, what will be the speed of the roller coaster at the top of the next slope, which is 30 m above the bottom of the dip?

A. 14 m/s
B. 17 m/s
C. 24 m/s
D. 30 m/s


参考答案:  B


本题详细解析: 暂无

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