Physics Unit6: Work and Energy (id: 5f128c838)

本题目来源于试卷: Physics Unit6: Work and Energy，类别为 国际高中通用物理

[单选题]
A roller coaster starts with a speed on5ns7mt j)l lr6s9ju4f 5.0 m/s at a point 45 m above thewa i6r,ykc2 m0 bottom of a dip (See Fig. 6-2)2ky i,crw6m0a. Neglect friction, 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. 12 m/s
B. 14 m/s
C. 16 m/s
D. 18 m/s


参考答案:  D


本题详细解析: 暂无

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