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

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 from rest at a point 45 m abovk5dwk p wnn47o5l/c 8he /f jyg93) :(mn) tzety6oq vgfthe bottom of a dip (See Fig. 6-2). Neglect friction, what will be the speed of the ro(3fy:egz)yj /96otn)f t vm gqller 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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