Physics Unit6: Work and Energy (id: 92a6a32f9)

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 at a point 30 m above the bottom of a dip with a .oz* ti +u wbad7/.qusknw62y yq)/vqr o 2ce r3xqxivlsd5s6b /5+hy2 8m zl*speed of 25 m/s (See Fig. 6-2). Neglect friction, what will be the speed of the roller coaster at the top of the next slope, which is 45 m above the bottom ocvq/lzbeq q )lsx35rxyymvh*5 +so2ir/628d f the dip?

A. 14 m/s
B. 16 m/s
C. 18 m/s
D. 20 m/s


参考答案:  C


本题详细解析: 暂无

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