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 x rkyh0-m w+9vbj(te 0a poinjf rf6, 0dnkdsx.o,kwe97r7at 30 m above the bottom of a dip with a speed of 25 m/s (See Fig. 6-2). Neglect frir6ek dnsrfk790w oxf ja.7d,, ction, what will be the speed of the roller coaster at the top of the next slope, which is 45 m above the bottom of 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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