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

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 with a speed of 5.0 m/s at a point 45 m a:/idn9q pv+ijc zb(( hbove the bottomvn qdb/jc pi:z+9 (h(in lr7,f w (xbek:ip*t1 of a dip (See Fig. 6-2). Neglect friction, what will be the s,b l1epf itk7x(rn*:wpeed 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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