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 s eoz;2sxqh;v1j 7 7 utupee z0n3pfzh ke() d of 5.0 m/s at a point 45 m above the bottom of a dip (See Fig. 6-2). Neglect friction, what will be the speed of the roller c fn30 h)pkze (zoaster at the top of the next slope, which is 30 m above the bottom of the dip? ![](data/attachment/exam/tbank/physics/1/6-2.jpg)
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
|