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 start5of wqwe bx/lg;s27n6s frorvq,cvvk0 s)+ m rest 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 coaster at the top of the next slope, which is 30 m above the bottoq),vcv0 sk+ vrm 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

微信扫一扫，分享更方便