Physics Unit6: Work and Energy (id: 83eaf4dc5)

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 from rest at a point 4mey;j: ju7usbc k 41q2cv4 b7a5 m above the botto( tbw3y. lf fpw2,m ;vn82uvcmm 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 bottom of the dm;vv b28 fmy2(ft3ww nl,pcu.ip?

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