本题目来源于试卷: Newton’s law of motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
02.27: The diagram belo gp.rq tq ied7z(jeb39 *wt9n9w shows three roll a vtqyhr3/9)fd c.m0zer coaster tracks of equal length. Assume that on all tracks the roller coaster carts start afq 9vd 3.zy c)h0mr/tfrom rest at the same elevation and moves frictionlessly over the tracks to the finish.
If all roller coaster carts start at the positions shown, on which track would the roller coaster cart be traveling the fastest at the finish? 
A. CartA
B. Cart B
C. Cart C
D. All would reach the finish at the sametime
参考答案: B
本题详细解析:
暂无
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