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]
02.29: Assume the rollerc 8bafff8:vqlj jhl 2o: jp 8+h3 n5a+sdoaster cartrolls frictionlessly along the curved t 3rz2o-gmcyo/q/zt z (rack from point A to point C under the influence of gravity. What would be the direction of the cart's acceleration at point q c//gy(z3t rm2z-zoo
A. upward
B. downward
C. forward
D. backward
E. no acceleration
参考答案: A
本题详细解析:
暂无
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