Newton’s law of motion (id: 55ac539c1)

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 rollercoaster cartrolls frictionlessly sg3 4ldl1ks+j/-qz pxalong the curved t*o eaj,ar9 cmakd.9p wse605orack from poi9.o peja6c wsm5kd9a 0*ore,ant A to point C under the influence of gravity. What would be the direction of the cart's acceleration at point

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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