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 cartro+k*h5ntinr) wjwv 4+hlls frictihmvhg4o2+6 z.06dbli xxe 2 xv8bel 8konlessly along the curved track from pointz0.kvld+ mxh6g6 x 2l2b 48oixee vb8h 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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