本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
97.13: A small sphere is moving in a vertical oy7( hqzekmwn7+h1j)hw:h 7f circle at constant sov;j w en:m74xpeed. The magnitude of the net force on the sphereev ; 7mxwj:o4n
A. at the bottom of the loop is greater than the net force at the top.
B. at the top of the loop is greater than the net force at the bottom.
C. increases as the sphere moves from the bottom to the top.
D. decreases as the sphere moves from the bottom to the top.
E. is the same at the top of the loop as it is at the bottom of the loop.
参考答案: E
本题详细解析:
暂无
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