本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
99.22: A child whirls a ball at the end of a rope, in fu 9d22q;;:mj mrswwf a 8v8eebz(ba a n2f,: l5f9 iq*wgv 6kcauniform circular motion. Wkf 5f( 6,zeive8c:aaba qv2b*9gwn l8hich of the following statements is NOT true?
A. The speed of the ball is constant
B. The velocity is of the ball is constant
C. The radius is constant
D. The magnitude of the ball's acceleration is constant
E. The acceleration of the ball is directed radially inwards towards the center
参考答案: B
本题详细解析:
暂无
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