单选题:如图所示,MN为半径较大的光滑圆弧轨道的一部分,把小球A放在MN的圆心处,再把另一小球B放在MN上离最低点C很近的B处,

  • 题目分类:初中物理
  • 题目类型:单选题
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题目内容:
如图所示,MN为半径较大的光滑圆弧轨道的一部分,把小球A放在MN的圆心处,再把另一小球B放在MN上离最低点C很近的B处,今使两球同时自由释放,则在不计空气阻力时有(  )。 A.A球先到达C点
B.B球先到达C点
C.两球同时到达C点
D.无法确定哪一个球先到达C点


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