2023年普通高等学校招生全国统一考试·冲刺押题卷(五)5化学试卷 答案(更新中)

2023年普通高等学校招生全国统一考试·冲刺押题卷(五)5化学试卷 答案(更新中)，目前全国100所名校答案网已经汇总了2023年普通高等学校招生全国统一考试·冲刺押题卷(五)5化学试卷 答案(更新中)的各科答案和试卷，更多全国100所名校答案请关注本网站。

16.C【考查点】本题考查竖直平面内的圆周运动和动能定理。【解析】如图所示某时刻小环滑到Q点位置，设圆环的半径为R,小环下滑的高度为，小环到顶端P点的距离为d,在小环由P点下滑至Q点的过程中由动能定理有mgh=了m2,则由几何关系可得R-(R-h)?=心-h,R-/联立解得=√R·d,故小环的速率v正比于它到P点的距离d,C正确。

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