试题与答案

如图所示,小球用不可伸长的长度为L的轻绳悬于O点,小球在最低点至少需获得多大的速

题型:计算题

题目:

如图所示,小球用不可伸长的长度为L的轻绳悬于O点,小球在最低点至少需获得多大的速度才能在竖直平面内做完整的圆周运动?

答案:

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