如图,光滑的绝缘竖直细杆与以正电荷Q为圆心的圆周交于B,C两点,设AB=BC=h,一质量为m,电荷量为-q的空心小球从杆上A点从精致开始下落,滑倒B点时的速度vB=根号下3gh,求:1.小球滑倒C点的速度vB2.A,
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![如图,光滑的绝缘竖直细杆与以正电荷Q为圆心的圆周交于B,C两点,设AB=BC=h,一质量为m,电荷量为-q的空心小球从杆上A点从精致开始下落,滑倒B点时的速度vB=根号下3gh,求:1.小球滑倒C点的速度vB2.A,](/uploads/image/z/13188535-7-5.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%85%89%E6%BB%91%E7%9A%84%E7%BB%9D%E7%BC%98%E7%AB%96%E7%9B%B4%E7%BB%86%E6%9D%86%E4%B8%8E%E4%BB%A5%E6%AD%A3%E7%94%B5%E8%8D%B7Q%E4%B8%BA%E5%9C%86%E5%BF%83%E7%9A%84%E5%9C%86%E5%91%A8%E4%BA%A4%E4%BA%8EB%2CC%E4%B8%A4%E7%82%B9%2C%E8%AE%BEAB%3DBC%3Dh%2C%E4%B8%80%E8%B4%A8%E9%87%8F%E4%B8%BAm%2C%E7%94%B5%E8%8D%B7%E9%87%8F%E4%B8%BA-q%E7%9A%84%E7%A9%BA%E5%BF%83%E5%B0%8F%E7%90%83%E4%BB%8E%E6%9D%86%E4%B8%8AA%E7%82%B9%E4%BB%8E%E7%B2%BE%E8%87%B4%E5%BC%80%E5%A7%8B%E4%B8%8B%E8%90%BD%2C%E6%BB%91%E5%80%92B%E7%82%B9%E6%97%B6%E7%9A%84%E9%80%9F%E5%BA%A6vB%3D%E6%A0%B9%E5%8F%B7%E4%B8%8B3gh%2C%E6%B1%82%EF%BC%9A1.%E5%B0%8F%E7%90%83%E6%BB%91%E5%80%92C%E7%82%B9%E7%9A%84%E9%80%9F%E5%BA%A6vB2.A%2C)
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