中国大学MOOC: 如图所示，一半径为R的木桶绕轴线以角速度ω匀速转动，有一小球紧贴在木桶壁上，要使小球不掉下来，球与桶壁间的静摩擦系数至少应为http://edu-image.nosdn.127.net/7E6F2C67852B53135885E437590D08DA.bmp?imageView&type=jpeg&thumbnail=890x0&quality=100
举一反三
- 如图所示，一半径为R的木桶绕轴线以角速度ω匀速转动，有一小球...il=890x0&quality=100
- 中国大学MOOC: 如图所示，网孔I的网孔电流法方程应为（ ）http://edu-image.nosdn.127.net/38E38CF64EC070E95E47B1FB7F977634.bmp?imageView&type=jpeg&thumbnail=890x0&quality=100http://edu-image.nosdn.127.net/43A73C3A226230A96E5C62EDD9D4EBE8.bmp?imageView&type=jpeg&thumbnail=890x0&quality=100
- 如图，半径为http://edu-image.nosdn.127.net/_PhotoUploadUtils_7ed03c93-61b2-4a6d-9e9f-9a887ce3de43.png 的圆筒，绕竖直中心轴转动，一物块靠在圆筒的内壁上，它与圆筒的摩擦系数为μ。现要使物块不下落，则圆筒转动的角速度ω至少为：（ ）http://edu-image.nosdn.127.net/8381EDD978A09B048CCFB43297EA61A8.png?imageView&thumbnail=890x0&quality=100
- [img src="http://edu-image.nosdn.127.net/C8EC0B0C890042F81AB9CF0941243122.bmp?imageView&type=jpeg&thumbnail=890x0&quality=100"] 未知类型：{'options': ['2', '0', '1', '[img src="http://edu-image.nosdn.127.net/EAB437E744FF87F763873F106CCCE3E9.bmp?imageView&type=jpeg&thumbnail=890x0&quality=100"]'], 'type': 102}
- [img src="http://edu-image.nosdn.127.net/E9ECD91FC8FB3437CBAE9E731E05C1F9.bmp?imageView&type=jpeg&thumbnail=890x0&quality=100"] 未知类型：{'options': ['[img src="http://edu-image.nosdn.127.net/844D4F13280FCB22936CC001C2655964.bmp?imageView&type=jpeg&thumbnail=890x0&quality=100"]', '0', '1', '[img src="http://edu-image.nosdn.127.net/39355C3F2BE9AE15346505596CAABAF4.bmp?imageView&type=jpeg&thumbnail=890x0&quality=100"]'], 'type': 102}