摘要:16.如图所示.光滑半圆轨道竖直放置.半径为R.一水平轨道与圆轨道相切.在水平光滑轨道上停着一个质量为M = 0.99kg的木块.一颗质量为m = 0.01kg的子弹.以vo = 400m/s的水平速度射入木块中.然后一起运动到轨道最高点水平抛出.当圆轨道半径R多大时.平抛的水平距离最大? 最大值是多少? (g取10m/s2)

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如图所示,AB为固定在竖直平面内的光滑圆弧轨道,轨道的B点与水平地面相切,其半径为R.质量为m的小球由A点静止释放,求:

⑴小球滑到最低点B时,小球速度v的大小

⑵小球刚到达最低点B时,轨道对小球支持力FN的大小

⑶小球通过光滑的水平面BC滑上固定曲面,恰达最高点D,D到地面的高度为h(已知h<R),则小球在曲面上克服摩擦力所做的功Wf

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