(3)物体以v=4m/s,半径1的圆周运动 2HN-Mg-MU N- M(G+ 5019.8+4 =836N 24 2×0.4 结束目录 v l 2 2mN Mg = M (g+ ) N = M v l 2 2m 50 = 9.8 2 0.4 4 4 × ( + ) 2 =836N (3)物体以v =4m/s，半径 l 的圆周运动 结束 目录