在连续几年的高三第一轮复习中,笔者从许多资料中都见过类似下面这道题的复习题.题目:半径为R的光滑半圆球固定在水平面上,如图1所示,顶部有一小物体A,今给它一个水平初速度v0=Rg～(1/2),则物体将(A)沿球面下滑至M图1点.(B)沿球面下滑至某一点N,便离开球面做斜下抛运动.(C)按半 In the first three years of high school review in consecutive years, the author has seen review questions similar to the following from many sources. Title: Smooth semicircular sphere with radius R is fixed on the horizontal plane, as shown in Figure 1. There is a small object A. Now give it a horizontal initial velocity v0 = Rg ~ (1/2), then the object will (A) slide down the sphere to M Figure 1 point. (B) slide down to a certain point N along the sphere and leave Spherical oblique oblique motion. (C) Press half