球在水平旋转圆盘上的运动分析

Analyzing the movement of a ball on a horizontal rotating plate

研究了轻质球在水平旋转的圆盘上做无滑滚动时的运动情况,探究了圆盘转速、轻质球初始位置和速度等条件的影响.实验结果表明:小球在圆盘上做圆周运动,其运动周期是圆盘运动周期的7/2倍(实心球)或5/2倍(空心球),运动轨迹与初始时刻小球释放的位置、速度和圆盘的角速度有关.

The movement of a light ball rolled without sliding on a horizontal rotating plate was studied experimentally. The influences of the rotating speed of the plate and the initial position and velocity of the ball were explored. The experimental results showed that the ball on the plate did a circular motion. The period was 7/2 （solid ball） or 5/2 times （hollow ball） that of the plate, and the trajectory was affected by the rotating speed of the plate and the initial position and velocity of the ball.