通过受力分析,轻绳模型在匀强电场要受恒定的电场力,电场力可以与重力同向、反向,或与重力方向垂直,因此小球的运动与只在重力场当中的不完全一样。在匀强电场中,小球可做非匀速圆周运动或匀速圆周运动,做圆周运动的临界速度可在最高点、最低点或其他位置。 Through the analysis of the force, the model of the light rope is subjected to a constant electric field force at a uniform electric field. The electric field force can be in the same direction with the gravity, in the opposite direction, or perpendicular to the direction of gravity. Therefore, the motion of the ball is not proportional to the gravity field same. In a uniform electric field, the ball can do non-uniform circular motion or uniform circular motion, the circular motion of the critical speed at the highest point, the lowest point or other location.