【摘要】 将多片导电的强磁磁铁同极吸引在圆柱电池的正负极,构成一辆"磁力小车".将其放入裸铜弯制成的螺线管当中,可以看到电池与磁铁组成的小车会沿着螺线管运动起来,直到从螺线管另一端穿出.针对上述现象,从理论上进行了研究,建立数学模型并通过MATLAB数值仿真,结果表明,磁力小车做加速度减小的加速运动,直至匀速.其加速度、速度与磁场、工作电流、小车质量等因素有关.更多还原

【Abstract】 Magnetic train is such a device in which many pieces of magnet attract to the positive and negative electrode of a battery with the same poles. When the train is put in a bare copper solenoid, it will move along until come out from the other side. To the phenomenon, numerical simulation in MATLAB is chosen to be investigated in theory in this paper. The results show the motion law of the train: it will make an accelerated motion with deceleration until uniform motion. And the acceleration, velocity are related to many factors such as magnetic field, working current and the mass of the magnetic train.更多还原