CAJ | 학술논문

针对高中物理教科版教材中平抛运动的演示实验装置存在的不足，对平抛运动演示仪进行了改进。该演示仪在水平方向上，利用电磁铁控制2个小球开始运动时间，当小球通过弯度相同的2个玻璃管后，一个做平抛运动，一个做匀速直线运动，最后会相碰，由此说明平抛运动的在水平方向上是匀速直线运动。在竖直方向上，利用单片机自制了延时电路，当做平抛运动的小球和做自由落体运动的小球落地时，发光二极管会分别发出红光和绿光，通过2个二极管的发光情况可以判断出两小球同时落地，即可以判断出平抛运动的竖直方向上是自由落体运动。
침대고중물리교과판교재중평포운동적연시실험장치존재적불족，대평포운동연시의진행료개진。해연시의재수평방향상，이용전자철공제2개소구개시운동시간，당소구통과만도상동적2개파리관후，일개주평포운동，일개주균속직선운동，최후회상팽，유차설명평포운동적재수평방향상시균속직선운동。재수직방향상，이용단편궤자제료연시전로，당주평포운동적소구화주자유락체운동적소구락지시，발광이겁관회분별발출홍광화록광，통과2개이겁관적발광정황가이판단출량소구동시락지，즉가이판단출평포운동적수직방향상시자유락체운동。
Some improvements were introduced to overcome the shortages of the experiment de‐vice of demonstrating horizontal projectile motion in teaching materials .In horizontal direction ,an e‐lectromagnet was used to make two balls move at the same time .After passing through glass tubes with same bending ,one ball was horizontally projected ,the other was in uniform motion .Finally , two balls would collide with each other .This showed that horizontal projection of horizontal projectile motion is uniform motion .In vertical direction ,a time‐delay circuit was designed using single chip mi‐croprocessor .When the horizontally projected ball and the free‐falling ball landed ,LEDs would emit red light and green light ,respectively ,enabled one to judge if the two balls fell to the ground simulta‐neously ,namely one could judge if a horizontally projected object moves like a free‐falling body in the vertical direction .