多功能惯性定律演示仪

Demonstrating the law of inertia using self-made instrument

针对教材中惯性定律演示存在的不足,制作了多功能惯性定律演示仪.通过直流电机的正反转带动牵引绳,拖动弹射小车往复直线运动,通过调速电位器可控制小车做匀速运动、加速运动或者减速运动.该演示仪不仅可以演示运动及静止的物体具有惯性,还可以演示液体也具有惯性.

Aiming at the deficiencies in demonstrating the law of inertia in the textbook,a multifunctional demonstrator was designed.The catapult car reciprocated linearly when the pulling rope was driven by DC motor,the moving speed was controlled by the speed regulating potentiometer,which could control catapult car to do uniform motion,accelerated motion or decelerated motion.The demonstrator could not only demonstrate the inertia of moving and stationary objects,but also demonstrate the inertia of liquid.