在气轨上做碰撞实验时,通常在滑块的一端弹簧上粘上适量的橡皮泥可以获得完全非弹性碰撞和弹性碰撞(如图中a),不加橡皮泥则可实现完全弹性碰撞。实际上,笔者在实验过程中发现图a所示的滑块在碰撞时不易互相粘连,尤其是在冬天,气温较低,再加上气轨上的冷风一吹, In the collision test on the air track, usually a proper amount of plasticine is stuck on the spring at one end of the slider to obtain a complete inelastic collision and an elastic collision (as shown in a), and a complete elastic collision can be achieved without the plasticine. In fact, the author found in the experiment shown in Figure a slider is not easy to stick to each other in the collision, especially in winter, the temperature is low, coupled with the cold air blowing on the track,