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现行高中物理上册第七章动量的变化一节,需要实验设备气垫导轨,如无这一设备,可用西安教学仪器厂生产的力学组合教具中的光滑金属导轨和以此配套的滑车代替。实验时,先用支架把两根导轨支起,固定住,再把两质量相同的滑车放在上面。滑车中部有一小孔,可将一截火柴棍之类的小棒插入,并把已用线绑紧的弹簧(必须比小
The current high school physics volume seventh chapter momentum changes section, the experimental equipment required air cushion guideway, without this equipment, available in Xi'an Teaching Instrument Factory production of mechanical combination aids in the smooth metal guide and the pulley instead. Experiment, the first bracket with two rails support, fixed live, and then the same quality two trolley on it. There is a small hole in the middle of the block, which inserts a small stick such as a matchstick and tightens the used wire (must be smaller than the smaller