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重点一探究杠杆平衡条件时应注意的问题1.调节杠杆水平平衡时,依照“哪边高向哪调”的方法,即杠杆右边高则螺母向右移,杠杆左边高则向左移,直至杠杆水平平衡。注意杠杆水平平衡一旦调好,不得随意再旋转平衡螺母,否则会影响实验结果。2.实验中,每次改变动力、阻力、动力臂、阻力臂后都要使杠杆保持水平平衡,这样动力臂和阻力臂都可以直接读出。动力臂和阻力臂的长度单位不一定要用米,只要两个力臂的长度单位统一就可以了。
Focus on a lever to explore the balance of conditions should pay attention to 1. Adjustment lever horizontal balance, in accordance with “Which side high to tune ” method, that is, the lever to the right of the high right to the nut, the left lever is high to the left Until the lever is level balanced. Note that once the level of the lever balance is adjusted, do not rotate the balance nut at random, otherwise it will affect the experimental results. 2 experiments, each change in power, resistance, power arm, resistance arm should make the lever to maintain horizontal balance, so that power arm and resistance arm can be read directly. Power arm and resistance arm length units do not have to use rice, as long as the two arm length unit unity on it.