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精简版指南针
逐光而航
8 Views • Apr 20, 2025
Description
一个带孔的圆柱形磁铁吸上一个重量合适的球，就会形成杠杆，使得几乎只有支点与地面接触，减小摩擦力。原理类似司南，若用两个球在同一侧则可以更精确地调整力臂。#生活记录 #DIY #手工 #磁铁 #指南针 #记录 #分享 #杠杆 #物理
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