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天平——这—精密灵敏的等臂杠杆,本是测质量的仪器,但它也可用来测力,尤其是显示和测量微小力及力的微小变化。调节天平平衡后,将一待测力沿铅垂方向加在天平一端,即使该力极其微小,天平平衡也将破坏,此时在天平另一端加砝码,使天平重新平衡(注意按天平操作规则使用天平),则所加砝码重力即为该力大小(在力较小时,
Balance - This - precision and sensitive arm lever, this is the instrument to measure the mass, but it can also be used to measure force, especially the display and measurement of small forces and small changes in force. After adjusting the balance of the balance, add a force to be measured along the vertical direction to one end of the balance. Even if the force is extremely small, balance balance will be destroyed. At this time, add a weight at the other end of the balance to rebalance the balance (note that the operation is performed by the balance. If the balance is used in the rule, the weight of the added weight is the magnitude of the force (if the force is small,