描述
一个木制直角杠杆与支点在角度,水平臂为15厘米。竖臂为20厘米。,a spring balance with adjustable wing nut is attached to the shorter arm. The lever arm is with scale and grooved at every 5 cm. Complete with one sliding weight of 1 kg.
一个木制直角杠杆与支点在角度,水平臂为15厘米。竖臂为20厘米。,a spring balance with adjustable wing nut is attached to the shorter arm. The lever arm is with scale and grooved at every 5 cm. Complete with one sliding weight of 1 kg.
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