Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Constant Acceleration Motion

匀加速运动

In the standard model of friction, the frictional resistance is given by the coefficient of friction times the normal force.


For this case the normal force is just the weight of the object.
在摩擦力模型中，摩擦阻力由摩擦系数乘以法向力给出。在这种情况下，法向力就是物体的重量。
 Application of Newton's second law to a single mass.
If an applied force F=N is opposed by friction with friction coefficient mu = acting on mass m=kg then the frictional resistance force is N and the net force is = N. Newton's second law becomes:

Net force = mass x acceleration

合外力等于质量乘以加速度
Net force = N = kg x m/s²

You may edit any of the data. When finished with data entry, click on the quantity you desire to calculate in the formula above. Quantities will not be forced to be consistent until you click on the desired quantity.


In U.S. common units this becomes:
Net force = lb = slug x ft/s²

In this system the weight on the earth's surface islbs.
将牛顿第二定律应用于单个质量。如果施加的力 F= N 与摩擦系数 mu = 的摩擦力作用于质量 m= kg 上，则摩擦力的阻力为 N，合力为 = N。牛顿第二定律变为：合力 = N = kg x m/s²。你可以编辑任何数据。在完成数据输入后，点击公式中你希望计算的量。在点击你希望计算的量之前，量不会被强制保持一致。在美式常用单位中，这变为：合力 = lb = slug x ft/s²。在这个系统中，地球表面的重量是 lbs。
中文译文中的待填/计算数值依次对应：1：fa 2：mu 3：mm1 4：mun 5：ff1 6：f1 7：m1 8：a1 9：f2 10：m2 11：a2 12：wc。实际数值以上方原输入框为准。

Remove friction

去除摩擦
 Index

Newton's laws

Standard mechanics problems
索引 牛顿运动定律 标准力学问题
 
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