牛顿定律 / Newton's Laws

第一定律 (First Law)

一切物体在没有受到力的作用时，总保持静止状态或匀速直线运动状态。

An object remain at rest or uniform motion unless acted by a resultant force

无摩擦时倾角越小，物体滑的越远；如果倾角为0度时会怎么样呢？
Without friction, the smaller the angle, the farther the object slides. What if the angle is 0°?

右斜面角度 (Right Ramp Angle): 30°

右斜面摩擦力 (Friction on Right Ramp)

物体的加速度与所受合外力成正比，与物体的质量成反比。

The acceleration of an object is proportional to the resultant force and inversely proportional to its mass.

F

=

m

×

a

加速度 (Acceleration)

0

速度 (Velocity)

0

m

力 (Force) F: 10 N

质量 (Mass) m: 10 kg

摩擦力 10N (Friction 10N)

Resultant force = 10 N | 加速度 (a) = 1.00 m/s²

作用力与反作用力大小相等，方向相反。

A

B

F_AB

F_BA

作用力：A 推 B (Action: A pushes B)

反作用力：B 推 A (Reaction: B pushes A)

D

C

F_CD

F_DC

作用力：C 压 D (Action: C presses D)

反作用力：D 顶 C (Reaction: D supports C)