物体的加速度与所受的合外力成正比,与物体的质量成反比。加速度的方向与合力的方向相同。
The alternation of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.
"To give is to receive, to love is to be loved, and to live is to let live."