Newton's law of gravitation

例句：

1. 1. The law of gravity dictates that objects fall towards the center of the Earth.
   重力定律告诉我们物体会向地球的中心落去。
2. 2. The law of gravity is a fundamental principle in the study of motion and space-time.
   万有引力定律是研究运动和时空的基本原理。
3. 3. In the case of an object falling from a great height, the force of gravity can be calculatedusing the formula F = m * g, where F is the force, m is the mass of the object, and g is the acceleration due to gravity.
   当一个物体从很高的地方落下时，可以用公式F = m * g来计算它受到的重力，其中F是力，m是物体的质量，g是由于重力引起的加速度。