2. Law of acceleration: The acceleration of an object is directly proportional to the resultant force of all external forces acting on the object and inversely proportional to the mass of the object.
3. Law of Action and Reaction: The action and reaction between two objects always act on a straight line, with equal magnitude and opposite directions.
Extended data
The establishment of Newton's first law (law of inertia) has profound philosophical significance. It tells people that inertia is the nature of all objects, breaks the artificial boundary between ground motion and space motion, unifies macro and micro motion, and puts forward a single mode to deal with any motion. From this, we can successfully study the reasons for the change of the motion state of objects, which is the basis of the second and third laws.
Newton's laws about mechanics have three laws, which are called Newton's three laws, namely Newton's first law, Newton's second law and Newton's third law. The three laws explain the contents of mechanics, which are about people learning the basic laws of mechanics. They were put forward by the famous physicist isaac newton.
1687 expounds the basic contents of these three laws in Mathematical Principles of Natural Philosophy. After Newton's three laws were put forward, their applications in various fields were gradually recognized. These three laws explain the basic contents of mechanics.
Newton's first law does not apply to all reference frames. In fact, it only applies to inertial reference frames. Therefore, Newton's first law is often regarded as a criterion whether a reference system is an inertial reference system.
Sir isaac newton, a member of the Royal Society, is an English physicist, mathematician, astronomer, natural philosopher and alchemist. In the paper Mathematical Principles of Natural Philosophy published in 1687, he described gravity and three laws of motion.
These descriptions laid the scientific view of the physical world in the next three centuries and became the basis of modern engineering. By demonstrating the consistency between Kepler's law of planetary motion and his theory of gravity, he showed that the movements of ground objects and celestial bodies all follow the same natural law; Thus, the last doubt about the sun center was eliminated and the scientific revolution was promoted.
References:
Baidu encyclopedia-Newton's law