This law was put forward by isaac newton in his book Mathematical Principles of Natural Philosophy 1687. Newton's second law of motion, the first and third laws together constitute Newton's law of motion, and the basic law of motion in classical mechanics is expounded.
Under the condition of constant acceleration and mass, the acceleration of an object is directly proportional to the acting force, inversely proportional to the mass of the object, and directly proportional to the reciprocal of the mass of the object. The direction of acceleration is the same as that of acting force. Newton's second law of motion can be expressed in proportion.
Extended data:
Characteristics of Newton's second law;
Instantaneity: Newton's second law of motion is the instantaneous effect of force. Acceleration and force produce, change and disappear at the same time.
Vector: F=ma is a vector expression, and the direction of acceleration and resultant force is always the same.
Independence: an object is subjected to several external forces, and the acceleration generated by one external force is only related to this external force and has nothing to do with other forces. The vector sum of acceleration produced by each force is equal to the acceleration produced by the resultant force, and the resultant force acceleration is related to the resultant force.
Causality: Force is the cause of acceleration, and acceleration is the function of force. Therefore, force is the reason to change the motion state of an object.
Baidu Encyclopedia-Newton's Second Law