The resistance change of the motion of any object, the principle of inertia is one of the fundamental principle of classical physics. Which used to describe the motion of matter and the matter was from the source do. "Inertia from Latin means sluggish or lazy.Law of inertia may call another rules movement one of Newton rules as กล่าวระ lining. The object has no external action will be moving at a constant speed, that is, an object is moving at constant speed. (the same speed and direction as before). Until some strength to act on the object that caused the changes in speed and direction. This includes objects that did not move. (is there a speed equal to zero). It will be stopped until some strength to act on the object. For example, when there is a car still does not move. The inertia of the car is more than the force act of car to car moving. When the car is moving. Must increase the strength with more automobiles. To make the cars to move fast. And when to slow down the speed of the car. Braking force is greater than the inertia of the car.
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