標題:
請用簡短的英文解釋Newton`s ? Law的內客
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發問:
請用簡短的英文解釋Newton' s Second Law和Newton' s Third Law的內容 簡短的英文:各70字以下 例子: Newton's First Law An object at rest tends(一直) to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless(除非) acted upon by an unbalanced force(不平衡力).
最佳解答:
Newton's first law Every object remains in a state of rest or uniform motion unless it is acted on by an unbalanced force Newton's second law The acceleration of an object is directly proportional to and in the same direction as the net force acting on it,and inversely proportional to the mass of the object Newton's third law For every action force,there must be an equal but opposite reaction force 中四程度ge...約到最簡就應該係咁喇,希望岩洗......= =
其他解答:
Newton's Laws of Motion describe only motion of a body as a whole and are valid only for motions relative to a reference frame. The following are brief modern formulations of Newton's three laws of motion: First Law A body at rest remains at rest, and a body in motion continues to move in a straight line with a constant speed unless and until an external unbalanced force acts upon it. Second Law The rate of change of momentum of a body is directly proportional to the impressed force and takes place in the direction in which the force acts. Third Law To every action (force applied) there is an equal and opposite reaction (equal force in the opposite direction). Another way of stating Newton's third law is that if object A exerts a force on object B, then object B exerts a force of the same magnitude on A, in the opposite direction. It is important to note that these three laws together with his law of gravitation provide a satisfactory basis for the explanation of motion of everyday macroscopic objects under everyday conditions. However, when applied to extremely high speeds or extremely small objects, Newton's laws break down; this was remedied by Albert Einstein's Special Theory of Relativity for high speeds and by quantum mechanics for small objects.
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