单词	Newton's laws of motion
释义	Newton's laws of motion /ˈnjuːt(ə)nz / plural noun Physics Three fundamental laws of classical physics. The first states that a body continues in a state of rest or uniform motion in a straight line unless it is acted on by an external force. The second states that the rate of change of momentum of a moving body is proportional to the force acting to produce the change. The third states that if one body exerts a force on another, there is an equal and opposite force (or reaction) exerted by the second body on the first.The stunt draws upon a variety of physics theories including the conservation of angular momentum and Newton's laws of motion.... Therefore, when an atom emits or absorbs a photon, its momentum changes in accordance with Newton's laws of motion. For example, Isaac Newton's laws of motion state that a body moving through empty space with no forces acting on it will go on moving in the same way.
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