momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. See Newton's laws of motion.
2024年3月29日
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In Newtonian mechanics, momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction.
动量
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在经典力学里，动量被量化为物体的质量和速度的乘积。例如，一辆快速移动的重型卡车拥有很大的动量。若要使这重型卡车从零速度加速到移动速度，则需要使到很大的作用力；若要使重型卡车从移动速度减速到零，则也需要使到很大的作用力；若卡车轻一点或移动速度慢一点，则它的动量也会小一点。
动量在国际单位制中的单位为kg·m/s。 维基百科
6天前 · The meaning of MOMENTUM is a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product ...
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Momentum can be defined as "mass in motion." All objects have mass; so if an object is moving, then it has momentum - it has its mass in motion. The amount of ...
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