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在“人在起跳时是不是做功?”的疑惑中认知功的物理概念,2006年的一道选择题引发了对功这一概念的深度解析。功的概念,认知的关键是L物体受力作用点的位移。“人在起跳时弹力是不是做功?”答案是弹力不做功,分析原因及人动能的来源,例举类同问题并轻易解决。
The physical concept of cognitive work in the puzzled “” when people jump off? A multiple choice question in 2006 triggered an in-depth analysis of the concept of work. The concept of work, the key to cognition is the displacement of the point where L objects are stressed. "The answer is elasticity does not do work, analyze the causes and sources of human kinetic energy, cite similar problems and easily resolved.