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一、有力不一定做功。有力有距离,并且力距离要对应才做功1)有力无距离不做功。(S=0)2)冰柱在光滑的冰面上滑动,没有力对它做功。(F=0)3)力和物体运动方向垂直时力不做功.(S=0)结论:有力才有可能做功,但有力不一定做功,无力就谈不上做功力学中规定:1.功等于力和物体在力的方向上通过的距离的乘积。2.功的公式:功=力×距离W=F·S(注意S指F的方向上移动的距离)3.功的单位;焦耳(焦)1焦耳=1牛顿·米意义:1牛的力使物体在力的方向上,通过1米的距离时所做的功为1焦。
First, the strength does not necessarily work. There is a strong distance, and the distance between the force to do the work 1) no distance without power. (S = 0) 2) The icicle slides on a smooth ice surface and there is no force to work on it. (F = 0) 3) Force does not work when the force is perpendicular to the direction of motion of the object. (S = 0) Conclusion: There is a possibility that the force will work but the force does not necessarily work. Equal to the product of the force and the distance the object passes in the direction of the force. 2. The formula for work: work = force × distance W = F · S (note that S refers to the distance moved in the direction of F) 3. work unit; Joule (coke) 1 Joule = 1 Newton · m meaning: 1 cow Force makes the object in the direction of the force, through the distance of 1 meter when the work done is 1 coke.