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动能和势能的概念以及影响各自大小的因素是各类考试的必考点,多以填空、选择和实验探究题的方式出现.欲高效准确地解答此类问题,我们需从以下几个方面予以突破.理解什么是“能”能量简称能,是指物体做功的本领.一个物体能够做功,我们就说这个物体具有能量.物体具有能量并不等于它一定要做功,如山顶上静止的石头具有能量,但它并没有做功.而物体在做功时总是伴随着物体能量的变化,物体做的功越多,物体消耗的能量也越多.能量的单位和功的单位相同,都是焦耳.例1理解“能”的概念,是我们学习动能和势能的前提和基础.下列有关“能”的说法中,你认为正确的是().A.一个物体能够做功越多,这个物体具有的能量越多B.用线悬挂着的静止的小球没有做功,所以小
The concept of kinetic energy and potential energy as well as the factors influencing their respective sizes are the necessary test points for all kinds of examinations, which are mostly filled in to fill in the gaps, selecting and experiential questions. To solve these problems efficiently and accurately, we need to make breakthroughs in the following aspects Understand what is “energy ” Energy abbreviation can, refers to the ability of an object to do work.An object can do work, we say that this object has energy.Energy does not mean that the object must do its work, such as the static stone on the top of the mountain Has energy, but it does not do work.And when the object is doing work always accompanied by changes in the energy of the object, the more work done by the object, the more the energy consumed by the object.Energy units and work units are the same, are Joule Example 1 The concept of “can ” is the prerequisite and basis for our study of kinetic energy and potential energy. The following statement about “energy ” is what you think is correct () .A. An object can do more work , The more energy the object has B. The still balls hanging from the wire do not work, so small