Objectives: Students will become familiar with the concepts of work , conservative forces and potential energy . In addition, they will become acquainted with the principle of virtual work . After studying this chapter, students should be able to correctly apply this principle in order to determine...
Derive an expression for electric energy in terms of potential difference, current and the time for which current flows through a conductor. View Solution A dipole is placed parallel to the electric field. If W is the work done in rotating the dipole by 60° then work done in rotating it ...
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and I'm pretty sure potential energy is not neccissarly the same as work done. It's the negative of the change in PE that is the same as work done by a conservative force (like a spring, which is the case here) Also if the was the case wouldn't the spring constant reach it...
The potential energy change is equal to the mechanical work made against the plate weight, therefore the efficiency of the energy transformation is∵ 相关知识点: 试题来源: 解析 0.6 Computation of the change in potential energy0.2+0.2 Correct results for efficiency ...
Tags Energy Kinetic Kinetic energy Potential Potential energy Work Jul 14, 2012 #1 Bengo 46 0 Can anyone help me understand this equation: Work = ΔK + ΔU + ΔE (no heat). Where K is kinetic energy, U is potential energy, and E is internal energy. This is for nonconservative ...
Explain the concept of electric potential difference in terms of work done in transferring the charge. Electric Potential Energy: The electric potential energy is the potential energy associated with the electric field. At any point, the electric potential energy is...
True or False?Work-Energy Principle:When work is done by many forces acting on a body, the kinetic energy of the object changes. The total work done by all the forces appears as change in kinetic energy of the object, which is the statement o...
Useful work does include that done in climbing stairs or accelerating to a full run, because these are accomplished by exerting forces on the outside world. Forces exerted by the body are nonconservative, so that they can change the mechanical energy (KE + PE) of the system worked upon, ...
后面我们会看到,电场力实际上是一种保守力(conservative),也就是能量变化或做功的多少并不和受力物体的实际运动轨迹有关,只和起始位置和终点位置有关,因此我们就可以引入一个势的概念(Potential)。 功 ok, 我们先来回顾一下中学阶段对于功的定义。一个物体受到一个恒定力F的作用,以任意方向移动了长度L,那么我们...