1. 拎起物件：物件增加了 gravitational potential energy，而这物件赚得的 energy 是从我们的手拎起它的力而来，所以 There is work done on the object by us. 2. 拎起物件后不动：虽然我们拎住件物件消耗了我们的能量，令我们觉得疲倦，但是物件并没有再赚得额外的 PE 或 KE，我们没有再传送...
betweengravitationalpotentialenergyandkineticenergy 1.7.6Recallanduse:P=workdone÷timetaken.P=Fvand Efciency= useulenergy(power)output energy(power)input W k Whenenergyistranserredromoneormtoanotheritmaybetranserredbydoingwork.For example,whenyoulitanobjectyoudoworkbytranserringchemicalenergytokineticenergy...
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...
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...
A low energy building in a life cycle-its embodied energy, energy need for operation and recycling potential 热度: 《大学物理》英文课件8 Potential Energy and Conservation of Energy 热度: Chapter6 Work,KineticEnergyandPotential Energy 6.1 TheImportantStuff ...
Work done is the difference between the potential and kinetic energy Work done is equal to the change in energy Work done is the decrease from potential to kinetic energy None are correct Next Worksheet Print Worksheet 1. Why is potential energy called stored energy? It has the pote...
The problem can be solved by using the conservation of energy equation, which states that the work done by non-conservative forces must equal the change in potential energy plus the change in kinetic energy. Feb 26, 2012 #1 EddyH 2 0 Homework Statement A train with a mass of 250 ...
Potential Energy b W F dr U(r ) U(r ) U b a a • The work done by a conservative force can be represented in terms of the change in potential energy. The potential energy U is the energy associated with the configuration of ...
theforcedoesanegativework.Forinstance:theshipgoesaheadovercomingtheresistanceofthewater,consumingtheenergy.personagainstwindconsumetheenergy.(2)Forceactsontheparticle,andtheparticlemovesafinitedistanceinthespace,theworkdonebytheforcewillbe dr A B dAFdr BAA F AABdA ...
4.The net work done on or by an object is equal to the change in the kinetic energy of the object5.Potential energy is energy associated with an object’s position. Two forms of potential energy discussed in this chapter are gravitational potential energy and elastic potential energy....