energy, work done and power Flashcards
energy
capacity to do work
potential energy
stored energy in a system
elastic potential energy
energy stored in a body due to its elastic deformation
chemical potential energy
energy stored in a body due to the position of atoms or electrons in the body
gravitational potential energy
energy stored in a body due to its height above the ground, given by GPE=mgh
electrical energy
energy of an electric charge due to its motion and position
light
electromagnetic wave that is visible to the eye
thermal energy
energy stored in a body due to its temperature
nuclear energy
energy released during a nuclear explosion
kinetic energy
energy possessed by an object due to its motion, given by KE=1/2mv2
principle of conservation of energy
energy cannot be created nor destroyed, but can be converted from one form to another. The total energy in an isolated system is constant
work (done)
product of the force and the displacement moved by the object in the direction of the force
power
rate of work done or rate of energy conversion, given by P=W/t or P=E/t
