# Work Energy and Power

## Transfer of energy from one kind to another

Transfer of energy from one kind to another The law of conservation of energy which was mentioned earlier states that energy is never destroyed but is only transferred from one form to another. As an example we shall now discuss the way in which the law applies to a grandfather clock. The energy we spend in winding up …

## Internal energy

Internal energy We remarked on the obvious nature of the two kinds of energy possessed by a falling stone. What is not quite so obvious is the internal energy of the molecules inside the stone. The molecules of a substance are in continual motion. According to the state of the substance, they possess kinetic energy of motion or …

## Interchange of energy between potential energy and kinetic energy

Interchange of energy between potential energy and kinetic energy A swinging pendulum bob is an example of a body whose energy can be either  kinetic or potential or a mixture of both. It is all potential at the extreme end of the swing and all kinetic when passing through the rest position. At intermediate points it is …

## Mechanical energy

Mechanical energy In mechanics, energy is divided into two kinds called potential and kinetic energy (abbreviated p.e. and k.e. respectively). I’iGnetic energy is the energy which a body has by reason of its motion. Potential energy ~s the energy something has by reason of its position in a field of force or by its staW Obvious examples of kinetic …

## Energy

Energy Anything which is able to do work, as defined above, is said to possess energy, and therefore I nergy is the capacity to perform work. Work and energy are, of course, both measured in the same units, namely, joules. The world we live in provides energy in many different forms, of which the most important has been chemical energy. …

## Work Energy and Power

Work Energy and Power Work In ordinary conversation the word “work” refers·to almost any kind of physical or mental activity, but in science and mathematics it has .one meaning only. Work is done when a force produces motion. A locomotive pulling a train does work; so does a crane when it raises a load against the pull of …