What is most of the work done transformed into ?

Work is defined in physics as being the result of a force times a distance. Work = force x distance. Work is done on an object, when a force works on it to either change its motion or its position. An object does work when it exerts a force to change the position or motion of another object. There are several different examples of work, the most prominent being work done against gravity. For example, lifting something up. Power is defined as the rate at which work is done, Power = Work / time.

Work is the change in energy. Work done on an object can give that object either potential energy or kinetic energy. There are several different forms of potential energy, the most common being gravitational potential energy, which is the energy due to an objects mass and position. Kinetic energy is the energy due to an objects velocity.

Whenever the amount of energy in one form (such as potential energy) diminishes, the amount in another form (such as kinetic) increases by the same amount. Energy is never created or destroyed. There is relationship between potential and kinetic energy, such that the total energy of an object at any given time equals its potential energy plus its kinetic energy.