Every object in the universe has kinetic energy to move from one place to another. The energy possessed by a body by virtue of its motion called the kinetic energy. A rocket travelling to the Moon has kinetic energy as does a snail crawling along a wall. It is the kinetic energy of objects that makes them difficult to stop and the kinetic energy of the air in a hurricane that causes severe damage to the countryside.

- Mass of the object(m)
- Speed or velocity (v)

In general the work done on an object is equal to the change in the kinetic energy of the object. If the final speed v is greater than the initial speed u then W is the work done in accelerating the object over a distance s. If the final speed v is less than the initial speed u then W is the work done in slowing the object down over a distance .