F1 I.S.

All moving things have kinetic energy. It is energy possessed by an object due to its' motion or movement. These include very large things, like planets, and very small ones, like atoms. The heavier a thing is, and the faster it moves, the more kinetic energy it has.

energy is energy due to motion. The faster something is moving the more kinetic energy it has. Kinetic energy also increases as the mass of the moving object increases (assuming it is not a rest, in which case it has a kinetic energy of zero.)

kinetic energy can convert to heat and moreover potential energy
so when u learn in senior forms., then u will know more about them
the above 2 people have already given you some links to explore more into kinetic energy.
Good luck!

The kinetic energy of a moving object is equal to the work required to bring it from rest to that speed, or the work the object can do while being brought to rest: net force × displacement = kinetic energy, i.e.,

http://upload.wikimedia.org/math/6/d/c/6dc416a1828098f2f3079cd6731f9f9f.png