Mulailah

Tanpa permulaan, anda tidak akan sampai ke mana-mana.

Semangat

Semangat yang kuat mampu mengatasi apapun cobaan yang datang.

Konsisten

Lumbung emas dalam diri kamu adalah pikiran kamu. Kamu dapat menggalinya sedalam-dalamnya dan sepuas-puas yang kamu inginkan.

Pantang Menyerah

Gagal selepas usaha adalah hikmah, anda akan mendapat sesuatu yang lebih besar daripada apa yang anda sangkakan.

Be The One

Be the one is better than be the best.

Friday, March 2, 2012

WHAT IS ENERGY?

Matter is made up of invisibly small particles, occupies space, has mass, and exhibits gravitational
attraction. Energy, on the other hand, possesses none of these characteristics. Evidence of energy is
everywhere. All you need to do is look for motion, heat, and light.
The nature of energy is very complex, but it is best described by these characteristics:
  • energy is the ability to do work,
  • work is the application of a force through a distance (e.g., carrying yourself and a loaded back pack up a mountain trail),
  • force is that which can put matter into motion or stop it if it is already moving ( e.g. , you are stopped at a stop sign and the car behind you doesn't see you stop, and can't stop before colliding with your rear bumper, pushing you into the intersection), and
  • motion is a change in distance or direction with time (e.g., making a right hand turn).
Energy can be possessed by an object in two different ways, as kinetic energy and potential energy. If this energy is due to the fact that matter is moving or is in use, it is called kinetic energy. If it is due to the position, structure of matter, or composition, it is called potential energy. Potential energy is stored energy.
Table I. Potential and Kinetic Energies.