- Energy helps us do things. It gives us light. It warms our bodies and homes. It bakes cakes and keeps milk cold. It runs our TVs and our cars. It makes us grow and move and think.
- Energy is the power to change things. It is the ability to do work.
- Energy cannot be created or destroyed. It can ONLY be transformed.
Potential energy is energy stored in an object. This energy has the potential to do work. Gravity gives potential energy to an object. This potential energy is a result of gravity pulling downwards.
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.
As this boy pulls back the slingshot, the potential energy increases until he releases it.. then it becomes kinetic energy as the rock flies through the air. When the rock lands it once again has potential energy!!
Everything at REST has potential energy, and everything in MOTION has kinetic energy.
Look at this roller coaster.. can you label each position as potential or kinetic?
Practice building a roller coaster using these interactives!
Feel like singing? See what Mr. Edmonds has to say about Energy!