Conservation Of Energy

Conservation of Energy

Transforming Electrical Energy Electric energy can be transformed into many other types of energy. Ex. Light bulb  What kinds of energy can result from a light bulb? Answers – Light Energy, Thermal Energy

Transforming Chemical Energy What kinds of Energy can be converted from Chemical Potential Energy? Ex. A Car Engine Answers – Thermal Energy (burning fuel), Kinetic Energy (Gases causing parts of engine to move).

Other types of energy transformations aren’t always visible or noticeable. Ex. Plants: Light energy  Chemical energy; Chemical energy  other energies in your body.

Conversions between Kinetic & Potential Energy Mechanical Energy = Potential Energy + Kinetic Energy. Mechanical Energy is due to the position and motion of an object.

Potential & Kinetic Energy

What happens to Potential Energy (PE) when an Apple falls from a tree? Answer PE is converted to Kinetic Energy (KE). **Energy is NEVER LOST; only CONVERTED.**

The Law of Conservation of Energy “Energy cannot be created nor destroyed.” Ex. Ball thrown in the air; KE converted to PE  mechanical energy stays constant.

Friction What would happen to Kinetic Energy if your bicycle rolled to a stop? Answer  Friction stopped the bicycle; converted KE to PE.  KE is also converted to Thermal Energy from Friction.

Converting Mass into Energy Nuclear Fusion and Nuclear Fission are examples of converting Mass into Energy. Nuclear Fusion – Atoms collide with each other so strongly that they fuse together; energy is released. – Nuclear Fusion occurs in the Sun.

Nuclear Fission – Opposite of Nuclear Fusion; atoms split apart and energy is released.