Energy Transformationwhen energy is changed from one form

Energy Transformation-when energy is changed from one form to another S An object’s energy can be: 1. All Kinetic Energy 2. All Potential Energy 3. A combination of both S As velocity increaseskinetic energy increases and potential energy decreases S As velocity decreases kinetic energy decreases and potential energyincreases WHAT IS THE TYPE OF RELATIONSHIP KE AND PE HAVE? INVERSE

Law of the Conservation of Energy… S is NEVER created or destroyed! S can only be STORED or TRANSFORMED.

Examine an example of potential energy • What if the flower pot is lowered from a sill at 20 m from the ground to a sill 10 m from the ground: • Does this change the potential energy of the flower pot? Yes • When did it have more potential energy? When it was higher off the ground.

KINETIC AND POTENTIAL ENERGY ARE CONSTANTLY BEING EXCHANGED

Pe to Ke

Roller Coasters • As you move up to the first hill on a roller coaster the distance between the coaster and the Earth increases, resulting in an increas of Gravitational Potential Energy. • At the top of the first hill you have the most Gravitational Potential Energy • As you begin your trip down the hill you increase your speed resulting in a transformation from GPE to KE. • At the bottom of the hill right before it goes back upward the GPE is small, but the KE is Large. • As it starts to move up the next hill or loop KE is transformed back into GPE http: //www. youtube. com/watch? v=8 abzp. X Cjyj. A

Pendulum swing