Potential and kinetic energy (PE and KE)
What is the overall relationship between PE and KE?
As PE decrease, KE increases. As PE increases, KE decreases.
As a roller coaster goes down a hill, what is happening to both PE and KE?
As it goes down a hill, PE is decreasing while KE is increasing.
As a roller coaster goes up a hill, what is happening to both PE and KE?
As it goes up a hill, PE is increasing while KE is decreasing.
When does a roller coaster have the least PE?
At the bottom of the first big hill (or lowest point).
When does a roller coaster have the most KE?
At the bottom of the first big hill (tallest hill).
When does a roller coaster have the least KE?
At the top of the first big hill (tallest hill).
When does a roller coaster have the most PE?
At the top of the first big hill (tallest hill).
Kinetic energy
Energy of motion. All moving objects have kinetic energy, no matter how slowly they are moving. More potential energy leads to more kinetic energy.
When you stretch a rubber band and then let go to shoot it, you are changing one form of energy to another. What form does it have most of when you let it go across the room?
Kinetic energy.
When you stretch a rubber band and then let go to shoot it, you are changing one form of energy to another. What form does it have most of when it's stretched (about to be shot)?
Potential energy.
Potential energy
Stored energy. It's energy in an object due to its position - as in a rock at the top of a hill or a roller coaster at the top of a hill. Also can be due to condition (such as shape - example: a stretched rubber band). 3 types - elastic, gravitational and chemical.
As a roller coaster goes up a hill, what is happening to its KE?
The KE is decreasing.
As a roller coaster goes down a hill, what is happening to its KE?
The KE is increasing.
As a roller coaster goes down a hill, what is happening to its PE?
The PE is decreasing.
As a roller coaster goes up a hill, what is happening to its PE?
The PE is increasing.
Gravitational potential energy
The kind of energy in a roller coaster at the top of a hill
Elastic potential energy
The kind of energy in a stretched rubber band
