Potential Energy
Define Potential Energy
Stored energy based on HEIGHT
Define Kinetic Energy
Energy in Motion
True or False. The total energy in a system (or roller coaster) from start to finish will ...
A. Increase
B. Decrease
C. Stay the same
What is Mrs. Candurra's favorite FOOD?
Buffs or Pizza!
Where on a roller coaster does the cart have maximum potential energy?
Top of the first hill
At the bottom of the first hill.
As the MASS of something increases, its total energy will...
a. increase
b. decrease
c. stay the same
Also, increase!
As the mass of something increases, the total energy required has to also increase!
Where on a roller coaster is there the least potential energy?
At the bottom of the ride
Where on a roller coaster does it have DECREASING kinetic energy?
going up any hill or coming to a stop at the end.
Which law says that energy can't be created or destroyed, just transferred?
The Law of Conservation of Energy
A bird is sitting on top of a 10-meter high building and has a mass of 8 kilograms. What is its potential energy?
PE: 9.8 x mass x height
PE: 9.8 x 8 x 10
PE: 784 J
A toy plane is flying at a velocity of 30 m/s and has a mass of 20 kilograms. What is its kinetic energy?
KE: 1/2(m)(v2)
KE: 10 x 900
KE: 9000 J
Who will have more potential energy?
A cart on Tower of Terror that has a mass of 20 kilograms and a height of 100 meters
OR
A cart on Rockin' Roller Coaster that has a mass of 40 kilograms and a height of 60 meters.
T of T: 19,600 J
RR: 23,520 J
Rockin' Roller coaster!
A roller coaster cart has a mass of 15 kilograms and is at a height of 40 feet above the ground. What is the carts potential energy?
PE = 9.8 x Mass x Height
PE: 9.8 x 15 x 40
PE: 5880 J
A snowboarder has a mass of 40 kilograms and is traveling at a velocity of 10 m/s. What is the snowboarder's kinetic energy?
KE: 1/2(m)(v2)
KE: 20x100
KE: 2000 J
Which has a greater kinetic energy?
JOSH: Someone with a mass of 60 kilograms riding their bike at a velocity of 10 m/s
OR
LUCAS: Someone with a mass of 50 kilograms riding their bike at a velocity of 20 m/s.
Josh:3,000 J
Lucas: 10,000 J
LUCAS!