ENERGY
Energy is involved in every change that occurs
Energy can be found in many different formsex) thermal, electrical, chemical, etc.
KINETIC ENERGY
Kinetic energy is energy in the form of motion.
Kinetic energy depends on both the mass and the velocity of a moving object.
KINETIC ENERGY
Determine the kinetic energy of a 625 kg roller coaster car that is moving with a speed of 18.3 m/s.
KINETIC ENERGY
If the roller coaster car in the previous problem were moving with twice the speed, then what would be its new kinetic energy?
POTENTIAL ENERGY
Potential energy is the stored energy due to an object’s position.
There are 3 types of potential energy.
POTENTIAL ENERGY
Elastic potential energy is the energy stored in something that can stretch or compress.
ex) a rubber band or a spring
POTENTIAL ENERGY
Chemical potential energy is the energy stored in chemical bonds.
ex) gasoline or food
POTENTIAL ENERGY
Gravitational potential energy is the energy stored by objects above the Earth’s surface.
POTENTIAL ENERGY
Gravitational potential energy is the energy stored by objects above the Earth’s surface.
Gravitational potential energy depends on both the mass and the height of an object.
POTENTIAL ENERGY
GPE = m x g x h
GPE = gravitational potential energy (Joules)
m = mass (kg)g = gravity (9.8 m/s2)
POTENTIAL ENERGY
GPE = m x g x h
GPE = gravitational potential energy (Joules)
m = mass (kg)g = gravity (9.8 m/s2)h = height (m)
POTENTIAL ENERGY
Wile E. Coyote has a mass of 50 kg. While chasing the Roadrunner, he accidentally runs off the edge of a cliff 60 meters high. What is his gravitational potential energy?