Types of Energy
Energy stored inside the nucleus of an atom. When a nucleus splits, energy is released (fission).
What is nuclear energy?
Plugging in a floor lamp is an example of this energy transformation.
Electrical Energy --> Light Energy
What will ALWAYS be true of an object possessing a kinetic energy of 0 joules?
The object is at rest
What will ALWAYS be true of an object possessing a potential energy of 0 joules?
The object is moving
Push It
Do 10 push ups
Devices such as televisions, computers and CD players are operated by this form of energy.
What is electrical energy?
Rubbing your hands together is an example of this energy transformation.
Mechanical Energy --> Thermal Energy
A small racing car has a mass of 1500-kg. What is its kinetic energy if it has a speed of 30.0 m/s?
675000 J
How much potential energy does Tim, mass 60.0-kg, gain when he climbs a gymnasium rope a distance of 3.5 m?
2050 J
Trivia
What does a light-year measure?
The total kinetic energy of particles. The higher the kinetic energy of the particles, the higher the temperature of the object.
What is thermal energy?
The definition of the law of conservation of energy.
Energy cannot be created or destroyed, only transformed from one form to another.
A shot-putter heaves a 7.26-kg shot with a final velocity of 7.50 m/s. What is the kinetic energy of the shot?
204.19 J
A hallway of energy is constructed. People are told that to do 2.00 J of work, they should pull on a rope that lifts a block 1.00 m. What should be the mass of the block?
0.204 kg
Karaoke
Sing a SCHOOL APPROPRIATE song of your choice for 15 seconds
The total sum of kinetic energy and potential energy an object possesses, representing its capacity to perform work.
What is mechanical energy?
Eating breakfast before going on a bike ride is an example of this energy transformation.
Chemical Energy --> Mechanical Energy
Calculate the mass of an object that possesses 26.1 J of kinetic energy when moving at a speed of 8 m/s.
0.816 kg
A 10.0-kg rocket is fired vertically from Cape Canaveral. Its fuel uses 1960 J of energy by the time the rocket motor burns out of fuel. How high will the rocket rise?
20 m
Dance Dance
Perform an interpretive dance for 15 seconds to a song selected by Ms. Gomez
A form of electromagnetic energy that moves in waves, produced by hot objects or through artificial sources.
What is light energy?
A plant undergoing photosynthesis is an example of this energy transformation.
Light Energy --> Chemical Energy
A 7 kg object has 350 J of kinetic energy. Find the velocity of the object.
10 m/s
Mary weighs 500-N and walks down a flight of stairs to a level 5.50 m below her starting point. What is the change in Mary’s potential energy?
2750 J
Impression
Do your best impression of Ms. Gomez (30 sec)