Kinetic Energy
Potential Energy
Trivia
Math Problems
Energy Transformations
100
What is the equation to find the kinetic energy of an object?
EK = 1/2mv² (1/2 x mass x velocity²)
100
What is the equation to find the potential energy of an object?
EP = mgh (mass x gravity x height)
100
What is energy?
The ability to cause change or do work.
100
What is the Kinetic Energy of a 100 kg object that is moving with a speed of 12.5 m/s?
7812.5 J
100
List the energy transformations (3): A battery-operated flashlight.
Chemical - electrical - radiant.
200
What are the 5 types of kinetic energy?
Mechanical, Thermal, Sound, Electrical, and Radiant
200
What are the 4 types of potential energy?
Chemical, Nuclear, Gravitational, and Elastic.
200
What unit is energy measured in?
Joules (J).
200
Former Minnesota Vikings Quarterback Brett Favre throws a football at a speed of 35 meters per second. If the weight of the football is 0.4 kg, what would the kinetic energy of Brett Favre’s pass be?
245 J
200
List the energy transformations (3): A windmill.
Kinetic motion (wind) - mechanical - electrical.
300
What is the definition of thermal energy? Give an example.
Energy produced when a rise in temperature causes atoms and molecules to move faster and collide with each other.
Ex: heating something up on the stove, baking brownies in the oven, etc.
300
What is the definition of elastic energy? Give an example.
A form of potential energy which is released through compression or stretching.
Ex: A coiled spring, stretched rubber band, slingshot, etc.
300
What is the difference between an open system and a closed system?
Open systems exchange energy and matter and closed systems only exchange energy.
300
Mrs. Monroe decides to break the Guinness Book of World Records for bungee jumping. She goes to the Macau Tower in China where the current record is held. After several heart-pounding seconds, she leaps from a height of 233 meters. If her weight is 50 kilograms, what would her potential energy be just prior to jumping?
114170 J
300
List the energy transformations (3): An electrical mixer, mixing a batter to make a cake.
Electrical - mechanical - sound.
400
What is the definition of electrical energy? Give 2 examples.
Energy produced by the movement of electrons.
Ex: lightening, a light bulb, electrical lines, etc.
400
What is the definition of gravitational energy? Give 2 examples.
The energy held by an object when it is in a high position compared to a lower position.
Ex: Pendulum, skydiving, roller coasters, the planets, sun, etc.
400
What is the Law of Conservation of Energy?
Energy can not be created or destroyed. It can only be transferred.
400
With an elevation of 5334 m above sea level, the village of Aucanquilca, Chile is the highest inhabited town in the world. What would be the gravitational potential energy associated with a 64 kg person in Aucanquilca?
3345484.8 J
400
List the energy transformations (4): A firework.
Chemical - thermal - radiant - sound.
500
What is the definition of sound energy? Give 2 examples.
The movement of energy through substances. It moves in waves and is produced when a force makes an object or substance vibrate.
Ex: Talking, singing, playing an instrument, etc.
500
What is the definition of nuclear energy? Give 2 examples.
The energy stored in the nucleus of atoms. This energy is released when the nuclei are combined (fusion) or split apart (fission).
Ex: Nuclear power plants, bombs, the sun, etc.
500
What is work? What is the equation?
A force applied through distance.
Equation: W = FD (work = force x distance)
500
The Royal Gorge Bridge is situated 321 m above the Arkansas River in Colorado. If the gravitational potential energy associated with a tourist on the bridge is J with respect to the river, what is the tourist’s mass?
54.99 J
500
List the energy transformations (4): Burning of coal to make steam, which turns a turbine to make electricity.
Chemical - thermal - mechanical - electrical.
