Kinetic Energy
Using the following words, explain:
* mass * kinetic energy * velocity *
Why would an elephant running at 30 kph into a gazelle cause more injury than a elephant running at 20 kph?
The elephant running at 30 kph has a higher velocity than the one running at 20 kph, so it will have a higher KE.
Higher KE --> takes more energy to stop.
Give examples of parts of a machine that could have potential energy.
Coils, springs, etc.
The sum of the KE & PE in an object is called ____________________.
What is thermal energy?
False!
Describe one of Newton's Laws
Answers vary.
"Energy can never be created nor destroyed."
What is this law called?
Law of Conservation of Energy
Why is PE also called "GPE"?
GPE because the G stands for PE caused by gravity. Gravity on earth has the same pull, so it is a constant.
Q, in science stands for: _______________
Thermal, radiant, electrical, nuclear
What are types of energy?
Why is the metric system used in the scientific community?
Also, name 1 metric unit.
B/c it is units of 10 & it creates a standardized unit of measurement.
Units: kg, K, m, etc.
If energy can never be created nor destroyed, what happens to the kinetic energy of a moving object when it stops moving?
The KE is transferred into another type of energy- might be potential, or some other type of energy.
A Viking ship roller coaster at the fair has a mass of 36,000 kg. If at its peak it reaches a height of 20 m off the ground, how much GPE does it have?
20 m x 9.8 m/s2 x 36000 kg = 7,056,000 J
Conduction, convection, and radiation are all types of what...?
Also, describe the difference between a conductor and an insulator.
These are all types of thermal energy.
A conductor allows heat to flow through.
An insulator prevents heat/slows down the flow of heat.
Your phone uses _____________ type of energy to transmit its signal.
Electromagnetic
When was Diet Coke invented?
1982
Tommy, who weighted 75 kg, was running up stairs at 3 mph.
His KE was 2 J.
1/2 (75) (3) = 2
Define GPE
GPE = Gravitational Potential Energy = "energy stored in objects that are above Earth's surface"
GPE = ham
T/F: There is no such thing as "cold"?
Also, explain your answer.
Cold is relative and it is the absence of heat.
Give an example of when chemical energy might change into thermal energy.
Fireworks
T/F Avocados are a fruit not a vegetable?
True
Explain a situation in your real life, where you observed or experienced Kinetic Energy.
You must use the following words:
mass
velocity
Kinetic energy
* Answers Vary *
Name 3 different types of PE - and give 2 specific examples
Elastic, chemical, gravitational
What 2 factors affect the amount of thermal energy something has?
Mass and temperature!
Describe a situtation in which energy might change forms 3 times.
Answers vary.
Who won the 2022 World Cup?
Argentina