Potential Energy
Kinetic Energy
Energy Conversion
Energy Diagrams
General Science
100
What is potential energy?
Stored energy
100
What is kinetic energy?
The energy of motion
100
What happens to the GPE of an object as it falls?
The GPE decreases because it is converted to kinetic energy as it falls.
100
Two variables have a(n) ________ relationship if they both increase or decrease together.
direct
100
What is an independent variable in an experiment?
The variable that the scientist changes.
200
What are three types of potential energy?
Gravitational, Elastic, and Chemical
200
What two factors impact kinetic energy?
Mass and speed
200
What type of energy conversions takes place when shooting a bow and arrow?
Elastic potential energy is stored in the bow when it is stretched back. When the bow is released the elastic potential energy is converted to kinetic.
200
Two variables have a(n) _________ relationship if one increases while the other decreases.
Inverse
200
An object at rest will stay at rest unless _______.
acted on by an outside force.
300
Which of the following does not represent energy being converted?
A. Stretching a rubber band then letting it go
B. Dropping a ball
C. Playing with a yo-yo
D. A book sitting on a desk
D. A book sitting on a desk has potential energy, but it is not being converted into any other type of energy.
300
You have a large mug with hot tea and a small mug with ice tea. Which mug has more thermal energy?
Explain your answer.
The large mug with hot tea has more thermal energy because the it has more mass and a hotter temperature.
300
A student drops a ball from 5 feet above the ground. After bouncing once, it only reaches a maximum height of 4 feet above the ground. Use energy terms to explain why the ball did not reach its original height after bouncing once.
The ball never returns to its original height because some of the energy is converted into height and sound energy, not back into kinetic energy.
300
At point X because the GPE from the highest point had been converted into Kinetic energy.
300
What is the dependent variable in an experiment?
The variable that is impacted by the independent variable.
400
What are the factors that influence the amount of elastic energy in an object?
Compression, stretching, and hardness
400
Which object will have more kinetic energy?
A. a 50 g rock dropped from 100m
B. a 30 g rock dropped from 90m
A. Because it has more mass and was dropped from a higher point meaning it had more GPE
400
There is a skateboarder at a skate park. What energy does he start with and what is it converted into as he rolls down the ramp?
Starts with GPE, that is converted into kinetic and thermal energy.
400
What energy type(s) is present at point Z? Explain your answer.
At point Z the rollercoaster will have both KE and GPE as well as thermal energy.
400
Who discovered the three laws of motion?
Sir Isaac Newton
500
What is the formula for Gravitational Potential Energy (GPE)?
GPE = mass x height x gravitational acceleration (9.8m/s^2)
500
What is the formula for kinetic energy?
500
As a skateboarder starts to roll back up the ramp what types of energy does he have and what is it being converted to?
As he rolls back up his Kinetic energy is being converted into GPE again and some thermal energy from the friction.
500
What type of relationship do Kinetic energy and potential energy have in an object that is falling?
Inverse relationship. As one increases the other decreases
500
Electricity is created by the flow of what particle?
Electrons