Mechanical Energy
Non-mechanical Energy
Labs
Conservation of Energy
100
True or False
Kinetic energy is the amount of potential energy an object has when it falls and is pulled down by gravity.
False. This is gravitational potential energy.
100
List all four forms of non-mechanical energy described today.
Chemical
Sound
Thermal
Light
100
What forms of energy can be seen in the sparkler demonstration?
heat, light, and sound.
100
True or False.
The amount of energy in the universe will remain the same, and is conserved.
True
200
What has more kinetic energy?
A stationary bowling ball or a baseball being thrown by a pitcher?
The baseball
200
Do unstable substances have more or less chemical potential energy?
More.
200
What can we conclude about citrus juice based on its reaction with fire?
It is very unstable and has a lot of chemical potential energy
200
True or False.
When a ball is sitting on top of a building it has no energy, but when it falls it creates kinetic energy.
False.
The amount of energy in the ball remains the same, the energy is just changed into kinetic energy.
300
What kind of energy does spring have, that a wooden log does not?
Elastic Potential energy.
300
What types of non-mechanical energy does fire produce?
Thermal, light, and sound.
300
How does the combination of vinegar and baking soda demonstrate chemical energy?
When the reaction occurs the new gases made cause the release of energy.
300
When energy is lost, what type of energy is it usually conserved as?
Thermal energy.
400
Think About it.
If two identical Balls are dropped from a building and it takes Ball A 2 seconds to hit the ground, and Ball B 10 seconds to hit the ground, which has more gravitational potential energy and why?
(I never said they were dropped at the same height).
Ball B. If it took longer for it to fall then it was higher up than ball A, meaning it has more gravitational potential energy.
400
Do 10 grams of skittles have more or less chemical potential energy than 10 grams of wheat bread?
If we were to light both of them fire which would burn more?
10 grams of skittles.
Skittles
400
When the two balls were together, what types occurred?
How does this demonstrate the conservation of energy?
Kinetic, sound, thermal
It demonstrates how energy is always conserved, as the kinetic energy is made into sound, and thermal energy.
400
In the PhET simulation the skateboarder would have the same amount of gravitational potential energy, and kinetic energy forever. In reality, would this occur?
No. There would be friction reality which is almost impossible to completely get rid of, which would cause the gravitational potential energy and kinetic energy to be changed to thermal energy
500
How much kinetic energy (joules) does this bowling ball have? (The equation for kinetic energy is below)
m=mass
v= speed
mass= 4 grams
Speed= 1 meter per second
2 joules
500
What is light energy composed off?
Electromagnetic radiation.
500
What does the Eulers disk show about gravitational potential energy, kinetic energy, and conservation of energy?
Demonstrates how the gravitational potential energy is conserved as kinetic energy, which is then conserved in the form of sound energy as the disk spins.
500
As the seasons progress the amount of sunlight (a form of light energy) New Jersey gets changes. Based on what you know about the conservation of energy describe how the amount of sunlight we receive causes the seasons to change temperatures.
The sunlight is conserved in the form of thermal energy when it reaches the earth's surface, so the less sunlight we receive the decrease in the temperature.