Download Energy review 2016 - Mayfield City Schools

Energy Review
Name: ________________________
Fill in:
1. The energy associated with the motion and position of an object. is known as ___________________________
It is the sum of potential energy and kinetic energy.
2. _________________________ is a quantity that is related to the ability of an object to change or cause change.
3. _________________________ is the unit for energy.
4. In a _________________________ system, energy is always conserved.
5. What are the 2 main classes of energy?
-
Energy related to motion
- Energy related to being stored
_________________________________
______________________________
What are the 5 types of energy?
(what is moving)
What are the 5 types of energy?
(where is energy being stored)
1. _______________________________________
1. ___________________________________
2. ___________________________________
2. ___________________________________
3. ___________________________________
3. ___________________________________
4. ___________________________________
4. ___________________________________
5. ___________________________________
5. ___________________________________
Name an object that undergoes the following energy transformation:
1. Chemical to electrical
_______________________
2. Chemical to kinetic motion
_______________________
3. Chemical to Radiant (light)
_______________________
4. Kinetic motion to Thermal
_______________________
5. Kinetic motion to Radiant (light)
_______________________
6.
Kinetic motion to electrical
_______________________
7. Nuclear to Thermal
_______________________
8. Nuclear to electrical
_______________________
9. Electrical to Thermal
_______________________
10. Electrical to kinetic motion
_______________________
Energy Transformations:
Complete the transformations below, be sure to provide the types of energy and a picture or explanation.
a) You travel to California for spring break and need to charge your phone. As you look out at the
horizon you see wind mills in the distance.
b) You throw a baseball up into the air.
c) Use the diagram to the right - explain the transformations from when the ball is released at Point
A to when it is caught at Point G.
d) What can be said about the GPE @ D compared to MKE @ G?
What can be said about the GPE @ B compared to MKE @ F?
What can be said about the GPE @ A compared to MKE @ D?
Conservation of Energy Worksheet
Show all Work!
1. A 1000 Kg car is resting at the top of a 43 m hill. How much energy does the car currently have?
What kind is it?
2. How fast is the car (from #1) moving at the bottom of the hill if friction is neglected?
3. How fast is the car from #1 moving when it gets half of the way down?
How much potential energy does the car have at this point?
How much kinetic energy does the car have?
4. An 80 Kg snowboarder is riding a half-pipe that is 15 m deep. If she begins at rest, how fast will
she be traveling if there is no friction when she is at the bottom of the pipe?
5. From problem #4, how high up the other side will she be when she comes to rest?
Law of Conservation of Energy and Efficiency
1. Kate plugs in her hair dryer. The device uses 12,000 J of energy. 8,500J is converted to motion to move the
inner fan, 500J is converted to sound, and 1,500 is converted to thermal energy. Does this support the law of
conservation of energy? Explain.
2. How efficient is the hair dryer___________________
3. Brian sits down to study for tomorrow's test. He turns on his desk lamp so he can read the textbook. The lamp
uses 2,000J of energy. 1,925J of energy is used to light the bulb. As he studies he realizes that his papers are
warm under the lamp. 75J of energy is converted into heat.
What energy transformations are related to the lamp?
4. How efficient is the lamp ______________________
5. Calculate the GPE at Point A. Show all work.
What is the height of the coaster at Point A?
Show all work.