A LITTLE MORE ENERGY
TYPES OF ENERGY
1.
What type of energy has to do with heat? ___________________
2.
What type of energy has to do with bonds between atoms? ________________
3.
What type of energy has to do with electrical charges? _________________
4.
What type of energy has to do with electromagnetic waves? ___________________
5.
What types of energy do we get from the sun? ____________________
ENERGY TRANSFORMATIONS AND CONSERVATION
6.
Can a bouncing ball have kinetic and potential energy at the same time? EXPLAIN
7.
If you are skateboarding and you are standing still at the top of a ramp, you have ________________. When you start to
roll downhill, that energy is converted into ________________. If you put your foot on the ground to help you stop, some
of the Kinetic energy is converted into _______________ because of friction.
Gravitational Potential Energy: GPE = Mass*gravity*height
8.
A model glider has a mass of 1 kg. How much potential energy does it have 2 meters off of the ground?
9.
Hugh G. Pecks lifts a 250kg barbell over his head, a distance on 3m all in 2 seconds. How much potential energy is
now stored above Hugh’s head?
Classify the following examples as potential energy or kinetic energy.
10. A bird sitting in a tree ______
11. A bird flying through the air_____
12. A roller coaster at the bottom of the first hill _____
13. A chicken on a barn roof ______
Energy Transformations: For the following scenarios, describe the transformation of energy occurring.
14. A flashlight is turned on and gives off light. __________________________________________
15. An electric stove is turned on to boil water.__________________________________________
16. A yodeler yells in the mountains and causes an avalanche to fall.___________________________
17. A catapult is stretched backwards and fires a large boulder at a castle.________________________
18. A child sits at the top of a slide and slides down. ________________________________________
19. Describe the relationship between potential and kinetic energy as a ball is rolled down a hill.
WORK or NO WORK?
For each statement below, write W if work if being done, and NW is work is not being done.
20. I carried my books upstairs to my bedroom. ______________
21. The wind blew the lawn chair across the yard _______________
22. The wall in my classroom won’t budge no matter how hard I push it ______________
23. I blew some dust off my paper ___________________
24. I balanced a book on my head _________________
WORK AND POWER
25. Which requires more work: lifting a 15 N load a distance of 3 meters, or lifting a 7 N load a distance of 10 meters?
Explain.
26. A boy pushes a car with a force of 75 N. The car does not move. How much work has he done?
27. A crane does 12,500 Joules of work lifting a 360 kg a total distance of 500 meters. What is the total force needed by
the crane?
28. A zookeeper does 8,500 Joules of work over 20m by lifting a 180 kg bear out of his cage . What is the total force
needed by the zookeeper?
29. If a 400kg bike is pushed for 20m and accelerates at 2.3m/s2, how much work is being done on the bike?
NUCLEAR ENERGY
Fission
Where do we see this
process occur?
What is the starting
atom?
What are the products
of the reaction? (What
do we end with?)
Sketch me a diagram of
what is occurring.
Fusion