1. Warm-Up Thurs. 4/5/07
For #1 and #2, write-out important variables and your answer.
Mr. Jackson is holding a 2kg water-balloon meters above the ground from the window of room 723. What is the Potential Energy stored in the water-balloon?
Mr. Jackson “accidentally” drops the water-balloon on Gustavo, who is lying flat on the ground. The balloon falls for 0.5 seconds before exploding all over Gustavo and his XXL blue t-shirt. How much Kinetic Energy does the balloon have right before it hits Gustavo?
How do your answer’s from #1 and #2 compare? Why do you think this is?

2. Law of Conservation of Energy
NEVER created or destroyed
CAN be change FORMS
CAN be transferred from one OBJECT to another
TOTAL amount NEVER changes!!!

3. Energy can… Change form! Be transferred from object to object! EX:
Sunlight
Chemical Energy
Heat
Be transferred from object to object!
Sun  Plant  Coal  Electricity!

4. ENERGY IS ALWAYS
CONSERVED!

5. Energy is conserved in a Pendulum
Ok…so what the ____K is a “Pendulum?!”
Draw this in your notes…
HEC

6. EX: The Circus Diver Look at p. 92, Fig. 6.15
While we’re here, draw the diagram in “Calculation Corner.” (Above p.92)
Fill-in the remaining values for PE and KE by yourself!

7. Practice, Practice, Practice…
Conservation of Energy worksheet.
When you’re done turn-it in
Start your homework