1. Introduction to Energy… and so much more!
And you

2. There is A finite amount of Energy in the Universe.
We do not create or destroy Energy
Energy is transformed from one form into another form.
No creation of Energy – only conversions!

3. Energy KE, gPE, TE, EPE … (we will discuss later) Units: Newton meter
= kg (m/s2) (m) = kg m2/s2 =
Joule

4. Notice that: The Newton is a unit of Force
The meter is a unit of displacement

5. Can we like… visualize the energy man???
You Bet!!

6. With an energy profile!!!!
But first let’s define a few key terms and equations that allow us to quantify energy relationships…
Like bummer man – why do we need to put numbers to feelings??
Because saying “your aura is like glowing man” does not really communicate just how much it is glowing…

7. Energy Conversions The energy of motion: Kinetic Energy (KE = ½ mv2)
The energy of the force of gravity: Gravitational Potential Energy
(GPE=mgh)
The energy in springy things: Elastic Potential Energy
(EPE = ½ kx2)
The energy due to frictional interactions: Thermal Energy
(TE = Ffr * Δx)

8. A few examples of energy profiles to get you started…

9. 1
A 500g box slides across a table, goes off the edge at 1.5m/s and then falls 90cm to the floor. Ignore friction. What do the gPE and KE look like on a E profile? E t

10. 1 answer
A 500g box slides across a table, goes off the edge at 1.5m/s and then falls 90cm to the floor. Ignore friction. Red = KE Blue = gPE E t

11. 2
A 100g ball is thrown vertically upward at 10m/s, then returns to the ground. Ignore friction. gPE and KE E t

12. 2 answer
A 100g ball is thrown vertically upward at 10m/s, then returns to the ground. Ignore friction.
gPE = blue, KE = red E t

13. Hand out lab papers to discuss Energy profile activity

14. What forms of E should be on your Energy profile?
Gravitational PE = mgh
Kinetic E = ½ mv2
Thermal E = Ffr * Δx (mirror image of decay curve)
Elastic PE = = ½ kx2
Total E of system
Also a decay curve should be on your profile
A name and title would also be nice
Color coded with a key!!!

15. Pre-lab if time permits…