1. Common exam results – Min 0 – Max 18, but graded out of 16 For this group, High 18, low 2 – Average 11.5 which corresponds to a ‘B’ What are the next steps? (a) If you did well, keep doing what you are doing… its working (b) If you did not do well, figure out what things you need to change. Did you do the HW problems? Are you coming to class? Do you need extra tutoring? Can you do the Practice problems but have difficulty with the exam problems? Start studying for the final exam NOW.

2. Is the energy conserved?

3. Iclicker Question #1
Which of the following characters from “The Big Bang Theory” is from New Jersey?
Sheldon Cooper
Leonard Hofstadter
Howard Wolowitz
Raj Koothrappali
Penny

4. Potential Energy of Spring

5. Iclicker Question #2
In which of the following is not a form of energy?
gasoline
Waves on the ocean
A mass which is not moving
light
Heat from a hot car engine

6. Iclicker Question #3 In which of the following is energy lost?
A swinging pendulum
A block sliding UP a frictionless incline
A block sliding across a rough floor
A meteor falling to earth
A collision of a rubber ball with the ground

7. Energy diagrams

8. Energy diagrams

9. Unstable Equilibrium in the Movies
Jurassic Park (1993)
“Living systems are never in equilibrium. They are inherently unstable. They may seem stable, but they’re not. Everything is moving and changing. In a sense, everything is on the edge of collapse.” ― Michael Crichton, Jurassic Park
Start at 1:00

10. Iclicker Question #4
In the movie ‘The Avengers’, what causes the ‘instability’ which causes Bruce Banner to change into The Hulk?
The Federal government shutdown
Too much caffeine...
Bruce Banner gets sad
Bruce Banner gets angry
Bruce Banner gets hungry