1. Today’s special HW check - Vocab 6 Test results Standards
Video on Energy
Notes 6 Work and Energy
HW I due next time!
Movie
Lab next time…

2. Work and Energy
PAf.1: Explain how the law of conservation of energy applies to the transformation of various forms of energy (including mechanical energy, electrical energy, chemical energy, light energy, sound energy, and thermal energy).
PAf.2: Explain the factors that determine potential and kinetic energy and the transformation of one to the other.
PAf.3: Explain work in terms of the relationship among the force applied to an object, the displacement of the object, and the energy transferred to the object.
PAf.4: Use the formula W = Fd to solve problems related to work done on an object.
PAa.1: Generate hypotheses on the basis of credible, accurate, and relevant sources of scientific information.
PAa.2: Use appropriate laboratory apparatuses, technology, and techniques safely and accurately when conducting a scientific investigation.
PAa.9: Use appropriate safety procedures when conducting investigations.

3. We must always change, renew, rejuvenate ourselves; otherwise we harden.
Johan Wolfgang von Goethe
Fact: The average lifespan of a major league baseball: 7 pitches.

4. Work = force x distance Work is only done if an object moves!
Measure in N*m, or the joule (J)

5. James Prescott Joule,
English physicist and brewer, born in Salford, Lancashire. Joule studied the nature of heat, and discovered its relationship to mechanical work. Wikipedia

6. Power
Work/time
Work done per period of time, it is a rate of how fast work is done
Measured in joules/second = watt

7. James Watt,
Scottish inventor and mechanical engineer whose improvements to the Newcomen steam engine were fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world. Wikipedia

8. Potential energy Energy of position PE = mgh
Usually work is done on an object to give it potential energy
Can be mechanical or chemical

9. Kinetic energy The energy of motion KE = ½ m*v2
= ½ times the mass of the object times the speed squared

10. Energies are related
Energy can be transformed from one form to the other with work
                                       

11. Work-Energy Theorem
Work = ΔKE
F * d = ½ m * v2

12. HW due next time: Chapter HW: pp. 98-101
I. Review questions2-20 even (due date: ____________)

13. Today’s special ISS tour 3 HW I check; Q & A Energy Lab: due next!
E.S.B.

15. Today’s special ISS tour 4
Momentum Lab & Energy lab due (turn in now on front desk)
Some notes
HW II due next
Energy graphic organizer
Rubber band cars planning (design & supplies)

16. Conservation of energy
Energy cannot be created or destroyed; it may be transformed from one form into another or transferred from one object to another, but the total amount of energy never changes

17. Simple machines

18. Efficiency Work done/energy used
Heat engines can never be 100% efficient

19. Sources of energy

20. Homework Chapter HW: pp. 98-101
II. Exercises 2-20 even; Problems 1-9 (due date: __________)

21. Today’s special HW II check Practice test
Rubber band car work time/supply check
Test & car race next time!

22. Today’s special Turn in Practice test on front desk
Test 6 Work and Energy
Enter answers in Smartresponse, turn in paper test with sentences & essay/math problem
Work silently reading & doing vocabulary (without talking) until ALL have finished testing
Race day!
Vocab 7 due next class!