Mark Sailer
Science Teacher
Pioneer Jr-Sr High

Physics     Name : ________________________________________

Momentum and Energy Unit – Chapter 7 and Chapter 8

Chapter 7

1. Define momentum
2. Define impulse, and describe how it affects changes in  momentum.
3. Explain why an impulse is greater when an object bounces than when the same object simple comes to a complete stop.
4. State the law of conservation of momentum.
5. Distinguish between an elastic collision and an inelastic collision
6. Give an example of how the vector nature of momentum affects the law of conservation of momentum.

Chapter 8

1. Define and describe work.
2. Define and describe power.
3. Define mechanical energy.
4. Define potential energy.
5. Define kinetic energy and describe the work-energy theorem.
6. State the law of conservation of energy.
7. Describe simple machines and mechanical advantage.
8. Explain why no machine can have an efficiency of 100%.
9. Describe the role of energy in living organisms.

State Standards addressed by this unit

 P.1.9 Use the conservation of energy and conservation of momentum laws to predict, both conceptually and quantitatively, the results of the interactions between objects. P.1.11 Recognize energy in its different manifestations such as kinetic (KE = ½ mv2), gravitational potential (PE = mgh), thermal, chemical, nuclear, electromagnetic, or mechanical. P.1.12 Use the law of conservation of energy to predict the outcome(s) of an energy transformation. P.1.14 Explain the relation between energy (E) and power (P). Explain the definition of the unit of power, the watt. P.1.15 Distinguish between the concepts of momentum (using the formula p = mv) and energy. P.1.16 Describe circumstances under which each conservation law may be used.

Class Plan

Day 1- Tuesday September 27, 2005 – C Layer Work – Momentum Notes

Day 2 – Wednesday September 28, 2005 – C Layer Work – Momentum Notes

Forces Unit Due – Unit Test

Day 3 – Thursday September 29, 2005– C Layer Work – Momentum and energy Activities

Day 4 – Friday September 30, 2005– C Layer Work – Energy Notes

Day 5 – Monday October 3, 2005– C Layer Work – Energy Notes

Forces Unit Retest

Day 6 – Tuesday October 4, 2005– C Layer Work – Energy Work and activities

Day 7 – Wednesday October 5, 2005 – C & B Layer Work

Day 8 – Thursday October 6, 2005– C & B Layer Work

Day 9 – Friday October 7, 2005– C, B & A Layer Work

Day 10 – Monday October 10, 2005– C, B & A Layer Work – Last day for C layer work to be checked in class

Unit Test – Wednesday October 12, 2005 – Unit Portfolio Due

C Layer (65 points maximum)

1.  Class discussion – Participate and take notes – (5 points each day) _____ _____ _____ _____  Total _____

OR  - videotapes Momentum (10 points) _____ Energy (10 points)  _____  Total _____

2.  Reading Log/Notes Chapter 7 (5 points)        _____

3.  Reading Log/Notes Chapter 8 (5 points)        _____

4.  Concept Development Practice Page 7-1 Momentum (5 points) Oral Defense (O.D.)   _____

5.  Lab 20 – Tailgated by a dart (15 points)        _____

6.  ESPN Sports Figures Video– Momentum and Impulse – In Golf Gravitas (5 points) O. D.  _____

7.  Lab 21 – Making the Grade (5 points)        _____

8.  Lab – Power to the People (5 points)        _____

9.  Lab 23 – Cut short (5 points)         _____

10.  Lab 25 – How hot are your hot wheels (5 points)       _____

11.  Concept Development Practice Page 8-1 – Work and Energy (5 points)  O. D.   _____

12.  Concept Development Practice Page 8-2 – Conservation of Energy (5 points)  O. D.   _____

13.  Concept Development Practice Page 8-3 – Momentum and Energy (5 points)  O. D.   _____

14.  Chapter 7 Assessment – p.100-102 –

# 2, 8, 9, 14, 16, 19, 22, 25, 26, 27, 29, 30, 31, 34 (10 points)  O. D. _____

15.  Chapter 7 – More Problem Solving – Show Work – p. 669-670 #1-10 (5 points)  O. D.  _____

16.  Chapter 8 Assessment – p. 119-121 –

#3, 4, 5, 7, 8, 9, 22, 23, 24, 27, 32, 33, 36, 38, 40, 44, 45 (10 points)  O. D. _____

17.  Chapter 8 – More Problem Solving – Show Work - p.672-674

# 1-4, 6, 9, 10, 12, 18, 20 (5 points)  O. D.   _____

18.  Create a poster, display or bulletin board to teach momentum and energy to others. (20 points)  O. D. _____

19.  The terms force, work, power, and energy often mean the same thing in everyday use. Obtain examples from advertisements, print media, radio, and television that illustrate meanings for these terms that differ from those used in physics.  (20 points)  O.D.         _____

The terms force, work, power, and energy often mean the same thing in everyday use.  Obtain examples from advertisements, print media, radio, and television that illustrate meanings for these terms that differ from those used in physics.  Create a poster or display showing the differences. (20 points) O. D.     _____

B Layer – (Choose one – 15 points – Experiment and Report)

1.  What is the best way to cushion an egg?

2.  What factors affect energy?

3.  Does the direction of the applied force affect the work done on an object?

4.  Investigate the amount of kinetic energy involved when your car’s speed is 60 km/h, 50 km/h, 40 km/h, 30 km/h, 20 km/h, and 10 km/h.  How much work does the brake system have to do to stop the car at each speed?  If the owner’s manual includes a table of braking distances at different speeds, determine the force the braking system must exert.  Organize your findings in charts and graphs to study the questions and to present your conclusions.

A Layer – (Choose one – 20 points)

1.  While air bags save many lives, they also have caused injuries and even death.  Research the arguments and responses of automobile makers to this statement.  Determine whether the problems involve impulse and momentum or other issues.  Do the good points outweigh the bad points? – Use an A Layer Research Form

2.  Obtain a videotape of one of your school’s sports teams in action(or another sporting event.)  Create a play-by-play description of a short segment of the videotape explaining how momentum and kinetic energy change during impacts that take place in the segment.  Share this play by play with the class.

C Layer Points Earned ________ B Layer Points __________ A Layer Points _________

TOTAL ________________

Grades   40-55 D  56-70  C  71-85 B  86+ A