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An alternate approach to analyzing the behavior of matter involves the use of something physicists call momentum. Momentum is similar to inertia, but quantified. Closely related to Newton's Laws, much of what can be described by these laws can also be described through the use of momentum. You will see that momentum is most frequently used when analyzing the behavior of object immediately before and after collisions and explosions. So hang on to your seats, this may be a little more exciting. Forces applied to an object, over a distance, and in the direction of the object's motion change it's behavior. When this happens physicists say that work is done to that object. Which is a fancy way of saying the object is moving faster, slower, or has changed position. The term energy is closely associated with work. In fact, one definition of work is the consumption or output of energy (depending on whether the work is positive or negative). In any event, we will be learning about another method physicists use to analyze the behavior of nature--energy. And, unlike Newtonian Mechanics, the laws governing energy hold under the principles of relativity so you'd better pay attention, 'cause this stuff ain't going away. | ||||
| For your test you should be able to: | ||||
| 1) Define the following vocabulary words: | ||||
| Energy | Work | Kinetic Energy | Potential Energy | |
| Conservative force | Non conservative force | Work/energy theory | Mechanical Advantage | |
| Power | Equilibrium | Stable | Unstable | |
| Momentum | Impulse | Conservation of Momentum | Collision | |
| Inelastic Collision | Perfectly Inelastic Collision | Elastic Collision | Explosion | |
| Energy | Thrust | |||
| 2) Use conservation of energy to determine position or velocity. | ||||
| 3) Determine the work done on an object. | ||||
| 4) Identify stable and unstable equilibrium points. | ||||
| 5) Discuss how path independence relates to conservation and non conservation forces. | ||||
| 6) Use momentum and energy to solve conservative collision problems. | 7) Use conservation of momentum to solve for velocity. | |||
| 8) Solve for momentum when collision occur in 2 dimensions. | ||||
| 9) Understand the relationship among force and impulse. | ||||
| 10) Describe how Newton's third law proves conservation of momentum. | ||||
| 11) Explain how rockets take off from the ground or fly through space. | ||||
| Reading Supplements: | ||||
| Conceptual Physics chapters 7 (momentum) and 8 (energy) | ||||
| Assignment Handouts: | ||||
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Impulse Conservation of Momentum Work Conservation of Energy Momentum and Energy |
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| Schedule: | ||||
| Date | Lesson | Assigments | Reading | |
| Nov 29 | Momentum and Impulse | Ch 7: 1,2,4-10,19,20,34 | Ch 7 and lecture notes | |
| Dec 1 | Conservation of Momentum | Ch 7: 11,12,12-18,21,22,37,38 | Ch 7 and lecture notes | |
| Dec 2 | Work and Energy | Ch 8: 1-11,21-23,25-27 | Ch 8 and lecture notes | |
| Dec 3 | Conservation of Momentum Experiment | Ch 7: 23-26,28,29 and write up | Ch 7 | |
| Dec 6 | Work, Energy, and Power Activity | Ch 8: 31-34,36,42 and write up | Ch 8 | |
| Dec 7 | Problem Solving | Impulse Worksheet | Notes | |
| Dec 8 | Problem Solving | Conservation of Momentum Worksheets | Notes | |
| Dec 9 | Problem Solving | Work Worksheet | Notes | |
| Dec 10 | Problem Solving | Conservation of Energy Worksheet | Conservation of Energy Worksheet Answers | Notes |
| Dec 13 | Collisions demos/activities | Momemtum and Energy worksheet | ||
| Dec 14 | Concepts Review | Notes | ||
| Dec 15 | Practice | Notes | ||
| Review for Test: Dec 15 | ||||
| Test: Dec 16 (with allowances for time) | ||||
| Comments, questions? Drop me a line. | ||||