REVIEW
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Title Page
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This text is meant to accompany class discussions. It is not everything there is to know about energy. It is meant as a prep for class. More detailed notes and examples are given in the class notes, presentations, and demonstrations linked below under unit resources. |
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Table of contents |
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Units Resources |
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Introduction to energy in a "Perfect World" |
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Application of the conservation of mechanical energy |
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Work as a transfer of energy |
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This is the introductory inquiry activity. It is a conceptual look at energy, height and speed. |
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This is the student workbook containing a nearly all of problems that I use. It is in 4 or more pdf files. |
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Objectives |
Students will be able to: |
- For all equations, write what each variable stands for and its S.I. unit.
- Identify the correct S.I. units for ALL forms of Energy.
- Recall the name of the person who the energy unit is named after.
- Write the equation for kinetic energy.
- Define kinetic energy.
- Identify when an object possesses kinetic energy.
- Calculate the kinetic energy of an object.
- Write the equation for potential energy due to gravity.
- Define potential energy.
- Identify when an object possesses potential energy.
- Calculate the potential energy of an object.
- Solve problems based on conservation of mechanical energy. -Neglect friction and normal forces.
- Correctly identify the S.I. unit of “work.”
- Define what “work” is.
- Write the equation for “work.”
- Calculate “work” when the force and displacement are parallel.
- Calculate “work” when the force and displacement are not parallel.
- Identify “work” as being positive or negative.
- Identify “work” as being done “on” or “by” the system.
- Calculate the work on a graph of force vs. displacement.
- Solve problems using energy – work relationships and ratios.
- Solve problems involving up to all two types of energies and work.
- Recall the person who the unit of power is named after.
- Write the two equations for power.
- Define power 2 ways –in terms of work and in terms of force.
- Calculate the power delivered or received by an object
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Introduction |
Energy describes the ability to move a body by performing work. "Work" is the term used to describe how energy is exchanged. If energy it given to a football player from another player, then a physicist says one player "does work on" the other player. More about work later.
Energy is conserved. In a closed system, there is "X" amount of energy. A system is a collection of bodies that interact with each other but are isolated from their surrounding environment. A system could also be defined as a single body. Within the system, energy is may change forms. There are many different forms of energy.
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