By the end of this unit, a successful student will be able to:
- Describe the relationships among energy, work, and power both conceptually and quantitatively, (MCAS 2.4) (8.1 – 8.6)
- and use those relationships to solve problems.
- Identify appropriate standard international units of measurement for energy, work, and power. (MCAS 2.6) (8.1, 8.2)
- (MSSF HS-PS3-1) Use algebraic expressions and the principle of energy conservation to calculate the change in energy of one component of a system when the change in energy of the other component(s) of the system, as well as the total energy of the system including any energy entering or leaving the system, is known. (8.1, 8.6)
- (NGSS HS-PS3-2) Develop and use models to illustrate that energy at the macroscopic scale can be accounted for as either motions of particles or energy stored in fields. (8.3 – 8.6)
- (MSSF HS-PS3-1) Identify any transformations from one form of energy to another, including thermal, kinetic, gravitational, magnetic, or electrical energy, in the system. (8.4 – 8.6)
- Interpret and provide examples that illustrate the law of conservation of energy (MCAS 2.1) (8.6)
- Provide examples of how energy can be transformed from kinetic to gravitational potential energy and vice versa. (MCAS 2.2) (8.6)
- Provide examples of how other forms of energy can be transformed from one to another or from one object to another. (8.6)
- Apply quantitatively the law of conservation of mechanical energy to a variety of systems. (MCAS 2.3) (8.6)
All assignments are due on the date listed. That is not the date they are assigned.
Due date Day Assignment
? Day 1 Read: 8.1 – 8.6
Do pp. 119-121: 1-13 (PS 15) (Goals 1-9)
? Day 3 Finish Lab 6: Experiment 16 Energy of a Tossed Ball (Goals 2, 3, 5, 6, 7, 9)
? Day 4 Do problems: (22,23,24,27, 31-34, 42-45) (PS 16) (Goals 1-9)
? Day 5 Do CDPP 8-1 (Goals 1-9)
? Day 6 Finish Rollercoaster Lab (Lab 7) (Goals 2, 3, 5, 6, 7, 9)
? Day 7 Test Ch 8 (Goals 1-9)
Missed a class? Forgot what we did last week? Follow the link to Physics Unit 2 Daily Plans
- Links - Work, Energy and Power
- Textbook links
- Glencoe's support page for Chapter 10
- Glencoe's support page for Chapter 11
- Our text for AP Physics B has support for this material at Pearson Prentice Hall's page for Giancoli's Physics Chapter 6
- Haliday, Resnick and Walker's page on Chapter 7 - Kinetic Energy and Work (Calculus based)
- Haliday, Resnick and Walker's page on Chapter 8 - Potential Energy and Conservation of Energy (Calculus based)
- Eric Ludlum maintains Siege Engine.com - a site centered around a Massachusetts group which designs and opperates catapults, trebuchets, and the like. Perfect for projectile motion, torque, potential energy and other mechanics problems.
- A number of specifications of the power, angular velocities, and torques of automobile, airplane, and boat motors can be found online. One such place is Marine Turbine Technologies' Turbine Outboard Propulsionpage.
- In this mini lecture I talk about the nature of the physics concept of work, its connection to force, distance, and change of energy in a system. I also discusses kinetic energy, and power. Siren: Work, Energy, and Power
- In this mini-lecture I discuss the connection between work and gravitational potential energy. I draw parallels between work and impulse, between change in energy, and change in momentum in open systems and conservation of energy and conservation of momentum in closed systems. This is presented in at an algebraic level. Siren: Work, Potential Energy, and Energy Conservation
- Katie helps demonstrate the relationship between height and speed with a pendulum as a first stage in a demonstration about energy conservation and transformation. Katie and the Pendulum Demo 1.
- Katie further helps demonstrate energy transformation with a pendulum as we notice that with each swing cycle, the gravitational potential energy has dropped at the turning points, thus the pendulum is losing mechanical energy. This can lead to a discussion about how that works with conservation of energy and thermodynamics. Katie and the Pendulum Demo 2
- The Mechanical Universe 13: Conservation of Energy From David Goodstein's 1980s era freshman CalTech physics class, with demos and historical reenactments.
- The Mechanical Universe 14: Potential Energy