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Physics 200 2015-2016
Chapter 7 – Work and Energy
Class #
Date
59
11-30-15
B
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12-02-15
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Topics & Activities
7.1. Work: The Scientific Definition
 Explain how an object must be
displaced for a force on it to do work.
 Explain how relative directions of
force and displacement determine
whether the work done is positive,
negative, or zero.
 Calculate the work done by a force on
an object given the force and
displacement.
Notes – Intro to Work and Energy
7.2. Kinetic Energy and the Work-Energy
Theorem
 Explain work as a transfer of energy
and net work as the work done by the
net force.
 Explain and apply the work-energy
theorem.
Horsepower Activity
Bill Nye - Energy
7.3. Gravitational Potential Energy
 Explain gravitational potential energy
in terms of work done against gravity.
 Show that the gravitational potential
energy of an object of mass m at
height h on Earth is given by PEg =
mgh .
 Show how the work-energy theorem
explains the conversion between
gravitational potential energy and
kinetic energy for an object moving
under the influence of gravity.
 Show how knowledge of the potential
energy as a function of position can
be used to simplify calculations and
explain physical phenomena.
Intro – Energy Transformation in a Pendulum
7.4. Conservative Forces and Potential
Energy
 Define conservative force, potential
energy, and mechanical energy.
 Explain the potential energy of a
Assignment Due
 R&N - 7.1. Work: The
Scientific Definition
 R&N - 7.2. Kinetic
Energy and the
Work-Energy
Theorem
 R&N - 7.3.
Gravitational
Potential Energy
 R&N - 7.4.
Conservative Forces
and Potential Energy
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spring in terms of its compression
when Hooke’s law applies.
 Apply conservation of mechanical
energy to solve mechanics problems in
terms of potential energies instead of
forces.
Brief Spring Recap
Lab - Energy of a Swinging Pendulum
7.5. Nonconservative Forces
 Define nonconservative forces and
explain how they affect mechanical
energy.
 Show how the principle of
conservation of energy can be applied
by treating the conservative forces in
terms of their potential energies and
any nonconservative forces in terms
of the work they do.
Heat Loss Due to Friction – Q = Ffd = FNd
7.6. Conservation of Energy
 Explain the law of the conservation of
energy.
 Express conservation of energy in
equation form.
 Describe some of the many forms of
energy.
 Examine commonly encountered
examples of transformations between
forms of energy.
Activity - Elastic Potential Energy
 R&N - 7.5.
Nonconservative
Forces
 R&N - 7.6.
Conservation of
Energy
Conservation of Energy Practice
Conservation of Energy Practice
7.7. Power
 Define power as the rate of doing
work and identify typical examples of
power.
 Calculate power by calculating
changes in energy over time.
 Examine power consumption and
calculations of the cost of energy
consumed.
Chapter 7 Wrap Up
NOVA: The Big Energy Gamble
 R&N - 7.7. Power
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12-15-15
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12-16-15
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12-21-15
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12-22-15
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Wrap up
Wrap up
Chapter 7 Test Review
Chapter 7 Test
Excel Roller Coaster Spreadsheet
Solar Energy – Saved By The Sun Nova video
LN2 Fun