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Physics - Chp 3 - Conservation Laws

CPO Physics First - Newton's 3rd Law, Conservation of Energy & Collisions by Dr. Schumacher
by

Jeanne Schumacher

on 23 April 2015

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Transcript of Physics - Chp 3 - Conservation Laws

Chp 3
Conservation
Laws

3.1 Newton's
Third Law

3.2
Energy
and
Conservation
of Energy
3.3
Collisions

Newton On
a Skateboard

3rd Law of
Motion

Action and
Reaction Forces

Momentum
.

Impulse
.

Law of Momentum
Conservation

3.1
Review

What is Energy
.
What is Work?
.
Potential
Energy
Kinetic
Energy
Conservation
of
Energy
Using
Conservation
of Energy -
Problems
Using and
Conserving
Energy
Everyday
3.2
Review
Elastic and
Inelastic
Collisions
Solving
Impulse
Problems
Car
Crash
Safety
Momentum
Conservation
in Collisions
Forces
in
Collisions
3.3
Review

Impulse and Momentum
http://www1.teachertube.com/viewVideo.php?video_id=154658
Momentum & Collisions
http://www1.teachertube.com/members/viewVideo.php?video_id=18848&title=Momentum
Momentum
http://www1.teachertube.com/members/viewVideo.php?video_id=144715&title=Momentum&vpkey=4badb7d45d
Conservation of Momentum - Circus
http://video.pbs.org/video/1607941500/
quantity that measures the ability to cause change
transfer of energy that results from applying a force over a distance.
HW – Create Graph Stopping Distance vs Speed – See document
What are the units of energy and what do they mean?
What is work in physics and what is the relationship between work and energy?
How can you increase an object’s potential or kinetic energy?
What happens to the kinetic and potential energy of a ball as it falls toward the ground?
Explain what it means to say energy is conserved.
objects bounce off each other with no loss in the total kinetic energy of the system.
total kinetic energy before the collision is the same as the total kinetic energy after the collision
objects change shape or stick together, and the total kinetic energy of the system decreases
energy is not destroyed, but transformed into forms other than KE, (e.g. permanently changing shape).
List three examples of elastic collisions and three examples of inelastic collisions not mentioned in this chapter.
Are momentum and kinetic energy conserved in all collisions?
As long as there are no outside forces (such as friction), momentum is conserved in both elastic and inelastic collisions.
What is the definition of impulse?
Change in momentum or Force x time
Why will an egg break if it is dropped on the ground but not if it is dropped on a pillow?
Pillow gives it extra time to slow down the velocity.
The ground changes velocity to an abrupt stop.
HW Worksheet
Momentum and
Impusle Problems
HW Worksheet
Complete KE PE
Word Problems
HW - Activity
Calculating Stopping
Distance
Go to You tube - "Physics Momentum Video"
www.youtube.com/watch?v=eQ3RfKPPO2o
video doesn't support being embedded
Full transcript