Download UP6.LP1.PotentialandKineticEnergy

February 8th and 9th
Unit 6: Energy Transformations
Objective(s):
1.
Knowledgeable
2.
MATERIALS NEEDED:
1. Pencil
2. Unit 6, Day 1 Packet
3. Agenda
SWBAT differentiate between potential
and kinetic energy.
SWBAT identify where the greatest/least
potential and kinetic energy occurs on a
diagram.
Relevance:
Understanding potential and kinetic
energy and how it is present in our
daily lives adds more understanding
to the way our world works.
Do Now:
Page 221 in textbook
Paige Keely Science Probe
5 min
Paige Keely Science Probe
Answer/Discussion
The best answer is….
Alan
The ball has energy when it is moving
and not moving. Objects can have
energy when they are moving, such as
the moving soccer ball. They also can
have energy when they are not moving.
The big idea is that energy is the ability
to change an object in some way.
5 min
BrainPop Video
Questions:
1. Potential
_________ energy is stored
energy that an object has
because of its position or
condition.
Kinetic energy is the
2. _________
energy an object has
because of its motion.
moving objects
3. Only __________
have kinetic energy.
4. The more __________
mass an
object has, the more
potential energy it has.
http://www.brainpop.com/science/energy/potenti
alenergy/
Energy
• Energy is a property of matter, and all matter has it.
• Energy is the ability to do work.
Light Energy
Electrical Energy
Nuclear Energy
Sound Energy
Thermal Energy
Mechanical Energy
The Law of Conservation of Energy
Energy cannot be created or destroyed.
It is only transferred.
Mechanical Energy
• Today we’re going to focus on two kinds of
mechanical energy – potential and kinetic.
Potential Energy
Kinetic Energy
Potential Energy
Energy that is stored in a system, (i.e.
not moving).
Affected by the height and mass of the
object.
Potential Energy
Any object that is at rest or has the
potential to move.
Any object that is in motion. (i.e. any
object that has kinetic energy.)
Gravitational Potential Energy
• Gravitational
potential energy is
the stored energy
given to an object
that has been lifted
into the air against
the force of gravity
Can you think of other examples?
Potential Energy
Turn and Talk
What two things determine the amount of
potential energy an object has?
Kinetic Energy
The energy in a moving object.
Affected by the mass and speed of the
object.
Kinetic Energy
Any object that is in motion.
Any object that is at rest, not moving.
(i.e. any object that has potential
energy.
Energy Transfers
• Energy cannot be created or destroyed. (Law of
Conservation of Energy)
• Objects always have potential or kinetic energy,
or both!
• They can be transferred from one to the other.
Energy Transfers
• Think about a book falling off a shelf.
The books on the
shelf have potential
energy.
As the books fall, the
potential energy
transfers to kinetic
energy.
The books on the
ground have
potential energy
again.
Energy Transfers
Paint can example
http://www.classzone.com/books/ml_science_share/vis_sim/mem05
_pg69_potential/mem05_pg69_potential.html
Pendulum Swinging
• How can a pendulum swinging be an example of
potential/kinetic energy transfer?
POTENTIAL ENERGY
POTENTIAL ENERGY
KINETIC ENERGY
Match ‘em Up!
30 sec!
A. Potential Energy
B. Kinetic Energy
C. The Law of
Conservation of
energy
1. The energy in a
moving object.
2. Energy cannot be
created or destroyed.
3. The stored energy in
an object at rest.
Stop and Jot
How are potential and kinetic energy different?
Watch out!
• Energy is not just in living
things – energy is in
everything!
• Energy is present even if
an object is not moving.
• There is a fixed amount of
energy taking place at a
time – it is transferred.
• Objects can have both
potential and kinetic
energy at the same time.
Word Scramble
Challenge!
YERENG
ENERGY
Definition: The ability to do work. {examples: mechanical,
potential, chemical, kinetic, etc.}
30 sec!
Turn and Talk
What is the law of conservation of energy?
Greatest/Least Potential and Kinetic Energy
• The amount of potential energy an object has depends on its mass
and height.
• The higher an object is, the more potential energy it has.
• Similarly, if we have two objects at the same height, the one with
more mass will have more potential energy than the one with less
mass.
Greatest/Least
Potential and Kinetic Energy
• The amount of kinetic energy an object has depends on its mass
and speed.
Think-Pair-Share
What two things determine the amount of
kinetic energy?
Energy Skate Park
https://phet.colorado.edu/en/simulation/energy-skate-park
Greatest/Least
Potential and Kinetic Energy
http://www.pbslearningmedia.org/asset/mck05_int_rollercoaster/?utm_source=teachersdomain_redirect/asset/mck05
_int_rollercoaster/utm_medium=teachersdomain/asset/mck05_int_rollercoaster/utm_campaign=td_redirects
Greatest/Least
Potential and Kinetic Energy
• Let’s fill in the diagram on your guided notes.
Greatest potential energy
• Mass and height
Greatest kinetic energy
• Speed and mass
Think-Pair-Share
How does the law of conservation of energy
apply to potential and kinetic energy?
Guided Practice
1.
2.
3.
4.
5.
6.
7.
8.
9.
What type of energy is present in the ball as it is
being held before it drops?
What happens to the potential and kinetic energy as
the ball is dropped?
What type of energy is present in the ball as it hits
the floor?
What happens to the total mechanical energy at all
points during the trial?
At what point did the ball have the greatest kinetic
energy?
In which trial did the ball have the greatest potential
energy? Why?
In which trial did the ball have the greatest kinetic
energy as it hit the floor? How do you know?
In which trial did the ball bounce highest after it hit
the ground? Why do you think that happened?
For Trials 1 and 2, compare the potential energy at a
height of 1 meter.
17 min
20 min
Independent Practice
• Complete the independent
practice about potential and
kinetic energy
• During this time you should be
working silently and
independently.
• If you have a question, please
raise your hand silently at your
seat.
Exit Ticket
Complete the exit ticket.
Turn in as you leave.
You may pack up your things.
STOP Cards
S
T
O
P
Summarize: Summarize the day’s
lesson and what we learned.
Trait: What IB trait relates to the
lesson?
Objective: Re-state in your own
words and say whether or not we
met that objective for the day.
Purpose: What was the purpose of
this lesson?