Download Forms of Energy

Forms of Energy
Talk to your group and make
a list of all the types of
energy that you can think of.
Eight Basic Forms of Energy
•
•
•
•
Mechanical (Kinetic & Potential)
Thermal/heat
Light
Sound
The units for energy are
Joules (J) or Calories.
•
•
•
•
Chemical
Nuclear
Magnetic
Electrical
Mechanical Energy
Energy of motion and position
• Kinetic – energy of motion
• Potential – energy of position
– potential to move
Mechanical Energy
Mechanical Energy
Gravitational Potential Energy Ug
Ug = mgy
m = mass (in kilograms)
g = acceleration due to gravity (9.8 m/s2)
y = height
Taylor has a mass of 75kg and climbs up on a desk 1 m
off the floor. What is his gravitational potential
energy with respect to the floor?
Thermal Energy
• Energy associated
with temperature.
• All objects have
thermal energy if
they are not at
absolute zero.
• An object has more
thermal energy at a
high temperature
than it does at a
low temperature.
Electromagnetic waves – Light Energy
Here’s another representation of Electromagnetic waves. This one shows you
examples of the size of the different waves and at what temperature an object must
be to emit these waves.
Sound Energy
• Recall that a sound wave carries energy
• A wave is really energy in motion
Chemical Energy
• Energy released (or absorbed)
when elements are rearranged into
new compounds.
• Energy released (or absorbed) in a
chemical process.
Nuclear Energy
• Energy released (or absorbed) when elements
change into new elements.
The worlds first
atomic bomb test in
New Mexico on July
16, 1945
Magnetic Energy
• Energy
can be
stored in a
magnetic
field.
Electrical Energy
• Energy of
moving
electrons.
What form is it?
Flowing water?
A.
B.
C.
D.
E.
It is Chemical energy
It is Mechanical energy
It is Thermal energy
It has/carries Mechanical energy
It has/carries Chemical energy
What form is it?
A Battery contains?
A.
B.
C.
D.
E.
Chemical energy
Electrical energy
Thermal energy
Potential energy
Light energy
What form is it?
Wood?
A.
B.
C.
D.
E.
It is Chemical energy
It is Thermal energy
It is Potential energy
It has/contains Chemical energy
It has/contains Thermal energy
What form is it?
What form of energy does a banana have?
A.
B.
C.
D.
E.
Chemical
Mechanical
Sound
Light
Magnetic
What form is it?
What form of energy do the lights in this room
give off?
A.
B.
C.
D.
E.
Chemical
Nuclear
Light
Heat
Electrical
What form is it?
What form of energy does the projector in this
room give off?
A.
B.
C.
D.
E.
Thermal
Light
Sound
A and B
A, B and C
Conservation of Energy
• Energy can never be created or destroyed. It
can only change forms.
Kinetic and Potential Energy
1. If the skater starts at rest at this point, what
kind of energy does he have?
A. Electrical
B. Kinetic
C. Potential
D.None
2. As he skates across the bottom?
A. Electrical
B. Kinetic
C. Gravitational Potential
D.None
Energy Form
If the skater is released from rest at the
point shown, what kind of energy does
he have at his highest point as shown?
Friction is off.
A. Kinetic
B. Potential
C. Thermal
D.Kinetic and
Potential
E. None
Energy Form
At the second blue dot, what kind of
energy does he have?
A. Kinetic
B. Potential
C. Thermal
D.Kinetic and
Potential
E. He won’t get
there.
Energy Form
At the third blue dot, what kind of
energy does he have?
A. Kinetic
B. Potential
C. Thermal
D.Kinetic and
Potential
E. He won’t get
there.
Energy Form
At the fourth blue dot, what kind of
energy does he have?
A. Kinetic
B. Potential
C. Thermal
D.Kinetic and
Potential
E. He won’t get
there.
Energy Form
At the fifth blue dot, what kind of
energy does he have?
A. Kinetic
B. Potential
C. Thermal
D.Kinetic and
Potential
E. He won’t get
there.
Watch the pie chart to see how energy exchanges
between potential and kinetic.
Which has more potential energy?
A
A. box A
B. box B
C. Equal
B
What kind of energy will I give box
B if I put it on the chair?
A
A. Electrical
B. Kinetic
C. Potential
D.Both
E. None
B
What about while I’m moving it?
What kind of energy does it have?
A
B
A. Electrical
B. Kinetic
C. Potential
D.Both potential and kinetic
E. None
Let’s say I toss it up to the chair.
What kind of energy does it have at
point a?
B
• b
A
• c
•a
A. Electrical
B. Kinetic
C. Potential
D.None
Let’s say I toss it up to the chair.
What kind of energy does it have at
point b?
B
• b
A
• c
•a
A. Electrical
B. Kinetic
C. Potential
D.None
Let’s say I toss it up to the chair.
What kind of energy does it have at
point c?
B
• b
A
• c
•a
A. Electrical
B. Kinetic
C. Potential
D.None
Energy Flow Worksheet
Energy
Flow