Download Oct 24 1. What two Factors determine how much potential energy an

Oct 24
1. What two Factors determine how much potential energy an
object has?
2. Which of the following has the most kinetic energy?
sunny windowsill A bicycle parked at the top of a hill
A fallen leaf laying on the ground A ball rolling across the floor
3. The energy stored in the nucleus of an atom is what form of
energy?
4. What two factors determine an objects's kinetic energy?
5. Which form of energy is transmitted by vibrations of air?
6. When energy is converted from one form to another, what is
usually produced?
Chemical energy gravity heat nuclear energy
Use this link for the work sheet or go to middle school, school staff,
my name, and link
http://www.classzone.com/books/ml_science_share/vis_sim/
mem05_pg69_potential/mem05_pg69_potential.html
Potential and Kinetic energy classzone
Explore: How can a can of paint have energy and how that energy can
be converted.
1) Shade in the potential energy graph the painter has with the small blue
can of paint in picture 1.
.
Picture 1
Picture 2
2) Shade in the potential energy graph the painter has with the big red can
of paint in picture 2.
3) Shade in the potential energy graph the painter has with the small blue
can of paint in picture.3. On the ladder.
Picture 3
Picture 4
4) Shade in the potential energy graph the painter has with the big red can
of paint in picture 4, on the ladder.
5) List two ways we changed the potential energy?
6) When the painter drops the cans what happens to the potential energy
graph?
7) When the painter drops the cans what happens to the kinetic energy?
8) How do the changes in question 5 affect the kinetic energy?
Forms of Energy
Need to Learn
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How can you determine an object’s mechanical energy?
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What are the two basic kinds of energy?
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How are energy, work, and power related
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What are some forms of energy associated with the particles that
make up objects?
There are many different forms of energy. Mechanical energy is the energy
associated with the motion or position of an object. Mechanical energy can
be kinetic or potential energy. You can find an object’s mechanical energy
by adding the object’s kinetic and potential energy.
Mechanical energy = Potential energy + kinetic energy
Work is done when a force moves an object through a distance. The ability
to do work or cause change is called energy. Energy is measured in a unit
called joules.
When an object or organism does work on an object, some of its energy is
transferred to that object. If the transfer of energy is work, then power is
the rate at which energy is transferred, or the amount of energy transferred
in a unit of time.
Power = Energy transferred
Time
Two basic kinds of energy are kinetic and potential energy. The
energy of motion is called Kinetic energy. The more work you do on an
object, the more energy you give that object. The more mass a moving
object has, the more kinetic energy it has. Kinetic energy also increases
when velocity increases.
Kinetic energy= ½ x Mass x velocity2
( Continued on the Next page)
Energy that is stored and held inn readiness is called potential energy.
When you raise a book you give the object potential energy.
Potential energy that depends on height is gravitational potential energy.
Gravitational potential energy = weight x Height
When you stretch an object, you give it a different kind of potential
energy. The potential energy associated with objects that can be stretched
or compressed is called elastic potential energy
Forms of energy associated with the particles of objects include thermal
energy, electrical energy, chemical energy, electromagnetic energy, and
nuclear energy.
Thermal energy is the total potential and kinetic energy of particles in
an object. When the thermal energy of an object increases, the object
becomes warmer.
Chemical energy is stored in chemical compounds. Chemical energy is
potential energy stored in chemical bonds that hold chemical compounds
together.
Moving electrical charges produce electricity, and the energy they carry
is called electrical energy. Nuclear energy is potential energy stored in
the nucleus of an atom. Electromagnetic energy, such as light, travels in
waves that have some electrical properties and some magnetic properties.
Because waves move, they have kinetic energy.
1. What two forms of energy are associated with mechanical
energy?
2. How would you calculate an object’s mechanical energy?
3. If thermal energy is increased, what happens to the movement of
particles?
4. What kind of energy is stored in the bonds in compounds of the
food you eat?
5. What kind of energy is stored in the nucleus of an atom?
6. Riding a bicycle would be what form of energy?
7. What kind of energy is released from the flow of charged
particles?
8. The ability to do work or cause change is called__________
9. Why can work be thought of as a transfer of energy?
10. What are the two basic kinds of energy?
11. How are work and energy related?
12. The kinetic energy of an object depends on its _______
And its ________
13. What is the relationship between velocity and kinetic energy?
14. What formula do you use to calculate Kinetic energy?
15. What formula do you use to calculate the gravitational potential energy
of an object?
16. What is potential energy called that depends on height?
17. What is potential energy called that is associated with objects
that can be stretched?
Vocabulary write the word
____________ 18
energy that depends on height
____________19
ability to do work or cause change
____________20
__________21
____________22
energy associated with objects that
Can be stretched or compressed
an object’s energy due to its motion
any type of stored energy