Warm Up: Mon, 11/24. Linear Functions Finding Parallel & Perpendicular Lines Using Slope.
Warm-up 3/24/11
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Transcript of Warm-up 3/24/11
WARM-UP 3/24/11
Review: List as many flash card words as you can think of (or if you have to see).
Teach the Teacher: If you could drive any car what car would you want to drive?
Learning Targets: Things that are in Ch. 4 List examples of
different forms of energy
WARM-UP 3/28/11
Review: What is a type of energy (think sun, electrons, and use your notes)
Teach the Teacher: Would you rather eat toe jam or lice?
Learning Targets: PE and KE
DRIVER’S MANUALHANGOUT
Find a safe driving tip for each of the following, (GIVE PAGE NUMBERS!)
Acceleration Speed Newton’s First Law Changing Velocity (in regards to turns)
ENERGYNothing happens without:
ENERGY The ability to cause change The ability to do WORK – Chapter 5 & 6 Energy has many forms
Electrical Chemical Thermal Radiant - Light Nuclear Sound Magnetic Kinetic Potential Mechanical
Money analogy p 101
FORMS OF ENERGY There are many forms of energy.
Electrical energy due to the movement of
electrons Chemical
energy stored in the bonds between atoms
Thermal energy from heat
Radiant - Light energy from the sun & light
Nuclear potential energy stored in the nuclei of
atoms Sound
the energy of vibrating sound waves Magnetic
energy of magnetism Mechanical
Sum of PE & KE
KINETIC ENERGY Kinetic Energy—energy in the form of
motion. Examples—a spinning bicycle wheel, kicking a ball.
The amount of kinetic energy (KE) depends on 2 quantities: The mass of the moving object and its velocity. The more mass, the more kinetic energy.
Example: a truck and a motorcycle are both moving at 100 km/hr. Which one has more KE? Answer: the truck, because it has more mass.
CALCULATING KINETIC ENERGY
KE is energy of motion. KE = ½ mv2
m = mass (kg) v = velocity (m/s)
SI Unit for Energy is Joule Joule = kg m2/s2
POTENTIAL ENERGY
PE is energy that is stored in an object.
Three types of PE1. Elastic PE (ePE) Energy due to a stretch or compression
2. Chemical PE (CPE) Energy in the bonds between atoms
3. Gravitational PE (GPE) Energy due to an elevated position GPE = mgh
m = mass g = gravity 10m/s2 h = height
FLASH CARD
On the Front write:
Kinetic Energy
On the Back write:
Energy in the form of motion
KE = ½ mv2
FLASH CARD
On the Front write:
Potential energy
On the Back write:
Energy that is stored Elastic Chemical Gravitational
FLASH CARD
On the Front write:
Gravitational PE (GPE)
On the Back write:
Energy due to an elevated position
GPE = mgh
PHYSICS TO WIN IT CHALLENGE! Penny Pusher See how much elastic PE is stored up when
a rubber band is pulled back to different lengths.
On 3x5 card: 1. Give the mass of the penny. 2. Pull back the rubber band 1 cm and
release. How far did it go? 3. Pull back the rubber band 3 cm and
release. How far did it go? 4. How far do you have to pull back to get
the penny to go off the table?
WARM UP 3/30/11
Review: Make sure you have and know these two flash card words: Kinetic Energy and Potential Energy
Teach the Teacher: What do you think of block classes?
Learning Targets: PE and KE energy
KINETIC OR POTENTIAL
KINETIC OR POTENTIAL
KINETIC OR POTENTIAL?
KINETIC OR POTENTIAL
KINETIC OR POTENTIAL?
KINETIC OR POTENTIAL
KINETIC OR POTENTIAL
KINETIC OR POTENTIAL
KINETIC OR POTENTIAL
NOTES TO A NOTECARD
1. Find where it talks about Potential energy. What are the three kinds of potential energy?
2. What is elastic potential energy? 3. What are the two things kinetic
energy depends on? 4. Finish this sentence: The more mass
an object has the more _____________.
NUCLEAR ENERGY
There are two types of nuclear energy Fission and Fusion For both forms energy is stored as
mass in the atoms of certain elements. This mass can be changed into energy under the proper conditions according to Albert Einstein's famous equation:
nuclear fission nuclear fusion
FUSION & FISSION Fusion atoms are
"fused" together In fusion lighter
elements form heavier elements
Uses The middle of stars
Fission the 2nd form of nuclear energy
The exact opposite of fusion. In fission atoms are broken
apart. In fission heavier elements
form lighter elements. Uses
Hydrogen Bomb Nuclear Energy Plants
LAW OF CONSERVATION OF ENERGY
Energy can not be created nor destroyed, it just changes form.
Mechanical Energy = KE + PE Rollercoaster mass and spring
LAW OF CONSERVATION OF ENERGY CONTINUED
Your body follows the law of conservation of energy. Ex. Chemical potential
energy is stored in the food you eat.
Ex. Your body stores energy in fat and other chemicals.
Ex. Your body converts the energy to make you move.
SWINGING On a swing or a pendulum the
mechanical energy is also constant. To get moving, you need KE. As you
rise higher, your GPE increases. As you move down, your KE increases. Mechanical Energy is constant.