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MONDAY DO NOWTell whether each of the following phase changes absorbs or releases energy:1.Melting2.Freezing3.Sublimation
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• Today’s PLAN• Describe the relationship between kinetic energy
and the mass and speed of an object.• Describe the relationship between potential
energy and the mass and position of an object.
• Todays DO– We will finish discussing changes of matter.– We will compare and contrast kinetic and
potential energy.– We will practice calculating the kinetic and
potential energy of objects.
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Create your own Concept Map with what you know
about the following words:Energy Potential energyKinetic energy MotionForce AccelerationGravity
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Define Energy:• The ability to do work• The ability to cause matter to
move or change
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Kentucky Kingdom Needs You!
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Roller Coaster PhysicsYou are competing for the position of
head Engineer for the newest roller coaster for Kentucky Kingdom.
You will be competing against other designers…so may the best win!
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Tasks for the Competition:
• Take all notes during class• Complete all homework sheets• Grade of C or above on Summative Unit
Test• Design plans for a “Functional” roller
coaster for the competition.
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Energy in Roller Coasters?
• https://www.youtube.com/watch?v=LlM1pIefpBM
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Energy Information:Copy this chart in your notebook.Type of Energy
Definition Examples (2)(draw&label)
Equation
PotentialKinetic
StoredEnergyEnergy of Motion
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What is the Law of Conservation of
Energy?• Energy cannot be created or
destroyed• It can only only be transformed
(changed) from one form to another.
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Roller Coaster Animation
• http://www.pbslearningmedia.org/resource/hew06.sci.phys.maf.rollercoaster/energy-in-a-roller-coaster-ride/
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Which has more potential energy?
✔
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Which has more kinetic energy?
• If these are moving at the same speed…
✔
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KE = ½ mv2
KE = (0.5) x (mass) x (velocity)2
A 10g ball is rolling at 3m/s. The ball has _____ energy. Calculate it.
KE = ½ mv2KE = (0.5) x (10g) x (3m/s)2
KE = 45 J
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PE = mghPE = mass x gravity x
height• A 10g ball is held 2 meters
from the ground. It has _____ energy. Calculate it.
PE = mghPE = 10g x 9.8 m/s2 x 2mPE = 196 J
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Tasks:1st Finish Information Chart
2nd Complete worksheet.-turn in to the side cart
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Exit Slip: