MONDAY DO NOW Tell whether each of the following phase changes absorbs or releases energy: 1.Melting 2.Freezing 3.Sublimation.

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Presentation transcript:

MONDAY DO NOW Tell whether each of the following phase changes absorbs or releases energy: 1.Melting 2.Freezing 3.Sublimation

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.

Create your own Concept Map with what you know about the following words: EnergyPotential energy Kinetic energyMotion ForceAcceleration Gravity

Define Energy: The ability to do work The ability to cause matter to move or change

Kentucky Kingdom Needs You!

Roller Coaster Physics You 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!

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.

Energy in Roller Coasters? M1pIefpBMhttps:// M1pIefpBM

Energy Information: Copy this chart in your notebook. Type of Energy DefinitionExamples (2) (draw&label) Equation Potential Kinetic Stored Energy of Motion

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.

Roller Coaster Animation ource/hew06.sci.phys.maf.rollercoast er/energy-in-a-roller-coaster-ride/ ource/hew06.sci.phys.maf.rollercoast er/energy-in-a-roller-coaster-ride/

Which has more potential energy? ✔

Which has more kinetic energy? If these are moving at the same speed… ✔

KE = ½ mv 2 KE = (0.5) x (mass) x (velocity) 2 A 10g ball is rolling at 3m/s. The ball has _____ energy. Calculate it. KE = ½ mv2 KE = (0.5) x (10g) x (3m/s) 2 KE = 45 J

PE = mgh PE = mass x gravity x height A 10g ball is held 2 meters from the ground. It has _____ energy. Calculate it. PE = mgh PE = 10g x 9.8 m/s 2 x 2m PE = 196 J

Tasks: 1 st Finish Information Chart 2 nd Complete worksheet. -turn in to the side cart

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