Presentation on theme: "Vocabulary Law of conservation of energy - Energy (E) CANNOT be created or destroyed, only changed in form!!! Energy = property of an object /system that."— Presentation transcript:
1 VocabularyLaw of conservation of energy - Energy (E) CANNOT be created or destroyed, only changed in form!!!Energy = property of an object /system that enables it to do workMechanical energy - due to position or the movement (PE, KE or sum of the two)Chemical energy - atoms, ions, and molecules and bondsElectrical energy - associated with current and voltageThermal energy (heat) - the movement of moleculesLight energy - associated with electromagnetic wavesSound energy - associated longitudinal mechanical waves
2 PS Explain how the law of conservation of energy applies to the transformation of various forms of energy (including mechanical energy, electrical energy, chemical energy, light energy, sound energy, and thermal energy).
3 Law of conservation of energy Energy (E) CANNOT be created or destroyed, only changed in form!!!E can be transformed from one form to another, but the total amount never changes!E in = E out
4 EnergyEnergy = property of an object /system that enables it to do workIf you consider the whole system, total amount of energy never changes
5 Types of EnergyMechanical energy - due to position or the movement (PE, KE or sum of the two)Chemical energy - atoms, ions, and molecules and bondswill change to another form of E during chemical reaction
6 Types of EnergyElectrical energy - associated with current and voltageThermal energy (heat) - the movement of molecules
7 Types of Energy Light energy - associated with electromagnetic waves Sound energy - associated longitudinal mechanical waves
8 KEY CONCEPT!!!!!Different kinds of energy can change from one form to another without changing the total amount of energy!!!!
9 Example: Electric circuit with a battery and a light bulb burning Chemical energy changes to electric energyElectric energy flows through the light bulb and turns electric energy to light and heatEnergy in = energy out
10 Please Explain to ME!!!!!!What type of E transformations occur when a baseball is thrown to another ball player????Player gets ________ from food and changes it to ___________ when throws the ballThe work done on the ball converts the energy of the arm movement to ____________ of the moving ballWhen the second player catches the ball, the ball does work on the player’s hand and glove giving them some _____________The player that catches the ball absorbs the energy of the ball and this energy turns to ____________.The total heat produced is _________ to the energy used to throw the ball.
11 Review!!! What does the law of conservation of energy state? When energy changes from one state to another, what happens to the total amount of energy in the system?What is defined as the property of an object /system that enables it to do work?
12 Determine the type of energy being described!! energy due to position or the movement (PE, KE or sum of the two)energy associated with atoms, ions, and molecules and bondsenergy associated with current and voltageenergy associated with the movement of moleculesenergy associated with electromagnetic wavesenergy associated longitudinal mechanical waves
13 Determine what type of energy transformation is taking place! When you eat foodWhen you hit a baseballWhen you plug in a lightWhen you go for a run and start to sweatWhen a windmill produces the electricity to run a farm
14 VocabularyMechanical energy (ME)- due to position or the movement (PE, KE or sum of the two)Gravitational potential energy (GPE)- Energy of positionKinetic energy (KE)– Energy of motion
15 PS Explain the factors that determine potential and kinetic energy and the transformation of one to the other.
16 Remember - Mechanical energy is due to the position of something or the movement of something. Mechanical energy can be potential, kinetic or the sum of the two.
17 Gravitational Potential Energy (GPE) Energy of positiongreater when the height is greatergreater when the weight of the object is greater
18 Kinetic Energy (KE) energy of motion greater when the speed is greater greater when the mass of the object is greater.
19 Potential energy: energy of position Where does the boulder have the most PE?KE?Where is it even?
20 Describe the energy conversions in this picture: At the top:¼ of the way down:½ way down:¾ downAt the bottom:Is the sum of KE + PE a constant?
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