ENERGY

TABLE OF CONTENTS

• 3-9 mechanical energy
• 10-16 potential energy
• 17-23 kenetic energy
• 24-30 work energy
• 31-37 power energy

TABLE OF CONTENTS

• 38-43 conservation of energy
• 43-38 non-mecanical energy

MECHANICAL ENERGY

WHAT IS IT?

• Mechanical energy is the combined energy used to move something.
• It is measured in Joules.
• An energy that applies 1N of force on an object to move it 1M.

BATTERIES THAT CHARGE THEMSELVES.

• http://cleantechnica.com/2011/08/31/batteries-that-charge-themselves-with-m...

MECHANICAL ENERGY VEDIO

• http://www.teachertube.com/viewVideo.php?video_id=112533

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MATH

• A rock has a pe of 12 and a ke of 13. Whats its me?
• A snow ball has a PE of 3 and a KE of 12. What is its ME?
• Luna has a PE of 180 and a KE of 200. What is her ME?
• Jason has a ME of 180 and a PE of 20. What is his KE?
• Sarah has a kE of 20 and a ME of 30. Whats her PE?

KEY

• ME=25J
• ME=15J
• ME=380J
• KE=160J
• PE=10J

POTENTIAL ENEGY

WHAT IS POTENTIAL ENERGY?

• Stored energy due to position.
• There are two types of potential energys.
• Gravitational energy- energy due to position gravity id pulling on you
• Elastic energy- energy die to stretching of eleastic objects, or springs.

VEDIO OF POTENTIAL ENERGY

• http://www.brightstorm.com/science/physics/energy-and-momentum/potential-en...

ARTICAL OF POTENTIAL ENERGY

• http://www.sciencedaily.com/articles/p/potential_energy.htm

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MATH

• Mrs.F's book has 5 joules of potential energy. It is 1kg. How high up is the book?
• A 4kg rock is sitting on a 3m ledge. How much PE does it have?
• A ball has 294J of PE and is 10m high. What is the balls mass?
• If an object has a mass of 23kg, and a hight of 5m. What is the PE of the object?
• A ball has 270.48 of PE it is 2.3kg. How high is the ball?

KEY

• H=.51
• PE=117.6J
• M=3kg
• J=1127
• H=12m

KENETIC ENERGY

WHAT IS IT?

• Kenetic Energy has three types. Vibrational,
• Rotational, and Translational. Its movement of any kind.
• Livening things, even when still, have KE, their cells, blood, heart
• Are constently moving

ARTICAL OF KINETIC ENERGY

• http://www.britannica.com/EBchecked/topic/318130/kinetic-energy

VIDEO OF KINETIC ENERGY

• http://www.brightstorm.com/science/physics/energy-and-momentum/kinetic-ener...

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MATH

• Mrs. F has 2000J of KE. Her mass is 65kg. How fast is she moving?
• A book has 30J of KE. Its velocity is 8 m/s. Whats is the books mass?
• A car is going 100 m/s, ans weighs 1,000 kg. How mush jouls does it have?
• Ebeline has 20j of KE. Her velocity is 10 m/s. Whats her mass?
• A boat has 60000j of KE.its mass is 20000 kg. How fast is it moving?

KEY

• V=7.8 m/s
• M=2.74 kg
• J=5000
• J=.4
• V=2.45 m/s

WORK

WHAT IS IT?

• A force is that causes displacement, moves something
• Over a distance, has to cause displacement to ne work.

ARTICLE OF WORK

• http://www.britannica.com/EBchecked/topic/84406/bulldozer

VEDIO OF WORK

• http://www.sciencechannel.com/video-topics/engineering-construction

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MATH

• Mrs. F has 3000J of KE. She pushes a chair w/ 10N of force. How far did it go? How much work did she do?
• Sarah has 10J of KE. She throws a chair at Daniel w/ 20N of force. How far did it go? how much work?
• Bob moved a desk 3.5m, with a force of 4J. How much work did he do?
• Jack used 20N of force to move a chair 12M. How much work did he do?
• Mike has 10j of KE and moves a desk 20m. How much force does he use?

KEY

• 3000=10M 300=M
• M=.5 10=20M
• 14=4*3.5
• J=240
• 10J=m20 N=.5

POWER

WHAT IS IT?

• How fast work is done.
• "Horsepower"
• Measured in watts.
• Faster= more power Slower= less power

ARTICAL OF POWER

• http://greatergood.berkeley.edu/article/item/power_paradox

VIDEO OF POWER

• http://www.brightstorm.com/science/physics/energy-and-momentum/power/

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MATH

• Mr.s f has done 10J of work in 2 seconds. how much power did she have?
• Bob uses 30 watts and did 15J of work. How long did it take?
• It took Jenny 15 seconds to move a desk with 45J. How much power did she have?
• Fred uses 100J in 10 seconds. How much power did he have?
• Paco, the mexican viking, used 11 watts in 25 seconds to move his ship. How much work did he do?

KEY

• W=5
• S=.5
• W=3
• W=10
• J=275

CONSERVATION OF ENERGY

WHAT IS IT?

• Energy can't be created or destroyed,
• It can only be transformed.
• Only the sun can creat energy.

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ARTICAL OF CONSERVATION OF ENERGY

• http://geography.howstuffworks.com/terms-and-associations/waterfall.htm

VIDEO OF CONSERVATION OF ENERGY

• http://www.billiards.colostate.edu/high_speed_videos/HSV3-1.htm

NON-MECANICAL

WHAT IS IT?

• Chemical energy- reliced when atoms split apart
• Heat energy- when any object rubs aginst another ex: blisters form from it
• Sound- KE-> vibrations ex: drum being hit by drum sticks
• Electrical- electrons carry energy on a circuit. Light- nuclear fustion-> creats tons of E
• Nuclear energy- fustion (atoms come together) & fission (atoms come apart)

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ARTICAL OF NON MACANICAL ENERGY

• http://science.howstuffworks.com/sound-info.htm

VIDEO OF NON MECANICAL ENERGY

• http://science.howstuffworks.com/chemical-reaction-videos-playlist.htm