SlideShare a Scribd company logo
1 of 13
Work &
ENERGY
Energy
• The ability to do work
Work
• Using energy to exert a force to
move an object
Work = Energy
&
Energy = Work
• The work done is equal to the energy
used to do the work.
Calculating Work:
W = 0, if F = 0
W = F d
W = 0, if d = 0
No work done if object
doesn’t move.
No work done, whenever
there is no force.
Unit: Joule (J) is a Nm
A person pushes with a 110 N force
for a distance of 30 m. How much
work was done?
Examples:
W = F d
W = ( 110 N ) ( 30 m )
W = 3300 N m
or
W = 3300 J 1 Joule (J) = 1 N m
Potential and
Kinetic Energy
Kinetic Energy:
Energy in Motion
Calculating KE:
KE = ½ m v2
KE = 72 J
Example:
What is the KE of 100 kg of
water moving at 1.2 m/sec?
KE = 72 ( kg m )/s
22
KE = mv
2
2
1
KE = ( 100 kg ) ( 1.2 m/s )
2
2
1
KE = ( 100 kg ) ( 1.44 m /s )
22
2
1
KE = mvKinetic Energy Fact:
2
2
1
The kinetic energy increases dramatically with increasing speed.
35 mi/hr
4 x speed
16 x energy
140 mi/hr70 mi/hr
2 x speed
4 x energy
What is Potential Energy?
oEnergy that is stored
and waiting to be
used later
What is Potential Energy?
o Potential energy is
stored energy
o P.E. = mass x gravity x height
o P.E. = mghDon’t look down,
Rover!
Good boy!
Law of Conservation of Energy
• Energy cannot be created or destroyed
• Energy can be transferred from one type or
state to another
Work and energy

More Related Content

What's hot

Work Energy and Power
Work Energy and PowerWork Energy and Power
Work Energy and PowerAXIOM BPM
 
Work energy theorem summary 7 may 2015
Work energy theorem summary 7 may 2015Work energy theorem summary 7 may 2015
Work energy theorem summary 7 may 2015Mphiriseni Khwanda
 
Work, power and energy
Work, power and energyWork, power and energy
Work, power and energyitutor
 
Work - Science lesson
Work - Science lessonWork - Science lesson
Work - Science lessonMel Gibb
 
Work force energy ppt final wiki
Work force energy ppt final wikiWork force energy ppt final wiki
Work force energy ppt final wikimike_mcmahon
 
Work, energy, and power
Work, energy, and powerWork, energy, and power
Work, energy, and powerAbhay Goyal
 
Work energy theorem ppt
Work  energy theorem pptWork  energy theorem ppt
Work energy theorem pptAlvinaGohar1
 
Work Done and Energy Transfer
Work Done and Energy TransferWork Done and Energy Transfer
Work Done and Energy TransferDaniel McClelland
 
O level work energy and power
O level work energy and powerO level work energy and power
O level work energy and powerChen Gong
 
Ppt on work energy and power class xi science
Ppt on work energy and power class xi sciencePpt on work energy and power class xi science
Ppt on work energy and power class xi scienceacceleration gravity
 
17 energy mechanical fluid
17 energy mechanical fluid17 energy mechanical fluid
17 energy mechanical fluidmrmbasso
 

What's hot (19)

Engineering science (2)
Engineering science (2)Engineering science (2)
Engineering science (2)
 
Work Energy and Power
Work Energy and PowerWork Energy and Power
Work Energy and Power
 
Work energy theorem summary 7 may 2015
Work energy theorem summary 7 may 2015Work energy theorem summary 7 may 2015
Work energy theorem summary 7 may 2015
 
Chapter 6 Work And Energy
Chapter 6 Work And EnergyChapter 6 Work And Energy
Chapter 6 Work And Energy
 
Work, power and energy
Work, power and energyWork, power and energy
Work, power and energy
 
Mechanical energy
Mechanical energyMechanical energy
Mechanical energy
 
Work - Science lesson
Work - Science lessonWork - Science lesson
Work - Science lesson
 
Work force energy ppt final wiki
Work force energy ppt final wikiWork force energy ppt final wiki
Work force energy ppt final wiki
 
Work, energy and power
Work, energy and powerWork, energy and power
Work, energy and power
 
Work,Energy and Power
Work,Energy and PowerWork,Energy and Power
Work,Energy and Power
 
Work & Energy
Work & EnergyWork & Energy
Work & Energy
 
Work, energy, and power
Work, energy, and powerWork, energy, and power
Work, energy, and power
 
Work energy theorem ppt
Work  energy theorem pptWork  energy theorem ppt
Work energy theorem ppt
 
Power
PowerPower
Power
 
Work Done and Energy Transfer
Work Done and Energy TransferWork Done and Energy Transfer
Work Done and Energy Transfer
 
O level work energy and power
O level work energy and powerO level work energy and power
O level work energy and power
 
Ppt on work energy and power class xi science
Ppt on work energy and power class xi sciencePpt on work energy and power class xi science
Ppt on work energy and power class xi science
 
Work and Energy
Work and EnergyWork and Energy
Work and Energy
 
17 energy mechanical fluid
17 energy mechanical fluid17 energy mechanical fluid
17 energy mechanical fluid
 

Viewers also liked

Forces and Laws of Motion class 9
Forces and Laws of Motion class 9Forces and Laws of Motion class 9
Forces and Laws of Motion class 9Sanaa Sial
 
Work,power and energy
Work,power and energyWork,power and energy
Work,power and energySheikh Amman
 
(NSCO13) Work, Force, Energy
(NSCO13) Work, Force, Energy(NSCO13) Work, Force, Energy
(NSCO13) Work, Force, EnergyCzarina Nedamo
 
Lecture17 energy
Lecture17 energyLecture17 energy
Lecture17 energyAlex Klein
 
Work, force, and energy
Work, force, and energyWork, force, and energy
Work, force, and energyjoverba
 
AP Physics - Chapter 6 Powerpoint
AP Physics - Chapter 6 PowerpointAP Physics - Chapter 6 Powerpoint
AP Physics - Chapter 6 PowerpointMrreynon
 

Viewers also liked (7)

Force work power
Force work powerForce work power
Force work power
 
Forces and Laws of Motion class 9
Forces and Laws of Motion class 9Forces and Laws of Motion class 9
Forces and Laws of Motion class 9
 
Work,power and energy
Work,power and energyWork,power and energy
Work,power and energy
 
(NSCO13) Work, Force, Energy
(NSCO13) Work, Force, Energy(NSCO13) Work, Force, Energy
(NSCO13) Work, Force, Energy
 
Lecture17 energy
Lecture17 energyLecture17 energy
Lecture17 energy
 
Work, force, and energy
Work, force, and energyWork, force, and energy
Work, force, and energy
 
AP Physics - Chapter 6 Powerpoint
AP Physics - Chapter 6 PowerpointAP Physics - Chapter 6 Powerpoint
AP Physics - Chapter 6 Powerpoint
 

Similar to Work and energy

work power and energy.pptx
work power and energy.pptxwork power and energy.pptx
work power and energy.pptxPrincessRegunton
 
Unit 1 module 2 work and energy
Unit 1 module 2 work and energyUnit 1 module 2 work and energy
Unit 1 module 2 work and energyRaymond Manalastas
 
WORK POWER AND ENERGY
WORK POWER AND ENERGYWORK POWER AND ENERGY
WORK POWER AND ENERGYBernard Cid
 
Physics Presentation
Physics PresentationPhysics Presentation
Physics PresentationZargham Shafi
 
Work Power and Energy
Work Power and EnergyWork Power and Energy
Work Power and EnergyZargham Shafi
 
Work and energy
Work and energyWork and energy
Work and energyPratiksha
 
lec4workpowerenergy-150127073027-conversion-gate01.pptx
lec4workpowerenergy-150127073027-conversion-gate01.pptxlec4workpowerenergy-150127073027-conversion-gate01.pptx
lec4workpowerenergy-150127073027-conversion-gate01.pptxPrincessRegunton
 
11workandenergy-150809064825-lva1-app6891.pdf
11workandenergy-150809064825-lva1-app6891.pdf11workandenergy-150809064825-lva1-app6891.pdf
11workandenergy-150809064825-lva1-app6891.pdfSABAKHAN478855
 
Work and power class
Work and power classWork and power class
Work and power classbassantnour
 
class 9 chapter 11 work and energy very helpful presentation
class 9 chapter 11 work and energy very helpful presentationclass 9 chapter 11 work and energy very helpful presentation
class 9 chapter 11 work and energy very helpful presentationStainich Shivansh
 
Work and Energy in Physics
Work and Energy in PhysicsWork and Energy in Physics
Work and Energy in PhysicsLarry Sultiz
 

Similar to Work and energy (20)

Work
WorkWork
Work
 
work power and energy.pptx
work power and energy.pptxwork power and energy.pptx
work power and energy.pptx
 
Work.pptx
Work.pptxWork.pptx
Work.pptx
 
Unit 1 module 2 work and energy
Unit 1 module 2 work and energyUnit 1 module 2 work and energy
Unit 1 module 2 work and energy
 
Energy, work, power
Energy, work, powerEnergy, work, power
Energy, work, power
 
Mechanical energy
Mechanical energyMechanical energy
Mechanical energy
 
WORK ENERGY POWER 8.pptx
WORK ENERGY POWER 8.pptxWORK ENERGY POWER 8.pptx
WORK ENERGY POWER 8.pptx
 
WORK ENERGY POWER 8.pptx
WORK ENERGY POWER 8.pptxWORK ENERGY POWER 8.pptx
WORK ENERGY POWER 8.pptx
 
Work and Power NOTES.pptx
Work and Power NOTES.pptxWork and Power NOTES.pptx
Work and Power NOTES.pptx
 
Do Work!
Do Work!Do Work!
Do Work!
 
WORK POWER AND ENERGY
WORK POWER AND ENERGYWORK POWER AND ENERGY
WORK POWER AND ENERGY
 
Physics Presentation
Physics PresentationPhysics Presentation
Physics Presentation
 
Work Power and Energy
Work Power and EnergyWork Power and Energy
Work Power and Energy
 
Work and energy
Work and energyWork and energy
Work and energy
 
lec4workpowerenergy-150127073027-conversion-gate01.pptx
lec4workpowerenergy-150127073027-conversion-gate01.pptxlec4workpowerenergy-150127073027-conversion-gate01.pptx
lec4workpowerenergy-150127073027-conversion-gate01.pptx
 
11workandenergy-150809064825-lva1-app6891.pdf
11workandenergy-150809064825-lva1-app6891.pdf11workandenergy-150809064825-lva1-app6891.pdf
11workandenergy-150809064825-lva1-app6891.pdf
 
work and energy
work and energywork and energy
work and energy
 
Work and power class
Work and power classWork and power class
Work and power class
 
class 9 chapter 11 work and energy very helpful presentation
class 9 chapter 11 work and energy very helpful presentationclass 9 chapter 11 work and energy very helpful presentation
class 9 chapter 11 work and energy very helpful presentation
 
Work and Energy in Physics
Work and Energy in PhysicsWork and Energy in Physics
Work and Energy in Physics
 

More from TekZeno

Buoyancy.ppt
Buoyancy.pptBuoyancy.ppt
Buoyancy.pptTekZeno
 
Acceleration
AccelerationAcceleration
AccelerationTekZeno
 
Universal forces
Universal forcesUniversal forces
Universal forcesTekZeno
 
Static electricity
Static electricityStatic electricity
Static electricityTekZeno
 
Projectile motion
Projectile motionProjectile motion
Projectile motionTekZeno
 
Newtons laws of_motion - 3rd law
Newtons laws of_motion - 3rd lawNewtons laws of_motion - 3rd law
Newtons laws of_motion - 3rd lawTekZeno
 
Newtons laws of_motion - 2nd law
Newtons laws of_motion - 2nd lawNewtons laws of_motion - 2nd law
Newtons laws of_motion - 2nd lawTekZeno
 
Newtons laws of_motion - 1st law
Newtons laws of_motion - 1st lawNewtons laws of_motion - 1st law
Newtons laws of_motion - 1st lawTekZeno
 
Magnetism
MagnetismMagnetism
MagnetismTekZeno
 
Light em&bigbang
Light em&bigbangLight em&bigbang
Light em&bigbangTekZeno
 
Gravity and motion
Gravity and motionGravity and motion
Gravity and motionTekZeno
 
Friction
FrictionFriction
FrictionTekZeno
 
Free body diagrams
Free body diagramsFree body diagrams
Free body diagramsTekZeno
 
Electricity
ElectricityElectricity
ElectricityTekZeno
 

More from TekZeno (20)

Buoyancy.ppt
Buoyancy.pptBuoyancy.ppt
Buoyancy.ppt
 
Acceleration
AccelerationAcceleration
Acceleration
 
Waves
WavesWaves
Waves
 
Universal forces
Universal forcesUniversal forces
Universal forces
 
Static electricity
Static electricityStatic electricity
Static electricity
 
Sound
SoundSound
Sound
 
Projectile motion
Projectile motionProjectile motion
Projectile motion
 
Power
PowerPower
Power
 
Newtons laws of_motion - 3rd law
Newtons laws of_motion - 3rd lawNewtons laws of_motion - 3rd law
Newtons laws of_motion - 3rd law
 
Newtons laws of_motion - 2nd law
Newtons laws of_motion - 2nd lawNewtons laws of_motion - 2nd law
Newtons laws of_motion - 2nd law
 
Newtons laws of_motion - 1st law
Newtons laws of_motion - 1st lawNewtons laws of_motion - 1st law
Newtons laws of_motion - 1st law
 
Motion2
Motion2Motion2
Motion2
 
Motion
MotionMotion
Motion
 
Metrics
MetricsMetrics
Metrics
 
Magnetism
MagnetismMagnetism
Magnetism
 
Light em&bigbang
Light em&bigbangLight em&bigbang
Light em&bigbang
 
Gravity and motion
Gravity and motionGravity and motion
Gravity and motion
 
Friction
FrictionFriction
Friction
 
Free body diagrams
Free body diagramsFree body diagrams
Free body diagrams
 
Electricity
ElectricityElectricity
Electricity
 

Recently uploaded

GBSN - Microbiology (Unit 6) Human and Microbial interaction
GBSN - Microbiology (Unit 6) Human and Microbial interactionGBSN - Microbiology (Unit 6) Human and Microbial interaction
GBSN - Microbiology (Unit 6) Human and Microbial interactionAreesha Ahmad
 
GBSN - Biochemistry (Unit 8) Enzymology
GBSN - Biochemistry (Unit 8) EnzymologyGBSN - Biochemistry (Unit 8) Enzymology
GBSN - Biochemistry (Unit 8) EnzymologyAreesha Ahmad
 
Introduction and significance of Symbiotic algae
Introduction and significance of  Symbiotic algaeIntroduction and significance of  Symbiotic algae
Introduction and significance of Symbiotic algaekushbuR
 
Molecular and Cellular Mechanism of Action of Hormones such as Growth Hormone...
Molecular and Cellular Mechanism of Action of Hormones such as Growth Hormone...Molecular and Cellular Mechanism of Action of Hormones such as Growth Hormone...
Molecular and Cellular Mechanism of Action of Hormones such as Growth Hormone...Ansari Aashif Raza Mohd Imtiyaz
 
Film Coated Tablet and Film Coating raw materials.pdf
Film Coated Tablet and Film Coating raw materials.pdfFilm Coated Tablet and Film Coating raw materials.pdf
Film Coated Tablet and Film Coating raw materials.pdfPharmatech-rx
 
family therapy psychotherapy types .pdf
family therapy psychotherapy types  .pdffamily therapy psychotherapy types  .pdf
family therapy psychotherapy types .pdfhaseebahmeddrama
 
POST TRANSCRIPTIONAL GENE SILENCING-AN INTRODUCTION.pptx
POST TRANSCRIPTIONAL GENE SILENCING-AN INTRODUCTION.pptxPOST TRANSCRIPTIONAL GENE SILENCING-AN INTRODUCTION.pptx
POST TRANSCRIPTIONAL GENE SILENCING-AN INTRODUCTION.pptxArpitaMishra69
 
FORENSIC CHEMISTRY ARSON INVESTIGATION.pdf
FORENSIC CHEMISTRY ARSON INVESTIGATION.pdfFORENSIC CHEMISTRY ARSON INVESTIGATION.pdf
FORENSIC CHEMISTRY ARSON INVESTIGATION.pdfSuchita Rawat
 
Developing Distributed High-performance Computing Capabilities of an Open Sci...
Developing Distributed High-performance Computing Capabilities of an Open Sci...Developing Distributed High-performance Computing Capabilities of an Open Sci...
Developing Distributed High-performance Computing Capabilities of an Open Sci...Globus
 
Biochemistry and Biomolecules - Science - 9th Grade by Slidesgo.pptx
Biochemistry and Biomolecules - Science - 9th Grade by Slidesgo.pptxBiochemistry and Biomolecules - Science - 9th Grade by Slidesgo.pptx
Biochemistry and Biomolecules - Science - 9th Grade by Slidesgo.pptxjayabahari688
 
WASP-69b’s Escaping Envelope Is Confined to a Tail Extending at Least 7 Rp
WASP-69b’s Escaping Envelope Is Confined to a Tail Extending at Least 7 RpWASP-69b’s Escaping Envelope Is Confined to a Tail Extending at Least 7 Rp
WASP-69b’s Escaping Envelope Is Confined to a Tail Extending at Least 7 RpSérgio Sacani
 
Triploidy ...............................pptx
Triploidy ...............................pptxTriploidy ...............................pptx
Triploidy ...............................pptxCherry
 
MSCII_ FCT UNIT 5 TOXICOLOGY.pdf
MSCII_              FCT UNIT 5 TOXICOLOGY.pdfMSCII_              FCT UNIT 5 TOXICOLOGY.pdf
MSCII_ FCT UNIT 5 TOXICOLOGY.pdfSuchita Rawat
 
Exomoons & Exorings with the Habitable Worlds Observatory I: On the Detection...
Exomoons & Exorings with the Habitable Worlds Observatory I: On the Detection...Exomoons & Exorings with the Habitable Worlds Observatory I: On the Detection...
Exomoons & Exorings with the Habitable Worlds Observatory I: On the Detection...Sérgio Sacani
 
Extensive Pollution of Uranus and Neptune’s Atmospheres by Upsweep of Icy Mat...
Extensive Pollution of Uranus and Neptune’s Atmospheres by Upsweep of Icy Mat...Extensive Pollution of Uranus and Neptune’s Atmospheres by Upsweep of Icy Mat...
Extensive Pollution of Uranus and Neptune’s Atmospheres by Upsweep of Icy Mat...Sérgio Sacani
 
Isolation of AMF by wet sieving and decantation method pptx
Isolation of AMF by wet sieving and decantation method pptxIsolation of AMF by wet sieving and decantation method pptx
Isolation of AMF by wet sieving and decantation method pptxGOWTHAMIM22
 
NUMERICAL Proof Of TIme Electron Theory.
NUMERICAL Proof Of TIme Electron Theory.NUMERICAL Proof Of TIme Electron Theory.
NUMERICAL Proof Of TIme Electron Theory.syedmuneemqadri
 
PHOTOSYNTHETIC BACTERIA (OXYGENIC AND ANOXYGENIC)
PHOTOSYNTHETIC BACTERIA  (OXYGENIC AND ANOXYGENIC)PHOTOSYNTHETIC BACTERIA  (OXYGENIC AND ANOXYGENIC)
PHOTOSYNTHETIC BACTERIA (OXYGENIC AND ANOXYGENIC)kushbuR
 
VILLAGE ATTACHMENT For rural agriculture PPT.pptx
VILLAGE ATTACHMENT For rural agriculture  PPT.pptxVILLAGE ATTACHMENT For rural agriculture  PPT.pptx
VILLAGE ATTACHMENT For rural agriculture PPT.pptxAQIBRASOOL4
 
Mining Activity and Investment Opportunity in Myanmar.pptx
Mining Activity and Investment Opportunity in Myanmar.pptxMining Activity and Investment Opportunity in Myanmar.pptx
Mining Activity and Investment Opportunity in Myanmar.pptxKyawThanTint
 

Recently uploaded (20)

GBSN - Microbiology (Unit 6) Human and Microbial interaction
GBSN - Microbiology (Unit 6) Human and Microbial interactionGBSN - Microbiology (Unit 6) Human and Microbial interaction
GBSN - Microbiology (Unit 6) Human and Microbial interaction
 
GBSN - Biochemistry (Unit 8) Enzymology
GBSN - Biochemistry (Unit 8) EnzymologyGBSN - Biochemistry (Unit 8) Enzymology
GBSN - Biochemistry (Unit 8) Enzymology
 
Introduction and significance of Symbiotic algae
Introduction and significance of  Symbiotic algaeIntroduction and significance of  Symbiotic algae
Introduction and significance of Symbiotic algae
 
Molecular and Cellular Mechanism of Action of Hormones such as Growth Hormone...
Molecular and Cellular Mechanism of Action of Hormones such as Growth Hormone...Molecular and Cellular Mechanism of Action of Hormones such as Growth Hormone...
Molecular and Cellular Mechanism of Action of Hormones such as Growth Hormone...
 
Film Coated Tablet and Film Coating raw materials.pdf
Film Coated Tablet and Film Coating raw materials.pdfFilm Coated Tablet and Film Coating raw materials.pdf
Film Coated Tablet and Film Coating raw materials.pdf
 
family therapy psychotherapy types .pdf
family therapy psychotherapy types  .pdffamily therapy psychotherapy types  .pdf
family therapy psychotherapy types .pdf
 
POST TRANSCRIPTIONAL GENE SILENCING-AN INTRODUCTION.pptx
POST TRANSCRIPTIONAL GENE SILENCING-AN INTRODUCTION.pptxPOST TRANSCRIPTIONAL GENE SILENCING-AN INTRODUCTION.pptx
POST TRANSCRIPTIONAL GENE SILENCING-AN INTRODUCTION.pptx
 
FORENSIC CHEMISTRY ARSON INVESTIGATION.pdf
FORENSIC CHEMISTRY ARSON INVESTIGATION.pdfFORENSIC CHEMISTRY ARSON INVESTIGATION.pdf
FORENSIC CHEMISTRY ARSON INVESTIGATION.pdf
 
Developing Distributed High-performance Computing Capabilities of an Open Sci...
Developing Distributed High-performance Computing Capabilities of an Open Sci...Developing Distributed High-performance Computing Capabilities of an Open Sci...
Developing Distributed High-performance Computing Capabilities of an Open Sci...
 
Biochemistry and Biomolecules - Science - 9th Grade by Slidesgo.pptx
Biochemistry and Biomolecules - Science - 9th Grade by Slidesgo.pptxBiochemistry and Biomolecules - Science - 9th Grade by Slidesgo.pptx
Biochemistry and Biomolecules - Science - 9th Grade by Slidesgo.pptx
 
WASP-69b’s Escaping Envelope Is Confined to a Tail Extending at Least 7 Rp
WASP-69b’s Escaping Envelope Is Confined to a Tail Extending at Least 7 RpWASP-69b’s Escaping Envelope Is Confined to a Tail Extending at Least 7 Rp
WASP-69b’s Escaping Envelope Is Confined to a Tail Extending at Least 7 Rp
 
Triploidy ...............................pptx
Triploidy ...............................pptxTriploidy ...............................pptx
Triploidy ...............................pptx
 
MSCII_ FCT UNIT 5 TOXICOLOGY.pdf
MSCII_              FCT UNIT 5 TOXICOLOGY.pdfMSCII_              FCT UNIT 5 TOXICOLOGY.pdf
MSCII_ FCT UNIT 5 TOXICOLOGY.pdf
 
Exomoons & Exorings with the Habitable Worlds Observatory I: On the Detection...
Exomoons & Exorings with the Habitable Worlds Observatory I: On the Detection...Exomoons & Exorings with the Habitable Worlds Observatory I: On the Detection...
Exomoons & Exorings with the Habitable Worlds Observatory I: On the Detection...
 
Extensive Pollution of Uranus and Neptune’s Atmospheres by Upsweep of Icy Mat...
Extensive Pollution of Uranus and Neptune’s Atmospheres by Upsweep of Icy Mat...Extensive Pollution of Uranus and Neptune’s Atmospheres by Upsweep of Icy Mat...
Extensive Pollution of Uranus and Neptune’s Atmospheres by Upsweep of Icy Mat...
 
Isolation of AMF by wet sieving and decantation method pptx
Isolation of AMF by wet sieving and decantation method pptxIsolation of AMF by wet sieving and decantation method pptx
Isolation of AMF by wet sieving and decantation method pptx
 
NUMERICAL Proof Of TIme Electron Theory.
NUMERICAL Proof Of TIme Electron Theory.NUMERICAL Proof Of TIme Electron Theory.
NUMERICAL Proof Of TIme Electron Theory.
 
PHOTOSYNTHETIC BACTERIA (OXYGENIC AND ANOXYGENIC)
PHOTOSYNTHETIC BACTERIA  (OXYGENIC AND ANOXYGENIC)PHOTOSYNTHETIC BACTERIA  (OXYGENIC AND ANOXYGENIC)
PHOTOSYNTHETIC BACTERIA (OXYGENIC AND ANOXYGENIC)
 
VILLAGE ATTACHMENT For rural agriculture PPT.pptx
VILLAGE ATTACHMENT For rural agriculture  PPT.pptxVILLAGE ATTACHMENT For rural agriculture  PPT.pptx
VILLAGE ATTACHMENT For rural agriculture PPT.pptx
 
Mining Activity and Investment Opportunity in Myanmar.pptx
Mining Activity and Investment Opportunity in Myanmar.pptxMining Activity and Investment Opportunity in Myanmar.pptx
Mining Activity and Investment Opportunity in Myanmar.pptx
 

Work and energy

  • 2. Energy • The ability to do work Work • Using energy to exert a force to move an object
  • 3. Work = Energy & Energy = Work • The work done is equal to the energy used to do the work.
  • 4. Calculating Work: W = 0, if F = 0 W = F d W = 0, if d = 0 No work done if object doesn’t move. No work done, whenever there is no force. Unit: Joule (J) is a Nm
  • 5. A person pushes with a 110 N force for a distance of 30 m. How much work was done? Examples: W = F d W = ( 110 N ) ( 30 m ) W = 3300 N m or W = 3300 J 1 Joule (J) = 1 N m
  • 7. Kinetic Energy: Energy in Motion Calculating KE: KE = ½ m v2
  • 8. KE = 72 J Example: What is the KE of 100 kg of water moving at 1.2 m/sec? KE = 72 ( kg m )/s 22 KE = mv 2 2 1 KE = ( 100 kg ) ( 1.2 m/s ) 2 2 1 KE = ( 100 kg ) ( 1.44 m /s ) 22 2 1
  • 9. KE = mvKinetic Energy Fact: 2 2 1 The kinetic energy increases dramatically with increasing speed. 35 mi/hr 4 x speed 16 x energy 140 mi/hr70 mi/hr 2 x speed 4 x energy
  • 10. What is Potential Energy? oEnergy that is stored and waiting to be used later
  • 11. What is Potential Energy? o Potential energy is stored energy o P.E. = mass x gravity x height o P.E. = mghDon’t look down, Rover! Good boy!
  • 12. Law of Conservation of Energy • Energy cannot be created or destroyed • Energy can be transferred from one type or state to another