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Energy 
Sarah Jones 
http://fabianoefner.com
http://fabianoefner.com
Work 
• When a force (Newton, N) moves an object 
work is done. 
• Work is a measure of the amount of energy 
(Joules, J) ...
Force Diagrams
• Thrust – a forward push 
• Upthrust – the upwards force on a body in a 
liquid or a gas
Power 
• Power (Watts, W) is the rate that work is done 
– how fast energy is used. 
http://www.bestwallpaperphoto.com
Kinetic Energy 
• The energy of motion. 
• All moving things have kinetic energy. 
painincorporated.com
Calculating kinetic energy 
Ek = ½mv2 
m = mass of object (kg) 
v = the objects speed (m/s) 
www.cyberphysics.co.uk
Potential Energy 
• An object can store energy – this is dependent 
on position. 
• Includes - gravitational, chemical and...
Electrical Energy Kinetic Energy
Kinetic Energy Electrical Energy
Electrical Energy Sound Energy
Electrical Energy Heat Energy
Light Energy Electrical Energy
Elastic Energy Kinetic Energy
Chemical Energy Heat Energy
Gravitational Energy Electrical Energy
Gravitational Energy Kinetic Energy
Gravitational Potential Energy 
Ep = mgh 
m = mass (kg) 
g = acceleration due to gravity (9.8 m/s2) 
h = height (m) 
http:...
Law of Conservation of Energy 
• States that energy cannot be created or 
destroyed, just transformed from one form to 
an...
Et = Ep + Ek 
www.physicsclassroom.com
Energy Conversion Efficiency 
• Some energy can be ‘lost’ as heat and sound. 
• Energy is lost in the form of heat and sou...
Television 
Electrical Light, Sound and Heat
Stereo 
Electrical Sound and Heat
Car Engine 
Chemical Kinetic, Sound and Heat
Energy Transfers - Boardworks 
Light Bulbs 
Electrical Energy Light and Heat
Energy
Energy
Energy
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Energy

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Year 10 Energy - For additional resources visit: http://www.iheartscience.net

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Energy

  1. 1. Energy Sarah Jones http://fabianoefner.com
  2. 2. http://fabianoefner.com
  3. 3. Work • When a force (Newton, N) moves an object work is done. • Work is a measure of the amount of energy (Joules, J) used in moving the object. work done = force applied x distance moved W = F x d http://www.bbc.co.uk/bitesize/
  4. 4. Force Diagrams
  5. 5. • Thrust – a forward push • Upthrust – the upwards force on a body in a liquid or a gas
  6. 6. Power • Power (Watts, W) is the rate that work is done – how fast energy is used. http://www.bestwallpaperphoto.com
  7. 7. Kinetic Energy • The energy of motion. • All moving things have kinetic energy. painincorporated.com
  8. 8. Calculating kinetic energy Ek = ½mv2 m = mass of object (kg) v = the objects speed (m/s) www.cyberphysics.co.uk
  9. 9. Potential Energy • An object can store energy – this is dependent on position. • Includes - gravitational, chemical and elastic energy. www.physicsclassroom.com
  10. 10. Electrical Energy Kinetic Energy
  11. 11. Kinetic Energy Electrical Energy
  12. 12. Electrical Energy Sound Energy
  13. 13. Electrical Energy Heat Energy
  14. 14. Light Energy Electrical Energy
  15. 15. Elastic Energy Kinetic Energy
  16. 16. Chemical Energy Heat Energy
  17. 17. Gravitational Energy Electrical Energy
  18. 18. Gravitational Energy Kinetic Energy
  19. 19. Gravitational Potential Energy Ep = mgh m = mass (kg) g = acceleration due to gravity (9.8 m/s2) h = height (m) http://www.bbc.co.uk/schools/gcsebitesize
  20. 20. Law of Conservation of Energy • States that energy cannot be created or destroyed, just transformed from one form to another. – Therefore, energy never ‘disappears’. – Energy that is transferred to unwanted forms is wasted energy.
  21. 21. Et = Ep + Ek www.physicsclassroom.com
  22. 22. Energy Conversion Efficiency • Some energy can be ‘lost’ as heat and sound. • Energy is lost in the form of heat and sound each time the rollercoaster moves. If this did not occur the rollercoaster would keep on moving forever.
  23. 23. Television Electrical Light, Sound and Heat
  24. 24. Stereo Electrical Sound and Heat
  25. 25. Car Engine Chemical Kinetic, Sound and Heat
  26. 26. Energy Transfers - Boardworks Light Bulbs Electrical Energy Light and Heat

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