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  1. 1. ENGLISH PRESENTATION BY GROUP 2 MEMBERS: CIKAL GILANG R. FAUZAN FITRIA GISELA ADELITA INDAH WULANDARI M. ZAKKY RAFSANJANI A. RAHAYU DWI H. PHYSICS C 2013
  2. 2. ENERGY POTENSIAL ENERGY KINETIC ENERGY
  3. 3. ENERGY Energy is one of the basic quantitative properties describing a physical system or object's state. Energy can be transformed (converted) among a number of forms that may each manifest and be measurable in differing ways. The law of conservation of energy states that the (total) energy of a system can increase or decrease only by transferring it in or out of the system. The total energy of a system can be calculated by simple addition when it is composed of multiple non-interacting parts or has multiple distinct forms of energy. Common energy forms include the kinetic energy of a moving object, the radiant energy carried by light and other electromagnetic radiation, and various types of potential energy such as gravitational and elastic. Energy is measured in SI units of joules (J). Common types of energy transfer and transformation include processes such as heating a material, performing mechanical work on an object, generating or making use of electric energy, and many chemical reactions.
  4. 4. POTENTIAL ENERGY Potential energy is energy which results from position or configuration. An object may have the capacity for doing work as a result of its position in a gravitational field (gravitational potensial energy), and an electric field (electric potential energy or a magnetic field (magnetic potential energy) It may have elastic potential energy as a result of a stretched spring or other elastic deformation. NEXT
  5. 5. POTENTIAL ENERGY POTENTIAL ENERGY FUNCTION If a force acting on an object is a function of position only, it is said to be a conservative force, and it can be represented by a potential energy function which for a one-dimensional case satisfies the derivative condition NEXT
  6. 6. POTENTIAL ENERGY POTENTIAL ENERGY CONCEPTS The potential energy U is equal to the work you must do to move an object from the U=0 reference point to the position r. The force on an object is the negative of the derivative of the potential function U. NEXT
  7. 7. POTENTIAL ENERGY NEGATIVE SIGNS IN POTENTIAL F in the definition of potential energy is the force exerted by the force field, e.g., gravity, spring force, etc. The potential energy U is equal to the work you must do against that force to move an object from the U=0 reference point to the position r. ELECTRIC POTENTIAL ENERGY OR A MAGNETIC FIELD AND MAGNETIC POTENTIAL ENERGY GRAVITATIONAL POTENSIAL ENERGY VIDEO
  8. 8. POTENTIAL ENERGY Gravitational potential energy is the energy stored in an object as the result of its vertical position or height. PEgrav = mass • g • height ELECTRIC POTENTIAL ENERGY OR A MAGNETIC FIELD AND MAGNETIC POTENTIAL ENERGY GRAVITATIONAL POTENSIAL ENERGY VIDEO
  9. 9. POTENTIAL ENERGY Electric potential energy or a magnetic field and magnetic potential energy are related by maxwell’s equations. ELECTRIC POTENTIAL ENERGY OR A MAGNETIC FIELD AND MAGNETIC POTENTIAL ENERGY GRAVITATIONAL POTENSIAL ENERGY VIDEO
  10. 10. VIDEO
  11. 11. KINETIC ENERGY Kinetic energy is the energy of motion. Kinetic energy is a scalar quantity; it does not have a direction. The amount of translational kinetic energy (from here on, the phrase kinetic energy will refer to translational kinetic energy) that an object has depends upon two variables: the mass (m) of the object and the speed (v) of the object. VIDEO
  12. 12. VIDEO NEXT
  13. 13. CONCLUSIONs Energy is one of the basic quantitative properties describing a physical system or object's state. Energy can be transformed (converted) among a number of forms that may each manifest and be measurable in differing ways. NEXT
  14. 14. CONCLUSIONs Potential energy is devided into two, that is: • Gravitational potential energy • Electric potential energy or a magnetic field and magnetic potential energy Kinetic energy is the energy of motion and a scalar quantity; it does not have a direction.
  15. 15. Thanks for your attention…

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