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Energy

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Fareeda Beegum R S

The document defines energy as the ability to do work and discusses its various forms including potential, kinetic, heat, chemical, and electrical energy. It states that energy is measured in joules and can be transformed from one form to another but cannot be created or destroyed based on the law of conservation of energy. Kinetic energy is defined as the energy from an object's motion and depends on its mass and velocity, while potential energy depends on an object's position or configuration and is calculated using mass, height, and gravity. Examples of energy transformation include potential to kinetic energy when an object falls and kinetic to potential when thrown upwards.

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FAREEDA BEEGUM.R.S PHYSICAL SCIENCE
? ENERGY is defined as the capacity or ability of a body to do work. ? ENERGY has only magnitude and no direction. ? Whenever work is done , energy is consumed. ? S.I unit of energy is joule {J}.
? The amount of energy possessed by a body is equal to the amount of work it can do when energy is released. ? The object which does the work ¡­¡­loses energy. ? The object on which the work done¡­.gains energy.
VARIOUS FORMS OF ENERGY ? Potential energy. ? Kinetic energy. ? Heat energy. ? Chemical energy. ? Electrical energy. ? Light energy
Mechanical energy Kinetic energy Potential energy
KINETIC ENERGY ? ENERGY possessed by a body due to its motion is termed as Kinetic energy. ? Kinetic energy increases with speed. ? If ¡°m¡± is the mass and ¡°v¡± is the velocity of the body, K.E ? mv2
POTENTIAL ENERGY ? The energy possessed by a body due to its relative position or configaration. ? The potential energy of an object at a height depends on the ground level or zero level you choose. ? If ¡°m¡± is mass and ¡°h¡± is height and ¡°g¡± is the acceleration due to gravity, potential energy associated is given by P.E mgh.
TRANSFORMATION OF ENERGY The change of one form of energy in to another form is known as transformation energy. 1. When a body released from a height its P.E changes to K.E. 2. When a body is thrown upwards the K.E of the body is gradually changes or transformed in to P.E.
EXAMPLES OF TRANSFORMATION OF ENERGY ? At hydroelectric power station , P.E K.E Electric energy. Steam Engine , Heat energy K.E Thermal power station , Chemical energy heat energy electric energy.
LAW OF CONSERVATION OF ENERGY Energy can neither be created nor be destroyed .The total amount of energy in the universe remains the same. It only get transformed from one form to another.

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Energy

  • 2. ? ENERGY is defined as the capacity or ability of a body to do work. ? ENERGY has only magnitude and no direction. ? Whenever work is done , energy is consumed. ? S.I unit of energy is joule {J}.
  • 3. ? The amount of energy possessed by a body is equal to the amount of work it can do when energy is released. ? The object which does the work ¡­¡­loses energy. ? The object on which the work done¡­.gains energy.
  • 4. VARIOUS FORMS OF ENERGY ? Potential energy. ? Kinetic energy. ? Heat energy. ? Chemical energy. ? Electrical energy. ? Light energy
  • 5. Mechanical energy Kinetic energy Potential energy
  • 6. KINETIC ENERGY ? ENERGY possessed by a body due to its motion is termed as Kinetic energy. ? Kinetic energy increases with speed. ? If ¡°m¡± is the mass and ¡°v¡± is the velocity of the body, K.E ? mv2
  • 7. POTENTIAL ENERGY ? The energy possessed by a body due to its relative position or configaration. ? The potential energy of an object at a height depends on the ground level or zero level you choose. ? If ¡°m¡± is mass and ¡°h¡± is height and ¡°g¡± is the acceleration due to gravity, potential energy associated is given by P.E mgh.
  • 8. TRANSFORMATION OF ENERGY The change of one form of energy in to another form is known as transformation energy. 1. When a body released from a height its P.E changes to K.E. 2. When a body is thrown upwards the K.E of the body is gradually changes or transformed in to P.E.
  • 9. EXAMPLES OF TRANSFORMATION OF ENERGY ? At hydroelectric power station , P.E K.E Electric energy. Steam Engine , Heat energy K.E Thermal power station , Chemical energy heat energy electric energy.
  • 10. LAW OF CONSERVATION OF ENERGY Energy can neither be created nor be destroyed .The total amount of energy in the universe remains the same. It only get transformed from one form to another.