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Energy
Presented by:
Samsil Arefin
Daffodil International University
Student ID: 161-15-7197
Agenda
• Introduction of Energy
• Types of Energy
• Energy Conservation Rule
• Sources of Energy
8/17/2016 2
Definition
• Energy is the capacity of a physical system to
perform work.
• The SI unit of energy is the joule (J) or
Newton-meter (Nm).
• The joule is also the SI unit of work.
• A scalar quantity
8/17/2016 3
Forms of Energy
• Kinetic energy
• Potential energy
• Mechanical energy
• Chemical energy
• Nuclear energy
• Renewable energy etc.
8/17/2016 4
Kinetic Energy
• Kinetic energy is a form of
energy that represents
the energy of motion.
• Scalar quantity and SI unit
is the joule.
• Measured by:
KE= ½ (Mass) (Velocity)2
• Examples: Water falling
over the fall, A Yo-Yo in
motion
8/17/2016 5
Potential Energy
• Energy due to position or
stored energy.
• SI unit is the joule
• Measure by:
PE=weight*gravity*Height
• Example:
Drawing a Bow-> Stores
energy because of position
8/17/2016 6
Energy Conservation Rule
• Energy can neither be created or destroyed.
• It can be converted from one form into another.
• For example:
Kinetic energy is converted into heat energy.
Potential energy is converted to kinetic
energy.
Chemical energy to Heat energy
• It can be stored
8/17/2016 7
Sources of Energy
• Biggest source of energy is our
Sun
• Two types of energy sources:
Conventional,
Nonconventional source
• Conventional sources:
– Coal
– Oil
– Gas
8/17/2016 8
Sources of Energy (Contd.)
• Nonconventional source/
Renewable Energy
sources: Solar, Wind, Bio
fuel etc.
• These sources have not
been traditionally used
as Energy source
• However, these sources
will always be available
in nature and are
renewable.
8/17/2016 9
Thank You
8/17/2016 10

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Energy

  • 1. Energy Presented by: Samsil Arefin Daffodil International University Student ID: 161-15-7197
  • 2. Agenda • Introduction of Energy • Types of Energy • Energy Conservation Rule • Sources of Energy 8/17/2016 2
  • 3. Definition • Energy is the capacity of a physical system to perform work. • The SI unit of energy is the joule (J) or Newton-meter (Nm). • The joule is also the SI unit of work. • A scalar quantity 8/17/2016 3
  • 4. Forms of Energy • Kinetic energy • Potential energy • Mechanical energy • Chemical energy • Nuclear energy • Renewable energy etc. 8/17/2016 4
  • 5. Kinetic Energy • Kinetic energy is a form of energy that represents the energy of motion. • Scalar quantity and SI unit is the joule. • Measured by: KE= ½ (Mass) (Velocity)2 • Examples: Water falling over the fall, A Yo-Yo in motion 8/17/2016 5
  • 6. Potential Energy • Energy due to position or stored energy. • SI unit is the joule • Measure by: PE=weight*gravity*Height • Example: Drawing a Bow-> Stores energy because of position 8/17/2016 6
  • 7. Energy Conservation Rule • Energy can neither be created or destroyed. • It can be converted from one form into another. • For example: Kinetic energy is converted into heat energy. Potential energy is converted to kinetic energy. Chemical energy to Heat energy • It can be stored 8/17/2016 7
  • 8. Sources of Energy • Biggest source of energy is our Sun • Two types of energy sources: Conventional, Nonconventional source • Conventional sources: – Coal – Oil – Gas 8/17/2016 8
  • 9. Sources of Energy (Contd.) • Nonconventional source/ Renewable Energy sources: Solar, Wind, Bio fuel etc. • These sources have not been traditionally used as Energy source • However, these sources will always be available in nature and are renewable. 8/17/2016 9