This document is an English presentation by Group 2 on the topic of energy. It discusses three main types of energy: energy in general, potential energy, and kinetic energy. Potential energy is divided into gravitational potential energy and electric/magnetic potential energy. Kinetic energy is the energy of motion and depends on an object's mass and speed. The presentation provides formulas and examples to explain these different types of energy and how energy can be transformed between forms while its total amount remains conserved.

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. ENERGY
POTENSIAL ENERGY
KINETIC ENERGY

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. 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.
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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
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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.
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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. 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. 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. VIDEO

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. VIDEO
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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.
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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. Thanks for your attention…