Transcript Potential energy

Potential and conservative
energy
What is energy?
In physics and other sciences, energy
(from the Greek ἐνέργεια - energeia,
"activity, operation", from ἐνεργός energos, "active, working"[1]) is a scalar
physical quantity that is a property of
objects and systems which is conserved
by nature. Energy is often defined as the
ability to do
work.
Several different forms of energy,
including kinetic, potential, thermal,
gravitational, sound energy, light energy,
elastic, electromagnetic, chemical,
nuclear, and mass have been defined to
explain all known natural phenomena.
Energy is converted from
one form to another. This
principle, the conservation of
energy .
Conservative Force
A conservative force may be defined as
one for which the work done in moving
between two points A and B is
independent of the path taken between
the two points. The implication of
"conservative" in this context is that
you could move it from A to B by one
path and return to A by another path
with no net loss of energy - any closed
return path to A takes net zero work.
A further implication is that the energy of an 
object which is subject only to that conservative
force is dependent upon its position and not
upon the path by which it reached that position.
This makes it possible to define a potential
energy function which depends upon position
only
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
potential energy), 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
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

Potential energy can be thought of as energy
stored within a physical system. It is called
potential energy because it has the potential to be
converted into other forms of energy, such as
kinetic energy, and to do work in the process.
The standard (SI) unit of measure for potential
energy is the joule, the same as for work, or
energy in general.
Potential energy is
the energy which is
stored.
Types of potential
energy.
Gravitational energy is
the potential energy
associated with
gravitational force
.
Elastic Chemical potential energy
Chemical potential energy is a form of
potential energy related to the structural
arrangement of atoms or molecules.
The electrostatic potential
energy is the energy of an
electrically charged particle
Conservative Forces and 
Potential Energy
Conservative Forces are
reversible forces, meaning that the
work done by a conservative force
is recoverable, i.e. you can get out
any work you put in or vise versa.
 When you apply an external agent to change the
state of a system that is also acted upon by a
conservative force then the system can be
restored to its initial state without using any
other external agent. Lifting a rock is one
example.
When you apply an external agent to change the
state of a system that is also acted upon by a
conservative force then the system can be restored
to its initial state without using any other external
agent. Lifting a rock is one example.
The Relation between
potential energy and force
Potential energy is closely linked
with forces. If the work done
moving along a path which
starts and ends in the same
location is zero, then the force
is said to be conservative and it
is possible to define a numerical
value of potential associated
with every point in space. A
force field can be re-obtained by
taking the vector gradient of
the potential field.
Done by : Ghada al-husseini
Physical science 101 
Student no. 200622041
Dr. Awatif Hindi 
