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Advanced Mechanism Design (Ue19Me544) : Potential Energy Kinetic Energy Conservation of Energy

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ENERGY AND MOMENTUM

ADVANCED MECHANISM DESIGN (UE19ME544)

ENERGY POTENTIAL ENERGY KINETIC ENERGY CONSERVATION OF


All object possess
ENERGY
energy. This can Potential energy is defined Kinetic energy is the energy The law of conservation of
come from having as mechanical energy, stored that an object has because of energy states that the total
work done on it at energy, or energy caused by its motion. This energy can energy of an isolated system
some point in time. its position. The energy that be converted into other remains constant. it is said to
Generally, there are a ball has when perched at a kinds, such as gravitational be conserved over time. This
two kinds of energy top of a steep hill while it is or electric potential energy. law, first proposed and tested
in mechanical about to roll down is an by Emilie du Chatelet,
systems, potential an example of potential energy means that energy can
d kinetic. Potential neither be created nor
energy is due to the destroyed, rather, it can only
position of the be transformed or
object and kinetic transferred from one form
energy is due to its to another.
movement.
EQUIBRIUM AND KINETIC ENERGY OF
STABILITY A SYSTEM
Equilibrium is the condition of a Consider a system of N particles, and
system when neither its state of motion let 𝑟𝑖 be the position vector of the 𝑖𝑡ℎ
MOMENTUM nor its internal energy state tends to particle relative to the point O fixed
Momentum can be change with time. For a single particle, in the initial frame as shown in figure
defined as "mass in equilibrium arises if the vector sum of below.
motion." All objects all forces acting upon the particle is
have mass; so if an zero.
object is moving, Stability refers to the ability of a body
then it has to restore to its original static
momentum - it has equilibrium, after it has been slightly
its mass in motion. displaced.
The amount of
momentum that an
object has is
dependent upon two
variables: how much
stuff is moving and
how fast the stuff is
moving. ANGULAR MOMENTUM GENERALIZED MOMENTUM
Angular momentum is about the The generalized momentum of
momentum of a rotating body. For analytical (Lagrangian, Hamiltonian)
example, if a body rotates at r distance formulations of classical mechanics is
SUBMITTTED BY from centre of rotation we calculate defined as the partial derivative of the
angular momentum by multiplying the Lagrangian with regards to the time
Syed Hafeez Peeran
linear momentum p=mv by a fixed derivative of generalized coordinates:
Quadri
radial distance r. Hence, angular pi=∂L∂˙qi. where: pi is the 𝑖𝑡ℎ
PES1PG19ME011
momentum L= r x mv. Angular coordinate of the generalized
momentum is a vector quantity. momenta.

REFERANCE – Greenwood D T, 1977, “Classical Dynamics”, Dover Publications, New York.

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