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What is the energy in a stretched wire?
The energy stored per unit volume of the stretched wire is called
its energy density
. The change in dimensions per unit original dimension along the force is applied is called longitudinal strain. The change in dimension in the per unit dimension in perpendicular direction is called lateral strain and is denoted by β.
Is stretched potential energy?
Elastic potential energy
is the energy stored in an object that is stretched or compressed. Elastic potential energy can be stored in the elastic objects such as springs, rubber bands etc. Any spring that is stretched or compressed has stored elastic potential energy.
How do you calculate the energy of a stretched wire?
- Work done on the wire during stretching = average force x extension = 1⁄2 Fe. …
- work done = energy stored = 1⁄2 Fe = 1⁄2 EAe
2
/L. … - Energy stored = 1⁄2 F[e
2
– e
1
] = 1⁄2 EA[e
2
2
– e
1
2
]/L. … - Energy stored per unit volume of a specimen = 1⁄2 stress x strain.
Why is energy stored in a stretched wire?
When a body is deformed,
work is done by the deforming forces against the intermolecular force of attraction between the molecules of the body
. This work done is stored in the body in the form of elastic potential energy.
What is elastic potential energy of a stretched wire?
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Does a stretched spring have potential energy?
As soon as the spring is stretched or compressed, there is
positive potential energy stored
in the spring.
Which point has the most potential energy?
Potential energy is greatest
when the most energy is stored
. This could be when an object reaches its highest point in the air before falling, a rollercoaster just before it drops, or when a rubber band is stretched as far back as possible before it snaps. Potential energy is then converted to kinetic energy.
How do I calculate potential energy?
The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is
P.E. = mgh
, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s
2
at the surface of the earth) and h is the height in meters.
What is work done formula?
Mathematically, the concept of work done W equals the force f times the distance (d), that is W = f. d and if the force is exerted at an angle θ to the displacement, then work done is calculated as
W = f . d cos θ
.
What is strain energy and its formula?
The strain energy per unit volume is known as strain energy density and the area under the stress-strain curve towards the point of deformation. When the applied force is released, the whole system returns to its original shape. It is usually denoted by U. The strain energy formula is given as,
U = Fδ / 2
.
What will be the potential energy per unit volume of a stretched wire?
half of stress× strain
.
How do you calculate total strain energy stored?
- 1] The strain energy formula is: U = frac {F delta } { 2}
- 2] When stress sigma is proportional to strain epsilon, the strain energy formula is: U = frac {1}{2} V sigma epsilon.
- 3] Regarding young’s modulus E, the strain energy formula is : U = frac {{sigma}^2 }{2E} times V.
What energies are potential?
Potential energy of an object is found in its position, not its motion. It is
the energy of position
. When objects are displaced from positions of equilibrium, they gain energy that was stored in the objects before being knocked out of equilibrium by elastic rebound, gravity, or chemical reactions.
What is the work done in stretching a wire?
In stretching a wire work is done
against internal restoring forces
. This work is stored as elastic potential energy or strain energy.
What is the formula for calculating elastic potential energy?
The spring constant is the measure of stiffness of a spring. Hooke’s law gives us the force we need to find elastic potential energy. Looking at a graph of force versus displacement, we can find that the formula for elastic potential energy is
PE = 1/2(kx^2).
