Questions tagged [potential-energy]
Potential energy is the energy of a body or a system due to the position of the body or the arrangement of the particles of the system.
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Can a particle with non-zero angular momentum pass through the center of a spherical potential?
Suppose you have a particle of mass $m$ moving in a potential $V(r) = -\frac{k}{r^2}$, with $r^2 = x^2+y^2+z^2$ and $k > 0$. Since the angular momentum $l$ is conserved, the particle will move in a ...
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Capacitor's voltage
Imagine I have two plates that form a capacitor, so the magnitude of the charge in each plate is, let's say, $Q$. So, the force, in respect to the distance $d$, is gonna be:
$$F(d) = k\frac{Q^2}{d^2}$$...
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potential energy change in conservative field
Is it true that potential energy of a particle always decreases in the direction of conservative force acting on it?
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Why do organisms accumulate potential energy?
I can understand that animals need some battaries to run. But, we learn that plants serve like batteries for animals because they accumulate the sun energy in the first place! You can eat them or burn ...
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We create systems with different values of Energy? [closed]
I understand that Energy is a conserved quantity in a system.
A number, that's always the same to the system. However, don't we determine such a number?
I mean, we can create systems(Or study them ...
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Electrostatic Potential Energy Derivation
How is the boxed step , physically as well as mathematically justified and correct ?
Source:Wiki http://en.wikipedia.org/wiki/Electric_potential_energy
As work done = $- \Delta U $. for Conservative ...
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Elastic potential energy of compressed spring? [duplicate]
If a compressed spring is dissolved in acid what happens to the elastic potential energy of the spring?
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Deriving the curve of a cantilever
Essentially, there is a beam of length L and negligible mass sticking out of a wall with a mass Mg hanging at the end of it. We are given an equation for elastic energy (which I don't think needs to ...
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Potential on a Charged Sheet
I know the field difference across a charged sheet-but what's the potential on a charged sheet? Is it just asymptotic?
If we had a thin cylindrical sheet would it be the same? Zero field inside the ...
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Dominos vs. Conservation of Energy
In this video a single flick of a finger tips 116000 dominos.
Domino video
I understand the work that needs to be done to move 116000 pieces (at least 100 kilos) of plastic is greater then that ...
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overall energy transformation as a diver moves downwards through water [closed]
What is the answer to the following MCQ?
A swimmer dives into a very deep pool at high speed. He slows down as
he moves towards the bottom of the pool. What is the overall energy
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Is electron volt an alternate unit for electric potential? [closed]
My question is: Can an electron volt be considered an alternate unit for electric potential?
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Potential and Kinetic Energy
In engineering school you learn the basic swing problem. Essentially that there is a transfer of kinetic energy (as seen in the velocity at the bottom of as swing) to potential energy at the top of ...
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What is the energy of interaction between a point charge and an infinite cylinder?
I don't remember enough from my electromagnetism course and I can't find any simple, full example on this subject.
I know, that I can consider the cylinder as a wire with the same charge density (...
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What's an "Action" and what does the Lagrangian equation mean exactly?
How and why would a particle take the shortest path?
$L=KE-PE$? What's the $KE-PE$ mean in English?
I understand the 'mechanics' but not the idea itself.
Please explain simply, I do know Calculus ...
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