All Questions
Tagged with conservation-laws momentum
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Idealized Newton's cradle
I was wondering about the conditions for an ideal newtons cradle.
Under regular circumstances, the collisions are inelastic and a newton's cradle dissipates energy in various forms like heat, friction,...
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Apparent violation of Newton's Third Law in relativistic force transformation
In special relativity, we know that, relativistic force is defined as F = dp/dt, where p = γmv.
For forces perpendicular to the direction of relative motion, force transforms as F' = γF.
Consider two ...
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Noether's theorem by a taste of logic [closed]
I am a mathematician and I asked this question briefly and my question became closed, may be - I don't know - because physicists don't used to apply the method of "proof by contradiction". ...
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How do you solve instantaneous 3 body collisions
A few years ago I built myself a very basic python program that did some very basic collision mechanics between particles with a mass and velocity and it was helpful in learning a few things and ...
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Could we deduce energy, momentum and angular momentum conservation laws from only Galilean relativity?
In Newtonian physics we could deduce conservation of energy, momentum and angular momentum from Newton's three laws.
But by Noether's theorem, conservation laws could be deduced from symmetries.
Could ...
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Kinematics of a two-body decay [closed]
I suspect a flaw in the reasoning below, but am unable to pinpoint it: Is there something inconsistent in terms of the application of conservation of momentum and energy? Thanks for any hints in ...
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Do bodies stick together after an inelastic oblique collision?
My question is particularly about an oblique collision case. (For example a body having velocity along x axis approaching another with velocity along y axis) From what I know, in perfectly inelastic ...
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Does moving the idler in a wheel and disk CVT conserve energy or momentum? [closed]
Consider the wheel and disk CVTs (continuous variable transmissions) below. Configuration A comprises a CVT disk coupled to the "system under control" 's', whereby a control wheel 'cw' ...
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Generalized momentum
I am studying Hamiltonian Mechanics and I was questioning about some laws of conservation:
in an isolate system, the Lagrangian $\mathcal{L}=\mathcal{L}(q,\dot q)$ is a function of the generalized ...
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Confusion in conservation of momentum [closed]
Two masses $m_1$ and $m_2$ are attached to the two ends of a rope that is sent through a pulley. Then a mass $M$ is dropped onto the mass $m_1$ from a $h$ height. So when the law of conservation of ...
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A car collides with a fast-moving bus, which vehicle experiences the greater change in momentum? [closed]
$\textbf{My question:}$
A car collides with a fast-moving bus, which vehicle experiences the greater change in momentum?
But when I googled I got conflicting answers from "expert answers": ...
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Conservation of $y$ component of momentum
Rain with mass $mr$, falling vertically downwards at speed $v$, into a truck of mass $mt$, moving on a horizontal surface at speed $u$ inital, ignoring friction and air resistance. Taking the system ...
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"Momentum" of spinning disc from collision -- conserving momentum of input momentum?
I have an application for which I have concluded a collision lets conserve momentum.
Examples of the type of scenario in which I believe my conclusion applies:
a waterwheel blade hit by a ball (wheel ...
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Im confused on how conservation of momentum works mathematically for a problem involving a skater throwing two weights from rest [closed]
Here's the question.
A 40-kg skateboarder on a 3-kg board is training with two 5-kg weights. Beginning from rest, she throws the weights horizontally, one at a time from her board. The speed of each ...
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Energy conservation in alpha particle induced nuclear reaction
Regarding the alpha particle induced nuclear reaction- $${}^{16}_7N+{}^{4}_2He--->{}^{1}_1H+ {}^{19}_8O $$ The alpha particle collides with stationary Nitrogen isotope to give the following ...
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