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How to analyze 1D forced oscillations in a string that is attached to a small body that can slide up and down a pole? What if the body is attached to a spring with spring constant of k? What i'm ...
Darius Otincelescu's user avatar
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I have some problems interpretating the results from a standard exercise given in a many-body physics course. I have a one electron retarded Green's function of a system of interacting fermions $$ G_{...
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Originally, I thought that the sea salt water would naturally influence a faster melting period. However, when I conducted this experiment, that is not what occurred. I started with two clear cups of ...
Haylee Barnes's user avatar
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[In the above problem, i tried solving and got the acceleration of block to be 6m/s². I thought there's a net 30 Newton force that will immediately start pulling the block forward and eventually ...
Inter-Loop's user avatar
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Exercise 7.25 in Freedman & Van Proeyen's Supergravity is the following Show that $D_\mu \Psi$ also transforms as a spinor, namely into $\exp(− 1/4 \lambda^{ab}(x)\gamma_{ab}) D_\mu \Psi(x)$. You ...
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I am doing a mechanics question, relating to a fairly complex pulley system, in which all pulleys involved are smooth. A has a mass $5m$, B has a mass $3m$. P is a frictionless pulley, with a mass $M$....
Orange Splicer's user avatar
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2 answers
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In the following image, I was wondering how could one calculate the equivalent resistor across A and B. Let's call that $R_{ab}$. My confusion is how would I deal with the $R_{9}$ and $R_{10}$ ...
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2 answers
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I'm having trouble solving problems like this. Which actual fundamental concepts should I review again, and which types of problems should I practice again?
Thats BlackidoZ's user avatar
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4 votes
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First a ball gets an impulse $J$. Why can we say that $$Jh = I_cm w,$$ when it is clear that the friction force is also acting around the CM of the ball. When balacing forces around the CM we see that ...
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TL,DR:When should we exclude element considered while trying to compute force on itself due one half of a system ,and when not to? Say we are required to find the force acting on two vertically cut ...
A James's user avatar
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I'm a current AP Physics 2 high school student with a test in a few days; a swift reply would be very much appreciated. Thank you in advance. My question is concerning the formula for the change in ...
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I am studying the Effective Field Theory for extended objects proposed by Goldberger and Rothstein. This theory studies a binary system in inspiral phase. By means of the virial theorem we get a ...
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2 answers
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If you plot a graph showing the variance of electric potential between two charges, does the middle have a maximum or minimum electric potential and why?
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Problem statement: A block of mass m and a cylinder of mass $2m$ are released on a rough inclined plane. The plane is inclined at an angle $θ=45$ degrees with the horizontal. The coefficient of ...
Raman Medatiya's user avatar
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I was talking with a prof about loop de loop problems and how they where usually solved in terms of energy when they mention that they could maybe be solves in terms of kinematics but that they’d ...
Cat's user avatar
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