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0 votes
1 answer
69 views

Rigorous treatment for continuous mass systems

I would like to ask if anyone knows an accessible, yet rigorous way of passing from a discrete system of mass-points to a continuous mass system. For instance, we clearly know how to define the ...
Matteo Menghini's user avatar
5 votes
4 answers
924 views

Partial derivative in Newtons Second law

Newton's second law states Force is the time derivative of momentum. But is it a total derivative or partial derivative? What is the reason behind it?
I am Me's user avatar
  • 53
1 vote
1 answer
78 views

What is $\dfrac{\partial x}{\partial t}$ in a progressive wave?

I actually divided the velocity of a particle in a progressive wave $\dfrac{\partial y}{\partial t}$ to $\dfrac{\partial y}{\partial x}$ and got $\dfrac{\partial x}{\partial t}$. Which is equal to $\...
Neerav Singla's user avatar
1 vote
2 answers
144 views

Work done as change of potential, how total derivative is converted to partial derivative

I am reading Goldsetein's Classic Mechanics 3rd edition in Chapter 1 it says, If work done in moving form point 1 to 2 denoted by $W_{12}$, is independent of the path it should be possible to ...
ngbtwby's user avatar
  • 113