According to Newton's Second Law, why is $F = \Delta p/\Delta t$ rather than just $F \propto Δp / Δt$?
1394
How do we know that $F = ma$, not $F = k \cdot ma$
90325
Why use the derivative and not the symmetric derivative?
48756
Why are derivatives in interaction terms treated differently from derivatives in the kinetic term?
85183
If velocity is constant, how can $p = F\cdot v$ be non zero?
65039
What is the reason of $dT/dh = 0$ in the gas column?
62022
Why is velocity of the mass $v/ \cos θ $? Why not $2v \cos θ$?
93588
Based on newtons third law
18054
Is there a proof from the first principle that the Lagrangian L = T - V?
28035
How is Liouville's theorem compatible with the Second Law?
885
Why is the 2nd derivative written as $\frac{\mathrm d^2y}{\mathrm dx^2}$?
21671
How did Newton discover his second law?
36490
Why is Newton's first law necessary?
62359
Contradiction between law of conservation of energy and law of conservation of momentum?
42484
History of interpretation of Newton's first law
93539
Why is $M\frac{dv}{dt} = v_{rel} .\frac{dm}{dt}$ correct and $(M - dm)\frac{dv}{dt} = v_{rel} .\frac{dm}{dt}$ wrong?
109364
What exactly is the difference between a derivative and a total derivative?
114672
Why do we use the Lagrangian and Hamiltonian instead of other related functions?