Why Is Newton's second law $F=ma$, and how did Newton "Discover it"?
21671
How did Newton discover his second law?
148029
What if Force was not Mass times Acceleration?
28940
Why does Newton's third law exist even in non-inertial reference frames?
53798
The relation between acceleration and inertial force
76557
Is there an intuitive explanation for why Lorentz force is perpendicular to a particle's velocity and the magnetic field?
113804
Why does $F=ma$? Is there a straightforward reason?
107319
$F=ma$ contest problem on angular momentum
74367
Newtonian mechanics: massless particles
61540
Why is current a scalar quantity?
885
Why is the 2nd derivative written as $\frac{\mathrm d^2y}{\mathrm dx^2}$?
73310
Why is the equation for friction so simple?
111394
Does conservation of momentum really imply Newton's third law?
155774
How does Newton's first law asserts the existence of inertial frames?
29389
Why does $k/m=\omega^2$ for harmonic motion?
113516
Why can we only add or subtract things of the same dimension (meters/second, newtons, etc)?
145468
Why do we say that in Coulomb's law the force is proportional to $\frac{1}{r^{2}}$ and not $\frac{1}{r^{3}}$?
67845
How was the torque-force relationship discovered