Newton's 2nd Law: Why is this Mass times Acceleration?
137520
How force is mass times acceleration?
51097
Newton's third law and General relativity
31837
Why does Newton's Third Law actually work?
32338
A Basic Question about Gravity, Inertia or Momentum or something along those lines
28940
Why does Newton's third law exist even in non-inertial reference frames?
15425
Equivalence principle question
29389
Why does $k/m=\omega^2$ for harmonic motion?
101294
For a massless pulley moving upwards with acceleration, is the upward force equal to the downward force?
12818
In calculating work done by a constant force over a constant distance, why doesn't the subject's initial velocity matter?
39282
The Time That 2 Masses Will Collide Due To Newtonian Gravity
82362
Is there a fundamental reason why gravitational mass is the same as inertial mass?
5059
Singularity in Newton's gravitational law
33271
Two bodies of finite size treated as two point masses in Newtonian gravity
35331
How can an object's instantaneous speed be zero and it's instantaneous acceleration be nonzero?
127519
How is momentum conserved in this example?
125883
Moment of inertia: why $\mathrm{dI}=r^2\mathrm{dm}$ instead of $\mathrm{dI}=m\mathrm{dr^2}$?
144615
How much work can a force on a spring do? (Why are two methods wrong?)