Why don't we consider internal forces for motion?
79603
Does a car use friction to move?
32338
A Basic Question about Gravity, Inertia or Momentum or something along those lines
144024
Is torque as fundamental a concept as force?
40740
Why force $F$ is $ma$ but not $md$ or $mv$? How can I observe and understand "force" in real life?
33676
Internal and external forces
59321
force applied not on the center of mass
5388
Are Newton's "laws" of motion laws or definitions of force and mass?
134571
Why should a (physical) principle be applicable to different systems in different positions in space and time?
76879
Why don't we consider centrifugal force on a mass placed on earth?
26439
The problem of instant velocity
101257
Intuitive understanding of centripetal vs. centrifugal force
133519
Why do objects move when you apply a force that's equal in magnitude to the friction?
65256
What is the origin of non-conservative force?
66919
When/why does the principle of least action plus boundary conditions not uniquely specify a path?
142081
Can something without mass exert a force?
125082
Why is force a vector?
39041
work done is zero if displacement of point of application of force is zero but why can't we assume forces on COM and its displacement