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Knowledge / Physics

Classical Mechanics

Motion, forces, momentum, energy, angular momentum, oscillations, and the dynamics of physical bodies.

By Siddhant Krishna · Published 2026-10-06 · Updated 2026-10-06

01

Kinematics

Kinematics describes position, velocity, and acceleration without requiring an explanation of the forces producing motion.

v = dx/dt
a = dv/dt = d²x/dt²

02

Newton's Laws

Newtonian mechanics relates the motion of bodies to applied forces.

F = ma
  • Inertia describes the tendency of objects to maintain their state of motion.
  • Acceleration is produced by net force.
  • Forces between interacting bodies occur in paired interactions.

03

Energy

K = 1/2 mv²
U = mgh

Energy methods often simplify mechanics by replacing explicit force calculations with relations between initial and final states.

04

Momentum

p = mv

Momentum is conserved in isolated systems. Momentum methods are particularly useful for collisions, propulsion, and systems involving mass transfer.

References

  1. OpenStax, University Physics Volumes 1–3, peer-reviewed university-level physics texts.
    https://openstax.org/details/books/university-physics-volume-1
  2. Feynman, Leighton & Sands, California Institute of Technology.
    https://www.feynmanlectures.caltech.edu/

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