Topic Cluster

Classical Mechanics

Classical mechanics: forces, energy, momentum and motion — Newton’s laws, work and energy, collisions, rotation and the everyday mechanics the rest of physics is built on.

What Is Classical Mechanics?

Classical Mechanics is the physics of why motion changes: the forces, energy and momentum that govern everything from a rolling ball to an orbiting satellite. Everything else in physics leans on it.

Core equations in classical mechanics
Relationship	Equation	What it tells you
Newton's second law	F = m·a	Net force, mass and acceleration
Work done	W = F·d·cosθ	Energy transferred by a force
Kinetic energy	KE = ½·m·v²	Energy of a moving mass
Gravitational PE	PE = m·g·h	Energy stored by height
Momentum	p = m·v	Conserved in every collision
Torque	τ = r·F·sinθ	Turning effect of a force

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Classical Mechanics

Inclined Plane Physics: How to Solve Ramp Problems

Inclined plane physics splits an object's weight into mg sinθ down the slope and mg cosθ into the surface. Here is the 5-step method, plus 8 worked ramp problems.

19 min read

Classical Mechanics

Physics Formulas: The Complete Cheat Sheet

A complete physics formula cheat sheet: every core equation grouped into ten branches, with each symbol and its SI unit defined, plus worked examples and the constants that go with them.

24 min read

Classical Mechanics

Circular Motion Physics: Formula, Examples & Uses

Circular motion physics explains why an object moving in a circle at constant speed is still accelerating: its direction changes every instant. This guide covers the a = v²/r formula, five real examples, four common misconceptions and seven worked problems.

13 min read

Classical Mechanics

Mechanical Advantage and Simple Machines

Mechanical advantage is the load force divided by the effort force — the number of times a machine multiplies what you push with. This guide covers the formula, ideal vs actual MA, all six simple machines, and eight worked problems.

16 min read

Classical Mechanics

What Is the Center of Gravity in Physics?

The center of gravity is the single point where an object's whole weight acts. Learn the formula, how to find it, and why things balance or topple — with worked examples.

17 min read

Classical Mechanics

Moment of a Force (Turning Effect)

The moment of a force is the turning effect it produces about a pivot, found by multiplying force by perpendicular distance (M = F × d). Learn the formula, the principle of moments and the classic distance mistake — with eight worked examples.

15 min read

Classical Mechanics

What Is Equilibrium in Physics?

Equilibrium in physics is the balanced state where the net force and net torque on an object are both zero, so it stays at rest or moves at constant velocity. This guide covers the two conditions (ΣF = 0 and Στ = 0), static vs dynamic equilibrium, the types of equilibrium, worked examples and FAQs.

14 min read

Classical Mechanics

What Are the Types of Forces in Physics?

A clear guide to the types of forces in physics — contact forces like friction and tension, non-contact forces like gravity, and the four fundamental forces — with the F = ma formula and worked examples.

15 min read

Classical Mechanics

What Is Elastic Potential Energy?

Elastic potential energy is the energy stored when a spring or elastic object is stretched or compressed, given by EPE = ½kx². This guide explains the formula, why energy grows with the square of the stretch, and how to use it, with worked examples.

13 min read

Classical Mechanics

What Is Torque in Physics?

Torque is the turning effect of a force, given by τ = rF sinθ. This guide explains the formula, why the angle matters, real-world examples and worked problems.

13 min read

Classical Mechanics

Weight vs Mass: What’s the Difference?

Mass is the amount of matter in an object (measured in kilograms); weight is the force of gravity on it (measured in newtons). This guide explains the difference, the W = mg formula, and how your weight changes across the solar system while your mass stays the same.

12 min read

Classical Mechanics

What Is Power in Physics?

Power in physics is the rate at which work is done, P = W/t = Fv, measured in watts. This guide explains the formula, average vs instantaneous power, real-world examples, and seven worked problems.

11 min read

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