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Classical Physics Forum

Join expert classical physics discussion on the principles developed before the rise of relativity and quantum mechanics. Including mechanics, electrodynamics, thermodynamics, optics.

Mechanics

I Is calling fictitious forces "not real" just about terminology?

Today, 3:16 AM

Optics

I How do I stretch a laser from a beam into a sheet?

Yesterday, 5:59 AM

Thermodynamics

I What thermal cycle would describe the action of a candle carousel?

Today, 1:51 PM

Electromagnetism

A Reflections at the source point of a transmission line

Oct 31, 2025

Filters

Why does Isotropy of L imply L(v^2)?

Mar 17, 2004 · Replies 3 · Mar 27, 2004

Replies: 3

Views: 3K

Why Is Action Considered a Fundamental Concept in Physics?

Mar 26, 2004 · Replies 1 · Mar 26, 2004

Replies: 1

Views: 3K

Calculating Time for Turntable Platter to Stop at 0rpm

Mar 21, 2004 · Replies 5 · Mar 25, 2004

Replies: 5

Views: 8K

Dir. of field vs. dir. of force, what's up with that?

Mar 24, 2004 · Replies 10 · Mar 25, 2004

Replies: 10

Views: 3K

Central Force Problem: Find Minimum Velocity (k,a,b,m)

Mar 23, 2004 · Replies 11 · Mar 25, 2004

Replies: 11

Views: 8K

Circles in a Box: Forces on Uniform Spheres at 35* Angle in Fixed Container

Mar 22, 2004 · Replies 3 · Mar 23, 2004

Replies: 3

Views: 3K

Program about the birth of the universe

Mar 22, 2004 · Replies 5 · Mar 22, 2004

Replies: 5

Views: 2K

Car A vs Car B 0-100mph Race: Who Wins?

Mar 21, 2004 · Replies 1 · Mar 22, 2004

Replies: 1

Views: 2K

Back emf and battery emf in RL Circuit

Mar 21, 2004 · Replies 1 · Mar 21, 2004

Replies: 1

Views: 9K

Movement on a Sphere: Find Lat & Long of Point P

Mar 14, 2004 · Replies 4 · Mar 17, 2004

Replies: 4

Views: 6K

How fast can a rigid diak spin without disintegrated?

Mar 4, 2004 · Replies 6 · Mar 15, 2004

Replies: 6

Views: 4K

How Do I Calculate Thrust for My Hovercraft Project?

Mar 14, 2004 · Replies 1 · Mar 14, 2004

Replies: 1

Views: 3K

Understanding Focault's Compass - Gyroscope Rotation Dynamics

Mar 12, 2004 · Replies 3 · Mar 14, 2004

Replies: 3

Views: 3K

Definition of Lagrange function

Mar 9, 2004 · Replies 10 · Mar 12, 2004

Replies: 10

Views: 20K

Comments on a discussion please

Mar 10, 2004 · Replies 1 · Mar 11, 2004

Replies: 1

Views: 3K

Landau Series - Reviews and Feedback

Mar 3, 2004 · Replies 1 · Mar 9, 2004

Replies: 1

Views: 4K

Change in Translational KE of a gas

Mar 4, 2004 · Replies 3 · Mar 7, 2004

Replies: 3

Views: 5K

Hey Quick Question: Retaining EM Charge After Conduction?

Mar 2, 2004 · Replies 2 · Mar 5, 2004

Replies: 2

Views: 3K

Sources of gravitational fields

Feb 27, 2004 · Replies 10 · Feb 29, 2004

Replies: 10

Views: 6K

Find the Gravity Center of an Egg: Boaz's Assignment

Feb 26, 2004 · Replies 5 · Feb 28, 2004

Replies: 5

Views: 9K

What is Energy? Heat & Kinetic Energy

Feb 26, 2004 · Replies 4 · Feb 28, 2004

Replies: 4

Views: 3K

Poll

How Does Weight Affect the Stretch Length of Rubber Bands?

Dec 10, 2003 · Replies 21 · Feb 26, 2004

Replies: 21

Views: 7K

Total energy through a Young experiment

Feb 21, 2004 · Replies 2 · Feb 26, 2004

Replies: 2

Views: 3K

What is the Infinitesimal Duration of Now?

Feb 16, 2004 · Replies 8 · Feb 25, 2004

Replies: 8

Views: 3K

Questions about Universal Gravitation

Feb 10, 2004 · Replies 5 · Feb 24, 2004

Replies: 5

Views: 2K

Solving sec^-1 in Horizontal Displacement Equation

Feb 21, 2004 · Replies 6 · Feb 23, 2004

Replies: 6

Views: 10K

Simplifying Equations of Motion for a Bead Sliding on a Parabolic Wire

Feb 22, 2004 · Replies 5 · Feb 23, 2004

Replies: 5

Views: 8K

Question: Volume occupied by 10% alcohol, 20%, 30%, 40%

Feb 21, 2004 · Replies 8 · Feb 23, 2004

Replies: 8

Views: 5K

HS Cu vs Alu: Which is Best for Performance?

Feb 20, 2004 · Replies 11 · Feb 22, 2004

Replies: 11

Views: 3K

Electric Field: Other than Middle & Infinity?

Feb 20, 2004 · Replies 1 · Feb 20, 2004

Replies: 1

Views: 2K

Does Shaft Flex Affect Distance in Golf Swings?

Feb 14, 2004 · Replies 3 · Feb 15, 2004

Replies: 3

Views: 5K

Understanding Newton's Second Law for Rockets: F=dp/dt Explained

Feb 10, 2004 · Replies 6 · Feb 15, 2004

Replies: 6

Views: 24K

Hamiltonian and Lagrangian Mechanics: Online Resource

Feb 14, 2004 · Replies 2 · Feb 14, 2004

Replies: 2

Views: 3K

Kinetic Energy of Ball Thrown by Woman on Train

Feb 11, 2004 · Replies 4 · Feb 12, 2004

Replies: 4

Views: 9K

How can I solve for W in this tricky statics problem without exceeding 1050N?

Feb 11, 2004 · Replies 3 · Feb 11, 2004

Replies: 3

Views: 2K

Virtual Displacement: Analyzing Langrange Equations

Feb 9, 2004 · Replies 1 · Feb 10, 2004

Replies: 1

Views: 6K

Set up an infinite row of dominos and knock over the first one

Dec 10, 2003 · Replies 5 · Feb 7, 2004

Replies: 5

Views: 9K

Can a Positive Charge be in Stable Equilibrium in the Center of a Square According to Earnshaw's Theorem?

Feb 7, 2004 · Replies 1 · Feb 7, 2004

Replies: 1

Views: 6K

What happens to moisture when air compressed?

Feb 5, 2004 · Replies 4 · Feb 6, 2004

Replies: 4

Views: 20K

K-Delta Function in Autocorrelation of Gaussian White Noise

Feb 5, 2004 · Replies 2 · Feb 6, 2004

Replies: 2

Views: 4K

Levitating Carbon Arrow with Magnets

Feb 5, 2004 · Replies 1 · Feb 5, 2004

Replies: 1

Views: 3K

Can a Gravity Machine Harness Energy in a Frictionless Universe?

Feb 3, 2004 · Replies 9 · Feb 5, 2004

Replies: 9

Views: 5K

Bubble Physics: Modeling and Scripting for Realistic Bubbles

Feb 4, 2004 · Replies 1 · Feb 4, 2004

Replies: 1

Views: 3K

Please recommend physics REVIEW book

Feb 2, 2004 · Replies 1 · Feb 3, 2004

Replies: 1

Views: 5K

If a rock is dropped off a sea cliff

Oct 6, 2003 · Replies 14 · Feb 2, 2004

Replies: 14

Views: 4K

What is the principle behind my homemade railgun?

Jan 29, 2004 · Replies 2 · Jan 29, 2004

Replies: 2

Views: 4K

Effects of a Vacuum: What Happens if Exposed?

Oct 3, 2003 · Replies 8 · Jan 26, 2004

Replies: 8

Views: 3K

Do center of mass and weight play a role in the difficulty of pull-ups?

Oct 8, 2003 · Replies 28 · Jan 25, 2004

Replies: 28

Views: 15K

Clarifying Latent Heat: Cooling 1kg of Water to 0C?

Jan 24, 2004 · Replies 6 · Jan 25, 2004

Replies: 6

Views: 3K

What are the properties of fire?

Jan 18, 2004 · Replies 21 · Jan 25, 2004

Replies: 21

Views: 15K

Yoyo Calculation: Derive Rotational Kinetic Energy

Jan 21, 2004 · Replies 9 · Jan 24, 2004

Replies: 9

Views: 8K

Horse and Lance Momentum and Energy

Jan 13, 2004 · Replies 4 · Jan 21, 2004

Replies: 4

Views: 7K

Force required to slash through chain or steel mail

Jan 20, 2004 · Replies 3 · Jan 21, 2004

Replies: 3

Views: 4K

What Happens to the Force at Gear Gang Limit?

Jan 11, 2004 · Replies 3 · Jan 19, 2004

Replies: 3

Views: 4K

Mystery of the Rising Solid: Energy Flows Explained

Jan 15, 2004 · Replies 11 · Jan 16, 2004

Replies: 11

Views: 4K

How does hoarfrost form in the morning?

Jan 8, 2004 · Replies 3 · Jan 14, 2004

Replies: 3

Views: 2K

Help Needed on Solar Energy Conversion Project Due Tuesday

Jan 11, 2004 · Replies 3 · Jan 12, 2004

Replies: 3

Views: 3K

Buoyancy Puzzler - just for fun

Dec 24, 2003 · Replies 9 · Jan 7, 2004

Replies: 9

Views: 4K

Angle of Balance with Unequal Weights: Equation?

Jan 2, 2004 · Replies 10 · Jan 5, 2004

Replies: 10

Views: 7K

A very quick query about strain gauges

Jan 3, 2004 · Replies 1 · Jan 4, 2004

Replies: 1

Views: 3K

What is the solution to the classical string problem?

Jan 3, 2004 · Replies 3 · Jan 3, 2004

Replies: 3

Views: 3K

Helping You Solve Cambridge's Exam Question

Jan 2, 2004 · Replies 9 · Jan 2, 2004

Replies: 9

Views: 4K

Can an Object in Motion Remain Moving with Balanced Forces?

Jan 2, 2004 · Replies 1 · Jan 2, 2004

Replies: 1

Views: 4K

Solving Newton's Gravity Equation: Acceleration & Masses

Dec 27, 2003 · Replies 12 · Dec 29, 2003

Replies: 12

Views: 6K

Bicycle Tire Question: Why Does Air Loss Affect Cycling Difficulty?

Dec 24, 2003 · Replies 9 · Dec 27, 2003

Replies: 9

Views: 5K

Wave-particle duality and the role of observation in determining locality

Dec 16, 2003 · Replies 10 · Dec 26, 2003

Replies: 10

Views: 7K

How Do OS and NS Drumming Techniques Differ in Terms of Physics?

Dec 22, 2003 · Replies 7 · Dec 24, 2003

Replies: 7

Views: 7K

Finding the Center of Mass of a Uniform Semicircular Disk Using Integration

Dec 17, 2003 · Replies 8 · Dec 21, 2003

Replies: 8

Views: 14K

Can the Dot Product of Electric and Magnetic Fields be Proven as Invariant?

Dec 5, 2003 · Replies 108 · Dec 13, 2003

4

Replies: 108

Views: 23K

Relativistic Invariance Part Two

Dec 9, 2003 · Replies 1 · Dec 10, 2003

Replies: 1

Views: 3K

What is the initial kinetic energy of a point charge traveling at velocity v?

Dec 3, 2003 · Replies 2 · Dec 7, 2003

Replies: 2

Views: 6K

Why Do Objects Fall Slower on the Moon?

Dec 6, 2003 · Replies 1 · Dec 6, 2003

Replies: 1

Views: 4K

Calculating how fast a wheel turns

Dec 4, 2003 · Replies 2 · Dec 5, 2003

Replies: 2

Views: 7K

Questioning logic used for highschool rocket propulsion problem

Dec 3, 2003 · Replies 4 · Dec 4, 2003

Replies: 4

Views: 4K

What is the most accurate way to measure pushing force for a trolley on wheels?

Dec 1, 2003 · Replies 5 · Dec 1, 2003

Replies: 5

Views: 18K

What is the More Accurate Value for G?

Nov 30, 2003 · Replies 1 · Nov 30, 2003

Replies: 1

Views: 7K

What Length of Bungee Cord is Needed to Stop a 70 kg Person from Plunging 226m?

Nov 20, 2003 · Replies 1 · Nov 21, 2003

Replies: 1

Views: 9K

How to Prove AI = AT + AR for Wave Amplitudes?

Nov 17, 2003 · Replies 1 · Nov 18, 2003

Replies: 1

Views: 3K

Solving the Motion Equation of a Projectile

Nov 13, 2003 · Replies 2 · Nov 13, 2003

Replies: 2

Views: 4K

Maximizing Air Ionization with Corona Discharge Emitters

Nov 3, 2003 · Replies 2 · Nov 9, 2003

Replies: 2

Views: 4K

Can anyone explain the relationship between t²-x² in relativity theory?

Nov 7, 2003 · Replies 3 · Nov 8, 2003

Replies: 3

Views: 6K

G Forces 101: Understanding and Estimating the Impact on Moving Bodies

Nov 6, 2003 · Replies 5 · Nov 7, 2003

Replies: 5

Views: 4K

How much mass does the sun add to the earth each day?

Nov 3, 2003 · Replies 8 · Nov 6, 2003

Replies: 8

Views: 9K

Does Sitting in Glass Alter Your Perception of Time Due to Light Speed?

Nov 4, 2003 · Replies 1 · Nov 4, 2003

Replies: 1

Views: 4K

Laplace-Runge-Lenz vector and its generating transformation

Nov 2, 2003 · Replies 2 · Nov 3, 2003

Replies: 2

Views: 7K

Calculating Resonant Frequency of Water in a Cylindrical Pipe

Oct 29, 2003 · Replies 7 · Oct 30, 2003

Replies: 7

Views: 6K

Why Are Formula One Tyres So Big?

Oct 27, 2003 · Replies 2 · Oct 28, 2003

Replies: 2

Views: 5K

Benouilli Effect: How Airplanes and Paper Fly

Oct 18, 2003 · Replies 40 · Oct 27, 2003

2

Replies: 40

Views: 14K

Equilibrium of a Homogeneous Dice on Horizontal Rods: Finding the Critical Angle

Oct 24, 2003 · Replies 2 · Oct 25, 2003

Replies: 2

Views: 5K

What Causes the Weakening of Magnetic Strength When Two Magnets are Joined?

Oct 21, 2003 · Replies 6 · Oct 22, 2003

Replies: 6

Views: 5K

What are the solutions to these 3 physics problems?

Oct 19, 2003 · Replies 5 · Oct 19, 2003

Replies: 5

Views: 9K

Pushing a 6kg Pic Against a Wall: Find the Force Needed

Oct 18, 2003 · Replies 2 · Oct 19, 2003

Replies: 2

Views: 4K

Why Don't Electrons Spiral into Protons Despite Their Attraction?

Oct 5, 2003 · Replies 16 · Oct 17, 2003

Replies: 16

Views: 8K

What Causes the Egg-Water Phenomenon?

Oct 12, 2003 · Replies 6 · Oct 15, 2003

Replies: 6

Views: 9K

Energy of an Infinitely Rigid Object Impacting a Wall

Oct 11, 2003 · Replies 8 · Oct 12, 2003

Replies: 8

Views: 7K

Understanding the Science of 'Sync' : Cornell Daily Sun

Sep 16, 2003 · Replies 5 · Sep 18, 2003

Replies: 5

Views: 6K

Classical Physics

Welcome to the Classical Physics forum!

Classical physics refers to the traditional theories and principles of physics developed before the advent of quantum mechanics and relativity in the early 20th century. It includes classical mechanics, electromagnetism, and thermodynamics.

Classical mechanics, formulated by Newton, describes the motion of objects and the forces acting upon them. Maxwell's equations encompass classical electromagnetism, elucidating the behavior of electric and magnetic fields. Thermodynamics, developed by Carnot and others, focuses on the principles governing heat, work, and energy transfer in macroscopic systems.

While highly successful in explaining everyday phenomena, classical physics encountered limitations at extreme scales, leading to the development of quantum mechanics and relativity to describe the behavior of particles at the atomic and cosmic levels, respectively.

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