Classical Physics Forum

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

Mechanics

High School Mousetrap Car Energy efficiency

Optics

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

Thermodynamics

High School Using battery energy to heat a battery…

Electromagnetism

Undergrad What determines if wave components are independent vs coherent?
Undergrad How does our brain differentiate between a source of light and a painted circle?
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High School Consequences of a 1 Tesla magnetic field coming into the proximity of Earth?
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Understanding Stress and Strain: The Relationship Between Two Variables
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Undergrad Do objects of different mass but same size/shape accelerate the same?
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High School Problem with understanding deriving Torricelli's law
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Undergrad How Feynman proves momentum is conserved in this example?
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Undergrad How does a free surface flow cause non-linearity?
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High School Confused about this force calulation in Resnick Halliday Krane Electrostatics
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High School Why Is Universal Attraction Used If Galaxies Accelerate Apart?
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Undergrad Can Ultrasound Be Used to Penetrate Through Air and Bone?
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Undergrad Marble spiralling inside a cylinder- New video
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Undergrad Sign of the spatial part of the J.J interaction
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High School Finding the spring constant of a rope
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High School Which equation should be used to calculate impulse: I=F(t) or I=m1v1-m0v0?
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High School Superposed loads (gunpowder and bullets) igniting simultaneously in a barrel
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High School Launch of a rocket - its initial displacement and velocity
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Undergrad How fast does a blastwave travel?
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Undergrad Atmospheric Density vs Altitude in an O'Neil Cylinder
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Undergrad Prevent a robotic cleaner from climbing on a block of iron with a magnet?
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High School Help Scaling Gravity Simulation
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Undergrad Understanding Ultrasound Blocking: Effects on Energy, Reflection, and Absorption
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High School Elevator Question -- What does a downward acceleration mean?
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High School Non-Sinusoidal Standing Waves Existence?
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Undergrad Question about an interesting experiment video (two magnetic balls in tubes)
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Undergrad An ID-card sliding on a low friction table
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Undergrad Why is estimation of ##\frac{Pv}{RT}=1+BP+CP^2+...## interesting?
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Undergrad Where are the limits being taken in these thermodynamics equations?
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Undergrad Mapertius's Principle and 2nd Newton's law
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Undergrad How to measure average thermal conductivity of a metallic material?
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Undergrad Measuring change of magnetic field strengh over distance
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Undergrad Can EM waves stimulate neurons?
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High School Does the Electric Field Change When One Charge Moves Relative to Another?
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Undergrad Active transformation use-case in homogeneity
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High School Extracting electrical energy from Orbital motion
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Undergrad The electric field due to a dipole
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Undergrad Physical Meaning of the Imaginary Part of a Wave Function
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Undergrad Gravity machine force calculations assistance needed
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Undergrad Why normal force is not equal to gravity?
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Undergrad Does the Skin Effect cause charge to accumulate on the surface of a conductor?
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Undergrad Interesting sound-making hydrogen-burning device
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Undergrad Fluid dynamics: drag coefficient and pressure at the stagnation point.
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Undergrad Transformations for isotropy in terms of math
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Undergrad Coordinate transformation for isotropy
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History - Evolution of ideas in the field of thermodynamics (statistics in mechanical and gas dynamics)
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Undergrad How find moment of inertia for car in turn?
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Undergrad Results of measurement using a magnetic sensor
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Undergrad About the use of nominal definitions in physics
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Undergrad How to understand experiment to measure heat capacity of solid?
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High School Pumping water upwards into a large water tank
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High School Can Jupiter gravitationally eject a pebble in orbit? A smaller mass?
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Undergrad Spring balance analysis from a system point of view
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Undergrad Different Equations of Motion for different frames
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High School Fluid Flow Deflection Bending Ahead of Airfoil?
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Undergrad Measuring difference in Exercising in a Flat Surface vs one with Slope
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Undergrad Inertia/Non-inertial frame - isotropy
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Crosswind problem (pgs. 34-35, Thinking Physics, 3rd edition)
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Graduate Magnetic bound state in classical mechanics
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Undergrad Physics of car understeer and oversteer
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High School Where does the 1/2 in 1/2 at^2 come from?
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High School Applying Bernoulli's equation to problems involving a perfect gas
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Undergrad Pressure: Sealed bottle physics
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Undergrad Do objects always rotate around center of mass?
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Graduate Lagrangian: kinetic matrix Z_ij and mass matrix k_ij
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Undergrad Work in hydrostatic system in cylinder with piston: P_int or P_ext?
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High School Can electrons pass through a positively charged disc in electrostatic induction?
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Undergrad Effects of gravity on planetary core structure
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Undergrad Systems and number of FBDs....
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High School Proof of the relation between antenna aperture and gain
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High School Am I attracted to a hydrogen atom 1 billion light years away?
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Undergrad Is it accurate to say work is motion against an opposing force?
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Graduate Upper indices and lower indices in Einstein notation
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Undergrad Empirical temperature scales using different thermometers
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Undergrad Constant length metallic wire as a thermometer, using tension?
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Undergrad How Does Temperature Affect Wire Tension at Constant Length?
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High School A contradiction of the equivalence principle?
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Undergrad Writing the Lagrangians for different frames depending on how "the ball is dropped"
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Graduate Why the James Webb Space Telescope needs propellant
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Undergrad Does being surrounded by water affect collisions between 2 bodies?
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Undergrad Deriving formula for kinetic energy
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Undergrad An interesting question about another view of baisc mechanics'laws
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High School Why don't two double pendulum apparatus follow the same paths? / Chaos
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Undergrad Analog TV reception in a spacecraft moving relative to the Earth
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High School Estimate the difficulty of a mountain route
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Undergrad A Continuous Solution for Mass/Spring w/ Friction
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High School Calculating g with a Conical Pendulum
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Undergrad Melting point of graphite and diamond?
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Undergrad What is the distinction between invariance and covariance?
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Graduate Are there real-world applications of Hamilton's Principle in mechanics?
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Undergrad Question about driven harmonic oscillator
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High School Why is potential difference the same across each branch in parallel?
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Undergrad Alternatives to the Lagrangian?
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Undergrad Doubts about isotropy of space
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Undergrad Open problems in nonlinear dynamics and Chaos
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Undergrad Gyroscopic precession of a spin-stabilized bullet
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High School Question about Euler's formula
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Undergrad Working model to demonstrate Lagrange points L4 & L5 -- possible?
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Undergrad How is this the same as this? (two kinds of waves)
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Undergrad Lagrangian total time derivative for the velocity
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Undergrad Why does resistance reduce current in whole circuit?
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Undergrad Calculating Combined Loading Stress: Neutral Axis and Bending Moment at Point A
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