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#### One-dimensional motion

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#### Two-dimensional motion

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#### Forces and Newton’s laws of motion

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#### Centripetal force and gravitation

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#### Work and energy

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#### Impacts and linear momentum

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#### Torque and angular momentum

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#### Oscillations and mechanical waves

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#### Fluids

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#### Thermodynamics

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#### Electric charge, field, and potential

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#### Circuits

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#### Magnetic forces, magnetic fields, and Faraday’s law

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#### Electromagnetic waves and interference

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#### Geometric optics

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#### Special relativity

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480 Lessons

Introduction to physics

Introduction to physics

Displacement, velocity, and time

Intro to vectors and scalars

Introduction to reference frames

Calculating average velocity or speed

Solving for time

Displacement from time and velocity example

Instantaneous speed and velocity

Position vs. time graphs

Acceleration vs. time graphs

Acceleration

Acceleration

Airbus A380 take-off time

Airbus A380 take-off distance

Why distance is area under velocity-time line

Kinematic formulas and projectile motion

Average velocity for constant acceleration

Acceleration of aircraft carrier take-off

Airbus A380 take-off distance

Deriving displacement as a function of time, acceleration, and initial velocity

Plotting projectile displacement, acceleration, and velocity

Projectile height given time

Deriving max projectile displacement given time

Impact velocity from given height

Viewing g as the value of Earth’s gravitational field near the surface

Choosing kinematic equations

Old videos on projectile motion

Projectile motion (part 1)

Projectile motion (part 2)

Projectile motion (part 3)

Projectile motion (part 4)

Projectile motion (part 5)

Two-dimensional projectile motion

Horizontally launched projectile

Visualizing vectors in 2 dimensions

Projectile at an angle

Launching and landing on different elevations

Total displacement for projectile

Total final velocity for projectile

Correction to total final velocity for projectile

Projectile on an incline

Unit vectors and engineering notation

Unit vector notation

Unit vector notation (part 2)

Projectile motion with ordered set notation

Optimal angle for a projectile

Optimal angle for a projectile part 1: Components of initial velocity

Optimal angle for a projectile part 2: Hangtime

Optimal angle for a projectile part 3: Horizontal distance as a function of angle (and speed)

Optimal angle for a projectile part 4: Finding the optimal angle and distance with a bit of calculus

Newton’s laws of motion

Newton’s first law of motion introduction

More on Newton’s first law of motion

Applying Newton’s first law of motion

Newton’s second law of motion

More on Newton’s second law

Newton’s third law of motion

More on Newton’s third law

Normal force and contact force

Normal force and contact force

Normal force in an elevator

More on Normal force (shoe on floor)

More on Normal force (shoe on wall)

Balanced and unbalanced forces

Balanced and unbalanced forces

Unbalanced forces and motion

Slow sock on Lubricon VI

Slow sock on Lubricon VI

Normal forces on Lubricon VI

Inclined planes and friction

Inclined plane force components

Ice accelerating down an incline

Force of friction keeping the block stationary

Correction to force of friction keeping the block stationary

Force of friction keeping velocity constant

Intuition on static and kinetic friction comparisons

Static and kinetic friction example

Tension

The force of tension

Mild and medium tension

Super hot tension

Introduction to tension

Introduction to tension (part 2)

Tension in an accelerating system and pie in the face

Treating systems (the easy way)

Two masses hanging from a pulley

Three box system problem

Masses on incline system problem

Treating systems

Treating systems (the hard way)

Circular motion and centripetal acceleration

Race cars with constant speed around curve

Centripetal force and acceleration intuition

Visual understanding of centripetal acceleration formula

Optimal turns at Indianapolis Motor Speedway with JR Hildebrand

Calculus proof of centripetal acceleration formula

Loop de loop question

Loop de loop answer part 1

Loop de loop answer part 2

Centripetal forces

Centripetal force problem solving

Yo-yo in vertical circle example

Bowling ball in vertical loop

Mass swinging in a horizontal circle

Newton’s law of gravitation

Introduction to gravity

Mass and weight clarification

Gravity for astronauts in orbit

Would a brick or feather fall faster?

Acceleration due to gravity at the space station

Space station speed in orbit

Introduction to Newton’s law of gravitation

Gravitation (part 2)

Work and energy

Introduction to work and energy

Work and energy (part 2)

Conservation of energy

Work and the work-energy principle

Work as the transfer of energy

Work example problems

Work as area under curve

Thermal energy from friction

Work/energy problem with friction

Conservative forces

Power

Springs and Hooke’s law

Intro to springs and Hooke’s law

Potential energy stored in a spring

Spring potential energy example (mistake in math)

LOL diagrams

Vertical springs and energy conservation

Mechanical advantage

Introduction to mechanical advantage

Mechanical advantage (part 2)

Mechanical advantage (part 3)

Momentum and Impulse

Introduction to momentum

Impulse and momentum dodgeball example

Bouncing fruit collision example

Momentum: Ice skater throws a ball

2-dimensional momentum problem

2-dimensional momentum problem (part 2)

Force vs. time graphs

Elastic and inelastic collisions

Elastic and inelastic collisions

Solving elastic collision problems the hard way

Deriving the shortcut to solve elastic collision problems

How to use the shortcut for solving elastic collisions

Center of mass

Center of mass

Equation for center of mass

Rotational kinematics

Angular motion variables

Relating angular and regular motion variables

Relationship between angular velocity and speed

Rotational kinematic formulas

More on moment of inertia

Rotational kinetic energy

Rolling without slipping problems

Angular momentum

Constant angular momentum when no net torque

Angular momentum of an extended object

Ball hits rod angular momentum example

Cross product and torque

Torque, moments, and angular momentum

Introduction to torque

Moments

Moments (part 2)

Finding torque for angled forces

Rotational version of Newton’s second law

Simple harmonic motion

Intuition about simple harmonic oscillators

Definition of amplitude and period

Equation for simple harmonic oscillators

Period dependence for mass on spring

Phase constant

Pendulums

Simple harmonic motion (with calculus)

Introduction to harmonic motion

Harmonic motion part 2 (calculus)

Harmonic motion part 3 (no calculus)

Introduction to mechanical waves

Introduction to waves

Properties of periodic waves

The equation of a wave

Sound

Production of sound

Sound Properties: Amplitude, period, frequency, wavelength

Speed of Sound

Relative speed of sound in solids, liquids, and gases

Mach numbers

Decibel Scale

Why do sounds get softer?

Ultrasound medical imaging

The Doppler effect

Doppler effect introduction

Doppler effect formula for observed frequency

Doppler effect formula when source is moving away

When the source and the wave move at the same velocity

Doppler effect for a moving observer

Doppler effect: reflection off a moving object

Wave interference

Constructive and Destructive interference

Standing waves on strings

Standing waves in open tubes

Standing waves in open tubes

Standing waves in closed tubes

Beat frequency

Derivation of beat frequency formula

Wave interference

Density and Pressure

Specific gravity

Pressure and Pascal’s principle (part 1)

Pressure and Pascal’s principle (part 2)

Pressure at a depth in a fluid

Finding height of fluid in a barometer

Buoyant Force and Archimedes’ Principle

Archimedes principle and buoyant force

Buoyant force example problems

Fluid Dynamics

Volume flow rate and equation of continuity

Bernoulli’s equation (part 1)

Bernoulli’s equation (part 2)

Bernoulli’s equation (part 3)

Bernoulli’s equation (part 4)

Bernoulli’s example problem

Viscosity and Poiseuille flow

Turbulence at high velocities and Reynold’s number

Venturi effect and Pitot tubes

Surface Tension and Adhesion

Temperature, kinetic theory, and the ideal gas law

Thermodynamics part 1: Molecular theory of gases

Thermodynamics part 2: Ideal gas law

Thermodynamics part 3: Kelvin scale and Ideal gas law example

Thermodynamics part 4: Moles and the ideal gas law

Thermodynamics part 5: Molar ideal gas law problem

Maxwell-Boltzmann distribution

Specific heat and heat transfer

Specific heat and latent heat of fusion and vaporization

Thermal conduction, convection, and radiation

Thermal conduction

Thermal conductivity of metal and wood

Intuition behind formula for thermal conductivity

Laws of thermodynamics

Macrostates and microstates

Quasistatic and reversible processes

First law of thermodynamics / internal energy

More on internal energy

Work from expansion

PV-diagrams and expansion work

Proof: U = (3/2)PV or U = (3/2)nRT

Work done by isothermic process

Carnot cycle and Carnot engine

Proof: Volume ratios in a Carnot cycle

Proof: S (or entropy) is a valid state variable

Thermodynamic entropy definition clarification

Reconciling thermodynamic and state definitions of entropy

Entropy intuition

Maxwell’s demon

More on entropy

Efficiency of a Carnot engine

Carnot efficiency 2: Reversing the cycle

Carnot efficiency 3: Proving that it is the most efficient

Charge and electric force (Coulomb’s law)

Triboelectric effect and charge

Coulomb’s Law

Conductors and insulators

Conservation of charge

Electric field

Electric field definition

Electric field direction

Magnitude of electric field created by a charge

Net electric field from multiple charges in 1D

Net electric field from multiple charges in 2D

Electric field

Proof: Field from infinite plate (part 1)

Proof: Field from infinite plate (part 2)

Electric potential energy, electric potential, and voltage

Electric potential energy

Electric potential energy (part 2– involves calculus)

Voltage

Electric potential energy of charges

Electric potential at a point in space

Electric potential charge configuration

Resistivity and conductivity

Electric power

Kirchhoff’s current law

Kirchhoff’s voltage law

Voltmeters and Ammeters

Electrolytic conductivity

Ohm’s law and circuits with resistors

Introduction to circuits and Ohm’s law

Resistors in series

Resistors in parallel

Example: Analyzing a more complex resistor circuit

Analyzing a resistor circuit with two batteries

Circuits with capacitors

Capacitors and capacitance

Capacitance

Energy of a capacitor

Capacitors in series

Capacitors in parallel

Dielectrics in capacitors

Magnets and Magnetic Force

Introduction to magnetism

Magnetic force on a charge

Cross product 1

Cross product 2

Magnetic force on a proton example (part 1)

Magnetic force on a proton example (part 2)

Magnetic force on a current carrying wire

Magnetic field created by a current

Magnetic field created by a current carrying wire

Magnetic force between two currents going in the same direction

Magnetic force between two currents going in opposite directions

Induced current in a wire

Electric motors

Electric motors (part 1)

Electric motors (part 2)

Electric motors (part 3)

The dot product

Dot vs. cross product

Calculating dot and cross products with unit vector notation

Magnetic flux and Faraday’s law

Flux and magnetic flux

Faraday’s Law Introduction

Lenz’s Law

Faraday’s Law example

Emf induced in rod traveling through magnetic field

Faraday’s Law for generating electricity

Introduction to electromagnetic waves

Electromagnetic waves and the electromagnetic spectrum

Polarization of light, linear and circular

Thin Film Interference part 1

Thin Film Interference part 2

Interference of electromagnetic waves

Constructive and Destructive interference

Young’s double slit introduction

Young’s double slit equation

Young’s double slit problem solving

Diffraction grating

Single slit interference

More on single slit interference

Reflection and refraction

Specular and diffuse reflection

Specular and diffuse reflection 2

Refraction and Snell’s law

Refraction in water

Snell’s law example 1

Snell’s law example 2

Total internal reflection

Dispersion

Mirrors

Virtual image

Parabolic mirrors and real images

Parabolic mirrors 2

Convex parabolic mirrors

Derivation of the mirror equation

Mirror equation example problems

Lenses

Convex lenses

Convex lens examples

Concave lenses

Object image and focal distance relationship (proof of formula)

Object image height and distance relationship

Thin lens equation and problem solving

Multiple lens systems

Diopters, Aberration, and the Human Eye

Michelson and Morley’s luminiferous ether experiment

Light and the luminiferous ether

Potential ways to detect an ether wind

Michelsonâ€“Morley Experiment introduction (Opens a modal)

Minkowski spacetime

Starting to set up a Newtonian pathâ€“time diagram

Visualizing multiple Newtonian pathâ€“time diagrams

Galilean transformation and contradictions with light

Introduction to special relativity and Minkowski spacetime diagrams

Measuring time in meters in Minkowski spacetime

Angle of x’ axis in Minkowski spacetime

Lorentz transformation

Introduction to the Lorentz transformation

Evaluating a Lorentz transformation

Algebraically manipulating Lorentz transformation

Lorentz transformation derivation part 1

Deriving Lorentz transformation part 2

Lorentz transformation derivation part 3

Einstein velocity addition

Lorentz transformation for change in coordinates

Einstein velocity addition formula derivation

Applying Einstein velocity addition

Finding an in-between frame of reference

Calculating neutral velocity

Time dilation

Photon Energy

Photon Momentum

Photoelectric effect

Photons

De Broglie wavelength

Quantum Wavefunction

Atomic Energy Levels

Bohr model radii (derivation using physics)

Bohr model radii

Bohr model energy levels (derivation using physics)

Bohr model energy levels

Absorption and emission

Emission spectrum of hydrogen

Atoms and electrons

Heisenberg uncertainty principle

Quantum numbers

Quantum numbers for the first four shells

Quantum numbers and orbitals

Mass defect and binding energy

Nuclear stability and nuclear equations

Types of decay

Writing nuclear equations for alpha, beta, and gamma decay

Half-life and carbon dating

Half-life plot

Exponential decay formula proof (can skip, involves calculus)

Introduction to exponential decay

More exponential decay examples

Exponential decay and semi-log plots

Nuclei

Discovery of magnetism

Discovery of magnetism

Compass: Which way is north?

Compass build (stroke direction)

Floating magnet

Compass build (magnet orientation)

Neutralize a compass

Compass interactions

Discovery of magnetic fields

Magnet near compass

Tracing a magnetic field

Discovery of magnetic fields

Magnetic permeability

Increase strength of magnet

Measuring magnetic fields

Are 2 magnets stronger than 1?

Earth’s magnetic field (how to measure)

Inverse cube law (deflection method)

Inverse cube law (method of oscillation)

Zinc copper cell (reduction-oxidation)

Battery meter (galvanometer)

Electrolyte test (pure water vs. vinegar)

Reverse electrodes (polarity)

Electrolyte (strong acid test)

Electrolyte (salt test)

Electrode (distance test)

Electrolyte (temperature test)

Electrode (surface area test)

Standard cell

How much electrolyte does a single cell need?

The battery and electromagnetism

Discovery of batteries

Discovery of electromagnetism

Electromagnetic field (above vs. below)

Electromagnetic field (forward vs. reverse)

Electromagnetic field (loop)

Battery meter (galvanometer)

Discovery of electromagnetism

Series load

Pencil resistor

Variable resistor (pencil)

Listen to variable resistance

Discovery of resistors

Electric motor

Spinning compass

Build your own motor

Electrostatics

Discovery of triboelectric effect

Pith ball electroscope

Foil leaf electroscope

Electrostatic telegraphs (case study)

Projectile launcher

Ping pong ball launcher introduction

Build a ping pong ball launcher(Opens a modal)

Update and modify your ping pong ball launcher

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