Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
What is the Electric Field at Point P Due to a Uniformly Charged Rod?
  • glennpagano44
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Due in 10 MINUTES (Easy) (Yes/No)
  • FAJISTE
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Due in 10 Minutes PART TWO (Two balls dropping from roof) True/False
  • FAJISTE
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Scales- Weight on a scale in an elevator (True/False) Quick
  • FAJISTE
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Electric fields caused by multiple charges
  • lacar213
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Finding Final Velocities in a Two-Dimensional Collision
  • wesDOT
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Solving Force and Vector Problems: Tips and Examples
  • elitespart
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Circuit Analysis: Voltage Direction & Power Questions
  • Air
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Two-State Paramagnet: 10^23 Elementary Dipoles, Zero Energy
  • Vuldoraq
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Which electromagnetic waves travel the fastest in a vacuum?
  • stickplot
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Force exerted by an external electric field
  • lacar213
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Distance Traveled Homework: Solve Problem w/ 15° & 100mph
  • jaglavek
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Maximum attainable coefficient of static friction
  • canza
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Horizontal Tension Between Two Blocks?
  • cryptcougar
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Rotating ring supported at a point
  • nns91
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Projectile motion (magnitude and direction)
  • blazeuofa
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4
Solve Simple Pendulum Homework: Max Velocity of Pendulum Bob
  • Basne_Kaled
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Fence Height for Detached Race Car Wheel at 45m/s
  • chrisridgwell
  • · Replies 13 ·
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At what distance can your eye no longer resolve two headlights?
  • limonysal
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Electricity & Magnetic Fields - What do they Resemble?
  • stickplot
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Distance of closest approach of particles
  • KillerZ
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2
How Much Should the Microscope Be Raised After Adding a Plastic Layer?
  • RafaFutbol
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Electromagnetic waves radie antenna HELP
  • MEAHH
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What Is the Angle of Inclination for a Car on a Banked Track?
  • chrisridgwell
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AnswerSolving Electrostatic Force: Find Charge & Mass
  • nic4birds
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What is the magnitude of the tow bar force on the skier?
  • DeltaIceman
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What Is the Equilibrium Temperature When Aluminum Meets Water?
  • Brit412
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How Do You Calculate Tension in Multiple Cords Supporting a Single Mass?
  • enantiomer1
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Applied Force Vs. tension Force
  • enantiomer1
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F=ma problem, I feel retarded because I can't get it
  • phx1
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Calculate Charge on Ball Given Electric Field and Mass
  • 1517279
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5
The Minimum Angle for No Sound Transmission Through a Doorway
  • jemstone
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What Range of Speeds Allows a Car to Safely Navigate a Wet, Banked Curve?
  • botab
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Calculate the Depth of a Well: u, a and Time Given
  • milto
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Variable acceleration, time, distance
  • Markisen
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What is the net force on the block immediately after it starts to slide?
  • AIMheels22
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Gauss's Law: Electric Field from Long Cylinder w/ Charge Density
  • winterwind
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Need help with Simple kinetic model for solids, liquids and gases
  • blueforest
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What is the tangential acceleration?
  • elcaptain
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Driven Harmonic Oscillator - Mathematical Manipulation of Equations
  • phyzmatix
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Charging by Contact: Calculating Charge on a Sphere after Multiple Contacts
  • 9giddjl
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How Does Earth's Orbit Affect Light Travel Time?
  • ahrog
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What is the Magnetic Field at the Center of a Current-Carrying Loop Segment?
  • jromega3
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What is the formula for the electric field above a plane?
  • likephysics
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How Far Do Ink Droplets Fall in a Printer?
  • tnutty
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What Are Atomic-Sized Wavelengths in the Electromagnetic Spectrum?
  • stickplot
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Blocks on a tabletop attached to a mass suspended by a pulley
  • Wobble
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Gravitational attraction question
  • inner08
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How Far Does a Sprinter Run During Acceleration in a 100m Dash?
  • nathan scott
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Calculating Train Speed Increase: 1.5x10^7 kg Train
  • Jordash
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Simple Pendulum & Elevator Homework | Period Formula for Accelerating Elevator
  • hansel13
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Simple Circuit Analysis: Finding i_{x} with Mesh Analysis
  • ttiger2k7
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Exploding Projectile Problem: Finding Velocities and Mass Ratios
  • Noob.com
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How to calculate , acceleration, force, momentum and impulse?
  • libertylovescie
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Speed and Distance: Calculating Impact Velocity
  • HellRaiser30
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Metal sphere left by alien civilization
  • winterwind
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Parallel resistors and ammeter problem
  • Gregg
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Uniform circular motion and acceleration
  • spacecadette
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What is the Angle Between Vectors A and C?
  • raptik
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How Do Photons Exert Force Without Mass?
  • vette982
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Finding Voltage and Resistance in a Series Circuit
  • tamz273
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Solving Physics Questions: HARP Gun & Speeding Automobile
  • masterboy786
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Electric Field and Force in a Cell Membrane
  • nic4birds
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Wavelength of carrier frequency radio signal
  • stickplot
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Solving for Electron Acceleration and Time in a Television Tube - Homework Help
  • elimenohpee
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How Do You Convert a Scalar Force into Vector Notation in Physics?
  • yoleven
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Help with time/acceleration problem
  • nathan scott
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Questions about Forces and Tension
  • vivekfan
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Calculating Heart Rate from CRT Display for Beginners
  • QueryQueen86
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Sear's and Zemansky Ex. 17.10: What's Cooking?
  • FountainDew
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How Do You Solve for the Time Given Initial Velocity and Angle?
  • papa_smurf493
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Solve Thevenian Theorem: Calculate Voltage Across A and B
  • roshan2004
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How Do You Calculate Tension and Normal Force on an Inclined Plane?
  • spacecadette
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What Is the Minimum Speed Needed for a Boulder to Clear the Dam?
  • Bottomsouth
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Net Electric Field: +q1 -q2 Spot at 0 E
  • ptdreamer
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How to Correctly Position an Ammeter to Measure Headlight Current?
  • dasblack
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De Broglie wavelength of 30keV electron
  • catkin
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Calculating Energy Released from Uranium Fission
  • estiy
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Questionable resistance pictures included
  • dasblack
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Solve Vector Conversion Problem in Cylindrical Coords
  • bengaltiger14
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U-tube: Water Rises Slightly - Get Help on the Right Track
  • hansel13
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Single Slit Exp: Find Number of Minima in 0-19deg Range
  • dsptl
  • · Replies 3 ·
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Help with critical angle calculation
  • shar_p
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How Do You Calculate the Velocity of a Rotating Vector?
  • wizard85
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Vector problem: flagpole with wires at different angle
  • prime-factor
  • · Replies 9 ·
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The Cliff Diver - Projectile motion
  • Bottomsouth
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Energy of proton moving fast (special relativity)
  • FatheadVT
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Cube Electric Field: Are Intersections Uniformly Distributed?
  • bocobuff
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Finding a frequency to create a given amplitude in a spring
  • ViXXoR
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What is the speed at which the object was thrown upward?
  • jgens
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Instantaneous show of light why?
  • wayneinsane
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How Do Light Waves Destructively Interfere in a Bubble Film?
  • stickplot
  • · Replies 3 ·
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Fundamental Frequency of a string
  • nn3568
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Solve Football Hangtime: Calculate Time to Hit Ground
  • beau21
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Speed when swinging from a rope?
  • Bigdane
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How Is Friction Affecting the Motion of a Block on a Horizontal Surface?
  • DeltaIceman
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Calculating Period of Hubble Telescope Orbit
  • cstout
  • · Replies 14 ·
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Physics ball thrown in air question
  • physics120
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What Is the Correct Velocity of the Standing Wave?
  • Spirochete
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A wave generator produces 28.6 pulses in 4.10 s
  • DDRchick
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