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.
Understanding Heat Transfer in a Ice-Water System
  • KylieB
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Police Car Acceleration: Time and Distance to Catch a Speeding Car
  • Zashmar
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Relationship: Force on a charge at some distance from capacitor Plates
  • Minhtran1092
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Relative velocity at a junction
  • Woolyabyss
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8
Wavelength Problem Homework: 2L or 4L for 0.5m String?
  • PhizKid
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Static friction and fraction of mass of rope that can hang.
  • chiuda
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The Compton Effect: Find the angles of scattered photon and electron
  • amr55533
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Dynamics Problem (suitcase pulled across floor find Fn)
  • chiuda
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7
How Do Horizontal Components Affect Total Tension in a Spring Balance?
  • Member69383
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Explain to me Step Functions for VT graphs
  • kencamarador
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Projectile motion problem (find angle theta)
  • 5ymmetrica1
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How Do You Solve a 1-D Motion Kinematics Problem Involving a Missile?
  • dazed6531
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3
Moment of Inertia: Object w/ Rod & Sphere
  • cp255
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2
Statics, bike on inclined plane
  • jonjacson
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12
Current in a rectangle on a hinge
  • lodovico
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3
Translating motion graphs. Dt to vt
  • kencamarador
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2
Particle in a Box: Calculating P from 0 to 0.2 nm
  • ahhppull
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Acceleration directions and friction.
  • SaxonMilton
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7
(2D problem) What angle will yield maximum horizontal range?
  • physics1829
  • · Replies 8 ·
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8
Turning wheel, simply angular momentum
  • Ground State
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5
Tutor (me) needs help on pulley angular accel question
  • Ground State
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3
How to find acceleration given two masses , an angle ,and kinetic fric
  • Sneakatone
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Solve Cyclotron Question: Calculate Magnetic Field & Time to Exit
  • CAF123
  • · Replies 6 ·
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6
Plate conductor in electrostatic equilibrium
  • member 392791
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Does Tailwind Affect Airplane Speed Based on Size or Mass?
  • lep11
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4
Direction of Torque on Parallel Wires with Current
  • Gee Wiz
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2
Energy question with constant velocity
  • Jabababa
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7
How Do You Calculate Average Induced Voltage in a Changing Magnetic Field?
  • bsugeology
  • · Replies 7 ·
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7
Calculating Electric Flux Density in a Dielectric Material
  • Nikitin
  • · Replies 6 ·
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6
Projectile race track physics help
  • Sam Fred
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3
De Borglie's wavelength equation
  • athymy
  • · Replies 11 ·
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11
Which Material is Best for a Milkshake Straw?
  • Ransomed
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2
Find the value of aerodynamic constant C for this dimpled sphere.
  • Sneakatone
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6
Understanding Significant Figures: Rules & Examples
  • babysnatcher
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5
Acceleration with Velocity Problem.
  • kencamarador
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4
Average speed of person walking
  • babysnatcher
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Ballistic Pendulum initial velocity of bullet
  • MathHelpa
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Ohm's Law, Resistance, and Power
  • jperentosh
  • · Replies 6 ·
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Capacitor charge in parallel RC circuit
  • woaname
  • · Replies 4 ·
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Uncertainties in fluid viscosity experimental trials
  • physicsdude123
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4
Top view of a Gaussian surface in a uniform electric field
  • brojas7
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Help with elastic collisions/kinetic energy problems
  • PhilliesFan
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2
What is the force of the floor on her feet?
  • x86
  • · Replies 11 ·
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11
Physics Kinematics Homework Help ?
  • jayjay55531
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Finding phi constant based on initial position and initial velocity
  • InvalidID
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Vapor-compression refrigeration cycle
  • zircons
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Simple circuit analysis w/ voltage sources - MasteringPhysics wrong?
  • resigned
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0 Electric potential between point charges?
  • blazen2392
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Calculating Gravitational Potential Energy Increase: 3.0kg Object
  • Jabababa
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Find number of trials to be done to get specified uncertainty?
  • sloane729
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A Question on Special Relativity
  • dom139
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Magnetic field motion different scenario
  • woaname
  • · Replies 16 ·
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Work done to pull the entire chain
  • deep838
  • · Replies 5 ·
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The Bohr-Rutherford Model of Hydrogen
  • pakqft
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Projectile motion problem - tennis player hits a ball
  • 5ymmetrica1
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Special Relativity and spaceships
  • pakqft
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Hard intro circuit problem help please im stuck on this one for hrs
  • nchin
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What Are Frequency of Beats and Effective Frequency in Wave Interference?
  • InvalidID
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How Do You Simulate a Binary Star System with VPython?
  • besjbo
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How is equation 15.14 derived in the wave speed derivation?
  • Fluxthroughme
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Finding the Electric Field Outside of a Spherical Shell Using Gauss's Law
  • skate_nerd
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Mass dropped onto vertical spring what is the max compression?
  • MathHelpa
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How Do You Calculate Velocity in Calculus-Based Physics?
  • student34
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Check my work please? Circuit analysis, resistors in parallel, help
  • nchin
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Find distance electron travels before turning around
  • penguinnnnnx5
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Why are there two different equations for normal force on an angle?
  • student34
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Finding the coefficient of friction
  • theeggwoman
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Velocities of colliding particles (Kinetic and Potential Enegies)
  • 14dfg
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Why is the normal force included in this plane's minimum radius problem?
  • sakura741
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Vector Scalar or Not Applicable?
  • Stanc
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How Does Wind Affect an Airplane's Flight Path and Speed?
  • Stanc
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Cartesian 3D Vector Plotting Points?
  • Stanc
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How Old Should You Be To Learn Calculus
  • lch7
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Finding work done by downward force and increase in thermal energy
  • rockchalk1312
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What is the maximum mass of the ring in a beads sliding down a ring problem?
  • Platformance
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Calculate when displacement are equal
  • ahmedb
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Centripetal Force and Uniform Circular Acceleration
  • roberttk01
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Tangential and Radial components of acceleration and tension
  • Eohlas
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How we measure magnetic disturbances?
  • stavrospao
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Calculating Forces on a Charged Particle in a Magnetic Field
  • woaname
  • · Replies 14 ·
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Calculating Electromotive Force in a Circuit
  • joel amos
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What are the Currents in a Multi-Level Parallel Circuit with 6 Leads?
  • joel amos
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Derive Formula for Final Velocity (v2) Without Time
  • NeedBetterName
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What is the role of atmospheric refraction in a sunset?
  • cris9288
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Finding Forces in a 2D Bridge: Determining Pressure and Tension
  • Numeriprimi
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What Is the Net Force and Electric Field on Charge 1?
  • waleed.ahmed
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Motion in fields - Space Shuttle orbiting the Earth
  • KrisG
  • · Replies 1 ·
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Particle in Simple Harmonic Motion
  • Willjeezy
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Temperature of filament using its area, power, and emissivity
  • Fluxthroughme
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How Do You Determine the Natural Abundance of 244Hb and 240Hb?
  • Eddzzz
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Solving Kinetic Friction: Find Coefficient of Friction from Car Stop
  • mels
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Why Does Rotating the Michelson-Morley Apparatus Alter the Time Delay?
  • BareFootKing
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Speed of Jet Plane - Solving the Problem
  • Von Neumann
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Frictional force on a block held against a vertical wall
  • freddyeddyjor
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How Is Efficiency Calculated for a Carnot Engine with Given Cycle Parameters?
  • Von Neumann
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Help electric charge Coulomb's law two charges?
  • asdf12312
  • · Replies 23 ·
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Power Supplied to a vibrating string
  • Willjeezy
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Find friction from stopping distance and initial speed.
  • Sneakatone
  • · Replies 23 ·
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Questions about finding position, velocity, acceleration related
  • Ryukouki
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Sound waves travelling different paths
  • PhizKid
  • · Replies 3 ·
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3