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.
Solving for masses in an elastic collision
  • mruss
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Finding the electric field at a given point
  • kirax105strike
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Velocity Calculation - ball bouncing off a wall at an angle
  • Molly1235
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What Is the Altitude of a Plane Traveling at Mach 2.5?
  • jvdamdshdt
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How does oil affect the buoyant force of a block of wood versus water?
  • agw
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Finding the magnitude of the electrostatic force from a thin rod
  • nuagerose
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Calculating Average Speed of Tennis Ball
  • Alucard2487
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Solve Average Velocity for Person Running Around Triangle
  • jakb93
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What is the Minimum Size L for Uniform Density with Less Than 1% Error?
  • xdrgnh
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Equation for object size relative to reflection?
  • Violagirl
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Determine the total charge on the surface?
  • nuagerose
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Water being hosed into the air.
  • rkum99
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How to find the average accleration on a velocity time graph
  • wittlebittle
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Electric Field and Work on a Moving Charge
  • anthonych414
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Tension and Force in pulley system
  • Plasmosis1
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Determine the total charge needed to apply to the electroscope.
  • NasuSama
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Approximate the strong force between two protons.
  • tjhero123
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Electromagnetic Waves Questions
  • whitehorsey
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Understanding Virtual Images in Lenses and Mirrors
  • whitehorsey
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Reversible heat pump - Work input?
  • Splint
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What is the value of θ when the error in sinθ ≈ θ is approximately 5%?
  • Gee Wiz
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Adding a capacitor in series question
  • awstinf
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Can the acceleration of the proton be negative for this situation?
  • NasuSama
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How Do You Calculate Uncertainty in the Volume of a Cookie?
  • lep11
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Temperature and pressure in a laboratory
  • RafaelF13
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Three Phase PV Grid-Tied System(MPPT)
  • JermziePV
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How to Determine the Units of a Homogeneous Equation in Physics
  • MemoNick
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How Do You Calculate the Electric Field of a Ring?
  • tuggler
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What Determines the Escape Speed from Earth's Gravitational Pull?
  • hadronthunder
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Why Does Integration Differ Between Electric Fields of a Disk and a Line Charge?
  • tuggler
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Solving Kirchhoff's Laws: I1, I2, I3
  • IronHide
  • · Replies 26 ·
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How Do You Calculate Object-to-Image Distance in Lens Systems?
  • Aelo
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7
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But, as a webpage title: Wave Problem: Solving for Phase Shift
  • freezer
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2
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How to calc the force needed to change direction of a moving object?
  • Dastan
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What Is the Proper Length of Spaceship 2 in Its Rest Frame?
  • Gemini_Cricket
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Percent uncertainty in Volume of a beach ball?
  • eddiedowen
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Solving Ball Bearing Problem: Tower Height & Impact Velocity
  • Sylis
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4
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Why is the Induced Current Clockwise in this GRE Problem?
  • PsychonautQQ
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HEY YOU Double Doppler/Radar Guns/Equation Derivation
  • Jamie1995
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Finding Applied Force from Coefficient of Friciton and mass
  • jmcpherson82
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Projectile motion, find speed/time of football kick
  • QuantumCurt
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7
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Troubleshooting a Velocity vs. Time Graph: Position at t=10
  • Psyguy22
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4
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Special Relativity GRE question (Where is my method flawed?)
  • PsychonautQQ
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John Taylor Classical Mechanics Chapter 1 Problem 46
  • karmonkey98k
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John Taylor Classical Mechanics Chapter 1 Problem 22
  • karmonkey98k
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How Do You Calculate Projectile Motion for a Cannonball?
  • mattwild
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Thermodynamics- rms translational kinetic energy
  • yaykey428
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Boat heading and relative velocity
  • drjohn15
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Three hanging balls of uniformly distributed charge
  • derravaragh
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Where Is the Electric Field Zero Between Two Negative Charges?
  • tuggler
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Tricky problem - Find E-field of a sheet of charge
  • mindarson
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Small clarification: applying Coulomb's Law
  • UselessLadder
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Intro physics proportion question
  • dylanhouse
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Predicting Final Velocities for a Head-On Elastic Collision Problem
  • ~Fluffy
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Density of holes on a sprinkler for uniform water distribution
  • forestmine
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Kinematics question - Rocket launch
  • rhoadsy74
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Capacitance, Charge and Voltage (P.D.)
  • MemoNick
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Kinematics question - An automobile accelerating and braking
  • rhoadsy74
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Calculating Flux Linkage in a Rotating Rectangular Coil
  • MemoNick
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Physics free-body diagram problem?
  • kal854
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Which of the Following is false?
  • spockjones20
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Find Current I3 in Circuit - Homework Statement
  • Gauss M.D.
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How Do You Solve the Motion of Two Colliding Pendulums?
  • mattwild
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Puck on a sphere, energy & Newton's 2nd
  • Habeebe
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Moment inertia - theoretical problem
  • silenzer
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Equivalent Circuits: How Do (a) & (b) Compare?
  • Miike012
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Voltage Divider: Solving for V in Series Circuits
  • Miike012
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Equivalent resistance of a cube of resistors
  • pc2-brazil
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E&M Problem - 2 Charged Masses Hanging on Strings
  • inferno298
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What is the 1/e Lifetime of a Graph?
  • Richard Ros
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Circumference of Earth With Eratosthenes
  • tchouhan
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Time to Mars (orbit around Sun given perihelion and aphelion)
  • oddjobmj
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How Do You Calculate the Time Period in a Spring-Block SHM System?
  • Saitama
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Magnitude of Force of two point charges on a third (electrostatics)
  • ctallarico20
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Having problems understanding units
  • FTCC.student
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Mechanics - inclined plane with friction and finding max M
  • skwissgaar
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Oppositely Charged Parallel Plates
  • mattwild
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Calculating Reaction Force on a Stationary Wall in a Rotating System
  • Dlong
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How Many Strides on a Moving Sidewalk?
  • shealya
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Thermodynamics First Law Problem
  • cytochrome
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Fluids question: U Shaped Tube.
  • Eilrymist
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Calculating Orbital Radius for Geosynchronous Satellite Using Kepler's Third Law
  • tchouhan
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What Are the Average Forces and Friction in These Motion Problems?
  • The Precious
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Maximum potential given a charge
  • c1223
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Separable PDE for electric field in a cavity
  • gboff21
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Solve for position given force in a mass-spring system?
  • kal854
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How High Was the Tree from Which the Squirrel Fell?
  • Gazaueli
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Friction Acceleration: Solving for Coefficient and Force Angle
  • rogerbrian05
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Finding centripetal acceleration and velocity
  • FreshyT
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Leap Off an Asteroid: Escape Earthly Gravity?
  • tjsingle
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Momentum Investigation: Car collision
  • Silurias
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2
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Circular Motion Problem 2: Help with Solving | Physics Forum
  • thunderhadron
  • · Replies 10 ·
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10
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Solving Circular Motion Problems | Book Answer Included
  • thunderhadron
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Can Work, Power, and Energy be Solved Together?
  • thunderhadron
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Solving a Force Problem: Tips and Tricks for Finding the Correct Answer
  • thunderhadron
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Solving a Rotation Mechanics Problem: Option D vs Attempted Solution
  • thunderhadron
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8
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What is the Solution to a Confusing Circular Motion Problem?
  • thunderhadron
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Find Maximum Separation of Points A & B with 4000N Tension in Ropes
  • atagl1
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Calculating Force on Quarter Cylinder Dam Gate with Hinge and Stopper
  • cambo86
  • · Replies 5 ·
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Electric Field Calculation for Infinitely Long Charged Line and Rod
  • Govyadina
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2
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