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.
Conservation of momentum and jumping girl
  • nns91
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4
How Does the Sojourner Rover Perform Scientific Tasks on Mars?
  • Raynor.Jim
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Pendulum collision and elastic collision
  • ihateap
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1
Parallel Plates Homework: A Proton Accelerated From Rest
  • Inertialforce
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13
How Do I Solve Thin Film Interference Problems?
  • Nivlac2425
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4
Mechanical Energy question (Skier going down a slope confusing )
  • physicist2be
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Vector expressions - equivalence
  • jemerlia
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2
Electrostatics and potential question
  • Inertialforce
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4
Electric Field & Coulomb's Law Problem
  • AznBoi
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6
What Is the Applied Voltage V Between Charged Plates?
  • Inertialforce
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4
Projectile Motion Problem with spitting a seed
  • cmh_580
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8
Masses and a Light Rod: Solving for Linear Acceleration Without Gravity
  • tachu101
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7
Electrostatics - Magnitude and direction of electric force
  • Inertialforce
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1
Calculating Gate's Torque, KE & Angle When Bull Rushes Out
  • tachu101
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5
Question about a double-slit experiment
  • Nivlac2425
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5
How Does Torque Relate to Force and Distance in Physics Problems?
  • maccha
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1
What is the angular speed of a rotating line of skaters?
  • vladimir69
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6
Non-uniform acceleration equation
  • candycooke
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1
Calculating Relativistic Length of a Moving Spaceship
  • salsabel
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7
Calculating Rotational Kinetic Energy and Instantaneous Rate of Change
  • tachu101
  • · Replies 15 ·
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15
What is the time bullet take to get at the animal ?
  • UNknown 2010
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1
Horizontal distance of horizontally fired projectile
  • physicsman2
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3
How Is String Tension Calculated in Vertical Circular Motion?
  • Kyriam
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1
What is Liouville's theorem all about - Thermodynamics
  • annetjelie
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4
Angular velocity find angular displacement
  • tachu101
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6
What is the Rebound Velocity of a Pea Bouncing off a Surface?
  • thomas49th
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6
Energy of the Simple Harmonic Oscillator
  • adashiu
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8
Calculating Impulse in a Collision: Positive or Negative Velocity?
  • ph_lover3294
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4
Centre of mass of a solid hemisphere.
  • grahammtb
  • · Replies 7 ·
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7
Simple Moment of Inertia Question
  • tachu101
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2
Hydrostatic equilibrium for stars question
  • coffeem
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1
Pendulum Problem: AP Physics 1985B1
  • hty21
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1
The Block–Spring System Revisited
  • adashiu
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4
Difference between Static and Kinetic coefficients of friction?
  • Air
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7
How Does Net Force Affect Object Movement Along a Straight Line?
  • Raynor.Jim
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3
Joule Mobile Mass Transporter Project
  • ieatoranges
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4
Calculate the Flux through the Pipe Part 2
  • Saladsamurai
  • · Replies 23 ·
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23
Acceleration of Two Objects on a Pulley
  • Yoshiko75
  • · Replies 14 ·
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14
Inelastic Collision Problem. Help
  • blue_bee29
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1
Inelastic Collision Problem. Help
  • blue_bee29
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1
Elastic Collision Problem. Help
  • blue_bee29
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3
Calculating Acceleration of 2 kg Ball on Inclined Plane
  • Pupil
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9
Distinguishing the difference between the same note on different instruments
  • clairez93
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6
Is the Velocity Vector Perpendicular to the Position Vector?
  • Tasell
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1
Projectile motion (the dreaded volleyball problem)
  • boomer77
  • · Replies 17 ·
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17
Car Collision Speed Calculations
  • Gregg
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4
PLEASE HELP inclined pulley 2 masses
  • hersheykis
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12
Solve Mystery: Properties of Matter Q: Thimble of Water in Ocean
  • NZ-Minty
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7
How Quickly Can Two Stacked Boxes Travel 5 Meters When Pulled by a Rope?
  • theneedtoknow
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Velocity/displacement 11th grade physics
  • lax1113
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5
Projectile motion (ball thrown horizontally)
  • boomer77
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13
What is the Initial Mass Function problem and its solution?
  • grahammtb
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4
What Forces Act on a Car at the Peak of a Hill?
  • pippintook
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1
Motion with a changing acceleration
  • fizics
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6
Sliding vs Rolling: Homework Analysis
  • gigglin_horse
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4
Projectile motion (soccer kick)
  • boomer77
  • · Replies 24 ·
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24
What type of Accelrator is the LHC?
  • TFM
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3
List three reasons why knowing the speed of sound is important to your life?
  • Shamamsi
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2
What is the Relationship Between Period and Magnetic Field in a Cyclotron?
  • TFM
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7
Astronomy Polytrope definition question
  • coffeem
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Constituent traveling waves and strings and vibrations
  • clairez93
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Calculating acceleration and brake force
  • cyberhev
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Inverted Pendulum Homework: Solving Equation (1)
  • saltine
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6
What is the Density of a Mixture of Two Liquids in a 1:3 Ratio?
  • dude123
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Calculate the Flux through the Pipe
  • Saladsamurai
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4
Question on timbre (Sound waves)
  • Absolution
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3
Heat Transfer Final Temperature Problem
  • breez
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Projectile motion question (baseball problem)
  • boomer77
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7
How Is Friction Force Calculated on an Incline?
  • lu6cifer
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Resistance of a brick - Old coursework question
  • Burningmace
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4
Deflection of plasma stream near magnetically-responsive surface
  • ChasChandler
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How Does Feynman's Definition of Photon Polarization Differ from Hecht's?
  • Sam_Goldberg
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Calculating G Forces or the Centripical force
  • fastlane51
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6
So, How to Find x - Rod Standing on Frictionless Table (Rotation)
  • FedEx
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Free fall: total distance expressed in terms of distance fallen in nth second
  • jemerlia
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6
Solving Electric Potential 3: (kQ^2/R)
  • asi123
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5
Why Can't I Get the Correct Constants in My Chemical Reaction Calculations?
  • saltine
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2
Solve Car Chasing Problem: How Long to Catch Speeder?
  • Axpyre
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7
How does the frequency of a wave affect its power transmission?
  • clairez93
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2
Solving Frequency Equation to Match y=mx+c
  • l.e.d.
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Fundamental standing wave problem
  • clairez93
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Physics question-finding the magnitude of the electric field
  • nba23
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1
How Do I Calculate the Internal Resistance in a Circuit?
  • tweety1234
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3
Direction of Electric on a Circle
  • FiskiranZeka
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Calculating current in series circuit
  • tweety1234
  • · Replies 6 ·
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6
Finding Range, Max Height and Speed of Projectile
  • jheld
  • · Replies 4 ·
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Block sliding down frictionless semicircle
  • platinumtucan
  • · Replies 5 ·
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5
Electric Potential: Is My Answer Correct?
  • asi123
  • · Replies 2 ·
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Help with Electric Potential 2 Homework
  • asi123
  • · Replies 2 ·
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2
Cannon Problem (Projectile motion)
  • I_LoveCasey!
  • · Replies 11 ·
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11
Motion of Two Cars: Velocity Calculation in Same Direction - 1 km/h
  • missmerisha
  • · Replies 3 ·
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3
What Is the Current in a Rotating Electron Model of a Hydrogen Atom?
  • coffeem
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How would you solve a momentum problem including friction and/or springs?
  • spectravoid
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4
Why is the gravitational potential not zero at the neutral point?
  • nokia8650
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Finding the Magnetic Flux of a Coil
  • nokia8650
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Capacitor Key: Potential Difference between K-L
  • FiskiranZeka
  • · Replies 19 ·
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19
Youngs Double Slit: Intensities at Maxima & Minima
  • Sparkle2009
  • · Replies 4 ·
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Normal force when on a horizontal surface
  • wesDOT
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Conservation of Mechanical Energy-help
  • moephysics
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5
What is the Bungee Jumper's Speed at a Height of 12.5 m Above the Water?
  • Uncle6
  • · Replies 5 ·
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5