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.
System of two inclines planes and pulleys
  • deea11235
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Linear and angular acceleration problems.
  • brenfox
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Variable mass system - sand falling on flatcar
  • Saitama
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How to find the maximal mechanical power output of a stearin engine?
  • ArenasField
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Determining power supplied by battery
  • Miike012
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Projectile motion car tires question
  • samman010
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13
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Magnitude and Direction of Electric Point Charges
  • StudentA1
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Quick question (not homework) just wondering
  • failedphysics
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Simple pendulum- ang v at time from mass, length, and ang v at 0 rad
  • natasha13100
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Finding the Orbit of a Particle with Varying Position Vector
  • d2x
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Motion in one dimension- total trip time
  • QuantumCurt
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Determine the components of P in the i, j, and k directions.
  • anonymous812
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Is Surface Tension Directed Along or Perpendicular to the Liquid Surface?
  • andyrk
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Affect of Friction on Acceleration and Deceleration
  • Molly1235
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Minimum Deceleration for Car to Avoid Truck: Physics Homework
  • TeeNaa
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Charged Spherical Shell and Solid Sphere
  • andyrk
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Maximum Length for Coaxial Cable in a 100 ns Noise Transfer Scenario
  • usn7564
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Find Zero Field Location of Two Charges of q1=4μC and q2=-1μC
  • hacker804
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Soap Film Formation: Explaining the Phenomenon
  • andyrk
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Magnetic Field (Hollow Copper Pipe)
  • roam
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2
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How Do Galilean Transformations Affect Measurements in Different Frames?
  • austim14
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Point charges in electric field
  • tuggler
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Understanding Torque: Solving a Wrench Homework Question
  • silenzer
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What does the S/m stand for?
  • KatrinMD
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Electric potential of water droplets
  • tsgkl
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6
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How to combine percentages (Solely Simple Math Problem)
  • Fisher92
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Connecting Charged spheres by a conducting wire
  • andyrk
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7
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Why Does Earthing a Charged Sphere Neutralize Its Charge?
  • andyrk
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Electric field for point charge
  • tuggler
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4
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What is the Fraction of Electrons Removed from a Charged Ball of Copper?
  • tuggler
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2
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Exercise on collisions and oscillations
  • jones123
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2
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Calculate Tension in String of Conical Pendulum
  • sliinky
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How Far Does m1 Travel Before Colliding with m2?
  • postfan
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4
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What is the net force on the third spider (S3)?
  • tuggler
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1
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Find the point b/w two charges where the electric field is zero?
  • kashan123999
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What is the Angular Momentum of a System with Pulleys and Blocks?
  • postfan
  • · Replies 20 ·
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Trouble with Dimensional Analysis
  • mileena
  • · Replies 9 ·
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9
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21K
Position of elevator given velocity vs time
  • drjohn15
  • · Replies 9 ·
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Solve Forces Homework: Find Forces in Members as Functions of P and θ
  • smutangama
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9
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Where should a second hole be placed in order for the light [ ]?
  • s3a
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Projectile Motion w/o Horizontal Givens
  • Penguin'15
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5
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Angular Momentum and Acceleration in a Pulley System: Calculations and Equations
  • mshmsh_2100
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Finding the magnitude/direction of a resultant vector?
  • anonymous812
  • · Replies 4 ·
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4
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Electric field strength and electrostatic potential
  • UnD3R0aTh
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How Is Engine Efficiency Calculated Using V1/V2 in Thermodynamic Cycles?
  • davidchen9568
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Can You Calculate How Long it Takes to Drain a Car Battery with Headlights On?
  • FredericChopin
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Electrical forces between two beads in a hemisphere
  • Nick O
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Air in the Lungs thermodynamics help
  • Nigzzzz
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Deriving of the constants in Fourier Analysis
  • PsychonautQQ
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Dimensional anaylsis problem involving trigonometry
  • mileena
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Calculating amount of raindrops
  • anthonyslvtr
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Calculating the speed of a β-particle?
  • Mikry
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How to find water vapor volume at different pressures than atm?
  • rhinohugger
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Why Do Inverse Lorentz Transformations Seem Inconsistent in Special Relativity?
  • PsychonautQQ
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Real fundemental physics problemsDon't laugh
  • Fishingaxe
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Urgent: Need Help Checking Thevinin's Theorem Calculations
  • Razor3210
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What is the Instantaneous Velocity at t = 4.0s?
  • Fishingaxe
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Locomotive throwing sand in a car
  • Saitama
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2
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Static Electricity: Positive & Negative Charges
  • tetoo
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QM - Transmission coefficient for square well
  • DeltaFunction
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Finding velocity equation for object moving in 2 dimensions
  • Wumbolog
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Understanding Vector Addition in Acceleration Problems
  • PsychonautQQ
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Does Coulomb's Law Apply Equally to Unequal Charges?
  • Yosty22
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What Is the Period of Oscillations in a U-Tube with Varying Radii?
  • mbigras
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Two blocks and a spring system - Finding equation of motion
  • Saitama
  • · Replies 25 ·
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Find angle, given the tension of the rope.
  • brikayyy
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Expansion of gas through valve
  • CAF123
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11
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Can somebody walk me through this Special Relativity clock sync proble
  • PsychonautQQ
  • · Replies 13 ·
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Optics - Find the location of object
  • Saitama
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4
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Why is the answer to this GRE physics problem choice A?
  • PsychonautQQ
  • · Replies 8 ·
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Elementary lens system, microscope with negative ocular
  • usn7564
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Parallel Plate Capacitor with Dialectric
  • AdkinsJr
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Veritasium - Firing bullet in block - along center and away from cente
  • cupid.callin
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GRE Conservation of Energy problem.
  • PsychonautQQ
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Is Length Invariant Under Galilean Transformations?
  • hatachiclaud
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Help, a very basic physics problem.
  • Fishingaxe
  • · Replies 7 ·
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Solving Umax with Pmax and Ohms
  • Ren_Majer
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Modified Coulomb model for hydrogen, minimising error
  • bobred
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4
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Which Equation Should Be Used for Finding Maximum Constant Deceleration?
  • sandman203
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RC DC Series and Parallel Circuit
  • DeadFlower
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Find the velocity of a particle from the Lagrangian
  • Lightf
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Two pendulums banging into each other problem.
  • tjhero123
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3
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Dynamics in Two Dimensions Question
  • Enduro
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Projectile Motion without Initial Velocity
  • PerryKid
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Friction On 2 Blocks + Angled Pull
  • sandman203
  • · Replies 47 ·
2
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Impulse in an inelastic collision
  • TurtleYack
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The balancing point between two point charges
  • UnD3R0aTh
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Shape of mass vs acceleration graph?
  • noahsdev
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Atmospheric Pressure and Mercury in a Test Tube
  • yenhan10
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Can Object A Be Neutral Based on Charge Interactions?
  • kickthatbike
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How Do You Find the Combined Elongation and Phase Shift of Superimposed Waves?
  • Gauss M.D.
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Where did I go wrong in this special relativity problem?
  • PsychonautQQ
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1
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Special Relativity particle decay.
  • PsychonautQQ
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1
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If two books are tied together with a string
  • UnD3R0aTh
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Which case generates emf by electromagnetic induction
  • UnD3R0aTh
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Iron ball hanging from a scale and suspended
  • UnD3R0aTh
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A coil of wire is placed along the axis of a solenoid?
  • UnD3R0aTh
  • · Replies 28 ·
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Ice/Water Composition in Basic Thermodynamics
  • "pi"mp
  • · Replies 6 ·
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6
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What is the Direction of the Angular Momentum of a Bike Going Around a Circle?
  • postfan
  • · Replies 1 ·
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Bar Swinging Up After Collision - Strategy
  • postfan
  • · Replies 6 ·
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6
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