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.
Why Are Currents Through 3 and 4 Ohm Resistors Zero in an Open Circuit?
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Maximizing Speed: Solving for the Maximum Speed of a Moving Particle
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Young's double-slit experiment, fringe separation
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Maximize the distance of projectile on a hill
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Applying work energy theorem to unifrom circular motion
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Mechanical Energy and Newton's Laws
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How to calculate velocity from Mass and Force but no Time
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How to work out this impact force
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Magnitude of a vector in polar coordinates
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Calculating Velocity of Falling Grenade Fragments: Momentum Equation Solution
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What variables are needed to find a moment?
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How Fast Can Electro-Fiasco I Travel 1 km from Rest?
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Understanding Electrostatics: Explaining Charge Separation in a Physics Lab"
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What Is the Mass Flow Rate at Exit in a Steady Flow System?
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Entropy change and reversible/irreversible processes
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Another relativistic particle decay question
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AC Output Voltage as function of frequency
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How to calculate force exerted by ground
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Pressure Drop In Bulb : Application of Graham's Law
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What Is the Stopping Distance When Initial Speed or Friction Force Is Tripled?
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Solving Speed of a Truck Problem - Calculating Time to Brake
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What unit symbol is this and what does Gg represent?
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Distance a bullet will travel while shot underwater
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Help Calculating a interstellar Speed requirements
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Force acting on anode by electron current
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Motion in 1-D Problem: Tractor vs Tesla Collision Calculation
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Electron released into an electric field from rest
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Perpendicular relativistic velocities
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How Much Power Is Needed to Lift a 1kg Object to 1 Meter?
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Why Does Moving a Negative Charge to a Higher Potential Increase Its Energy?
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Calculate net charge with nonuniform electric field
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Velocity of Bead Relative to Wedge on a Smooth Hemispherical Surface
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Nonconducting spherical shell with uniform charge
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Why is the potential at the surface zero in this question....
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Do holes conduct electricity in metal?
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Archived (Optics) Vignetting and field of view
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Related Rates of Accelerations in Pulley Problem
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Entropy: gas heated by resistor
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One second after vertical projection
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Man holding weight, rotating and bringing them closer
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How Does Moving a Slider from Y to X Affect Potential Difference Across Lamps?
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Calculating Distance of a Brick on a Hill with Friction
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Find heat produced on closing the switch S
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Gas inside an expandable cylinder raises lid on spring
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How Fast Must Muons Travel to Reach a Distant Target Without Decaying?
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Centripetal Force of a linear spring
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How would you find Va and Vb in the problem below?
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Direction of dipole moment in e-field of another dipole
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Two pulley and three mass system
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Calculating Average Speed: Physics Homework Problem
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Atwood's machine with two connected discs
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What is the maximum height a man can climb on a ladder before it slips?
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What is the thickness of the styrofoam?
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Calculating Tension Forces on Charged Balls Suspended by Strings
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Equilibrium Problem - Balancing Torques
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Nuclear binding energy and mass difference
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Atmospheric Pressure on Shaft of piston cylinder assembly
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Question about electric field of a point figure in book
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Special Relativity: time for light to traverse a rocket
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Archived How Thick Should Insulation Be for Optimal R-Value in Cold Climates?
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Lightbulbs and a battery circuit
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Phase constant sign (quick question)?
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Special Relativity -- elapsed time while traveling at 0.95c
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Why does the Block have an Acceleration Only Downwards
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Force does work -- Two masses and a pulley system....
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Finding work of a man running up stairs
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Two vehicles braking to avoid a collision
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Vector problem missing magnitude of two vectors
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Find the height, given work, time and mass (elevator)
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A point source isotropically emitting 10^8 fast nuetrons
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What is the EMF generated in a Straight Conductor?
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Question about charge induction
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Question on magnetic fields from wire
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Calculate the net force acting on the object in the diagram
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Rotational Inertia of a skateboarding wheels?
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Please prove that dW=-vdP where v is specific volume
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De Broglie wavelength and energy levels
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Special Relativity: Super-Novae light on earth
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Time for Bead to Lose Contact: Solving for Friction and Tension Forces
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Electric Field of Plate to a Point
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Derive vector that moves uniformly from one point to another
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Calculating Acceleration from Velocity and Distance: A Two-Part Problem
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Dynamics -- Newton's 2nd law with acceleration
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Calculating Pressure Inside a Water Mist Droplet
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Electric Charge and Force free body diagrams
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Rotational Motion - Conservation angular momentum
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What is the Orbit of Hydrogen Atom for an Electron at 734 km/s?
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Where can I find Similar Kinematics Questions?
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Semi-circle linear charge Electric Field
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Find distance from ramp at which skier lands
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Why Is the Normal Force the Same on Both Blocks in a Frictional System?
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Simple Harmonic Motion with Rotational Inertia
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Mass of Object Pulled by 40 HP Engine: 1,350 Kg
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How does a rod rotate due to gravity?
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Physics Archimedes Principle Distance an object sinks
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Draw a free body diagram for the electric force
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Two-Level Quantum System, Need help Finding State at time t
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Condition to not let the block descend
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Trying to understand vector conversion matrices
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Calculate temperature of a conductor
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