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.
Two mirrors meet at a 135 degree angle.... (light ray question)
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Young's Modulus and the Poisson Ratio of Aluminium
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Feedback on the concepts surrounding pulley, ropes, friction
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Charge on a particle above a seemingly infinite charge plane
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What is the significance of height in a vertical spring system?
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Forces proportional to the sides of a quadrilateral result in a couple
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How Do You Solve a Block on a Slope with a Given Weight?
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Understanding Energy Conservation in Quantized Angular Momentum Transitions
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Atwood machine calculation for launching a pebble
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Ball on a rotating inclined plane
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Acceleration of a spring - mass system
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Answers to Your Questions: Q1 & Q2
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Using Kirchhoff's laws on this current division problem
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Inserting a dielectric between the plates of a parallel plate capacitor
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Drag force on a descending sphere
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Help me find the electric field vector
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Help with centripetal force and friction question please
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Minimum work needed to climb to the top of a peak
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What velocity does the particle need to get to point B?
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Finding Minimum A for Equilibrium in a Two Block Problem
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LR Circuit: Answers to Common Questions
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Help with this Ferris wheel rotational physics problem please
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Two Masses, a Pulley, and an Inclined Plane
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Estimate the initial velocity of the cars after the collision
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Electrostatic energy of concentric shells
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Help finding the equilibrium position of an electric field
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Pulley and Two Masses -- Newton's Law of Motion
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Net electric force of multiple charged particles in 3-d space
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Intensity of Stars and the Inverse Square Law Problem
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Time period of a harmonic oscillator
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Normalization of the wave function for the electron in a hydrogen atom
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Derivation of 3pt forward formula
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What is Kepler's Formula and How is it Used in Circular Motion and Gravitation?
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Forces: Pulley and Slope Constraining the Motion of two Masses
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How do you derive the units for momentum for photons
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How Do Electron and Proton Accelerations Compare Between Charged Plates?
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Solve this integral involving a quadratic and linear air resistance equation
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Solar Panels and Solar Radiation Flux Density Help - Very Confused
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Non-constant acceleration, solving for velocity
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Are All 10 Ohm Resistors in Parallel?
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How far can the person climb up the ladder before it starts sliding?
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The motion of a charged particle in a magnetic field
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Electric Potential inside an insulating sphere
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Physics lab report calculating resultant forces -- help please
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Hydrogen Emission Spectrum and Electron Energy Levels
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Block A Reaches Equilibrium: 92N Force
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Photoelectric Effect Graph and Work Function Questions
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What's the car's acceleration at a specific point?
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Calculating Tension on Strings: Results & Confusion
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Seemingly a related rates problem
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Relativity: Relativistic Kinematics and Dynamics
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Electron moving to the face of plate from depth d
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Tension in Rope Wrapped Around a Rod
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The question: Can nitrogen molecules escape from Europa and into space?
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What is the resulting force between the beam CB and E?
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Momentum and force multiple choice
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Maximum velocity of an electron emitted from lanthanum
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Cavity and coals: brightness and its consequences
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Calculating Time to Reach Highest Point in Theoretical Mechanics Problem
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Contradiction in the formation of an electric dipole
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Gravitational Field Strength at the equator and poles
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Interesting exercise: Torque, radiation, momentum and equilibrium
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Finding the reqiured fuel mass for a nuclear reaction
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A ball thrown at an angle above an inclined plane
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Required time and distance calculation of a shock wave
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Precipitation, Runoff and Channel Flows on Titan
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Energy of a configuration of two concentric spherical charged shells
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Potential Energy and raising a satellite from Earth into a Circular Orbit
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Gravitational Field Multiple Choice Help
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Force and change in momentum in an inelastic/elastic collision
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Equation for Fourth Force and its Line of Action?
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Solving Transcendental in Wien's Displacement law
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Lost and in Need of Ideas for Finding Inspiration
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Determining an object's velocity in cylindrical coordinates
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Question about work and finding the force of friction
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Potential due to a rod with a nonuniform charge density
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What is the focal length of the lens?
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Finding r of a Jovian-synchronous orbit and escape velocity
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Finding time from a velocity vector
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Having trouble with finding this displacement vector
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Maximum electric field at the surface of a Van de Graaff generator
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Finding the components of this velocity vector
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Difference in Gravitational Potential on the Moon
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Rearranging gravitational and centripetal equations to derive formulas
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Sound Wave Interference and Finding the Path Differences with Diagrams
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Help finding the vertical component of the reaction at C
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Question involving Young's modulus (mass hanging from a wire)
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Electric field due to a flat hollow disk
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Kinematics Question: A motorboat and a log in a stream
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Question regarding the Pressure of a gas flowing from a cylinder into balloons
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Hitting a rocket with a projectile
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How to find Tb and Moments 3D equilibrium of rigid bodies
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Beam with a rope - type of problem (Statics)
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What Should Manufacturers Specify: Peak Power or Average Power in Audio Systems?
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Ionization Energy: Solving for n and Why I Was Wrong
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Clarification about Mutual Inductance
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Find the altitude and the speed of two jets with Doppler Effect
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Electric Field of a Finite Cylinder
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Kinematics question: Stunt driver jumping his car from ramp to ramp
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Tension and reaction force in circular motion
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