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.
Weird wording, can't understand what they want
  • Feodalherren
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Tension and Friction with Acceleration
  • jonnyboy1234
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Coloumbs law with inverse cubic
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Determine electric field at x=1m
  • jaydnul
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Physics II: Electricity/Magnetism Conceptual Help
  • Baumer8993
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Calculating Voltage in an Electromagnet with Known Inductance and Current
  • Sastronaut
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Position,velocity, speed, direction of travel of an electron
  • nerdalert21
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Vector position, velocity, coordinates and speed
  • nerdalert21
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Free-hanging string with 4 attached masses
  • Nikitin
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How Does a Uniform Electric Field Affect Charge Density Distribution?
  • smantics
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Question between friends - How long to travel 1 light year?
  • MartinButler88
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How do I calculate velocity of an object if I know its Lorentz factor?
  • Gurh
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Exponential Decay function in NMR
  • Bubble22
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How Does Relativity Affect Bullet Travel Time in a Moving Rocket?
  • dmayers94
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What Happens to the Power Output of Bulbs in Series When Voltage is Halved?
  • nil1996
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Calculating useful force or force at an angle
  • richard9678
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Finding Normal Reaction and Friction Force on a Ladder Leaning Against a Wall
  • kell
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Newton's law of universal gravitation
  • Permanence
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Find Angle to Throw Snowball for 20m Distance | Kinematics
  • GuN
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Electric field on a charge some height above the center of a disc
  • PhizKid
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Charge Volume Density To Charge Per Unit Length
  • Baumer8993
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Find Electric Field Around a Non-Conducting Sphere
  • tuggler
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Stopping Potential and kinetic potential
  • kougou
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Double slit experiment intensity distribution
  • richyw
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What Are the Spring and Damping Constants for a Damped Oscillator?
  • jbrussell93
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What is the Electric Field at Position D on the Equipotential Surfaces?
  • 7411
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Why do two opposing currents cancel each other out perfectly in Ampere's Law?
  • PsychonautQQ
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Why is my resultant displacement magnitude not matching my calculations?
  • kellyb1ll
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How Do You Calculate Particle 2's Velocity in Particle 1's Rest Frame?
  • sigma_
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Dielectric Charges: Polarization or Dielectricity?
  • Yosty22
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Trouble understanding aspect of SHM
  • PsychonautQQ
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How Does Illuminance Change With Distance in Physics Experiments?
  • garet122
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Running Kinematics: Analyzing Speed and Acceleration in a Marathon
  • physicsnobrain
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Pole Vaulting Kinematics Problem
  • physicsnobrain
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Motion Diagram of Galileo's Ball Drop from Leaning Tower of Pisa
  • Sylis
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Calculating Electric Field at Point P above Infinite Sheet
  • kopinator
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Finding coordinates after finding the acceleration of an object
  • nerdalert21
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Finding the Time: Kinetic Friction Lab Question
  • jlewallen18
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Acceleration, constant velocity, deceleration
  • warsno
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How High and Far Does a Soccer Ball Travel When Kicked?
  • Psyguy22
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Cube of Resistor Problem - Nice one
  • luiseduardo
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Describing A Mathematical Result
  • Bashyboy
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Maximum range of an object projected from a height h
  • rajathjackson
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Draw Displacement Vectors: A+B | Motion Diagrams
  • Sylis
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What Is the Weight Attached in a Pulley Traction System in Equilibrium?
  • Missnomer
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What is the uncertainty in area and volume for a right circular cone?
  • Panphobia
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Velocity when acceleration is half-Olympiad Problem
  • rajathjackson
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Problems with calculating the acceleration
  • PhyIsOhSoHard
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Projectile Motion (find theta)
  • bengavinb20
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Understanding Rotation Angles and Vectors: Clarification on a Confusing Question
  • Panphobia
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Calculating Maximum Range of a Catapulted Rock
  • Gank
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Am I missing anything in this box problem?
  • tibug
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Photoelectric Effect and stopping potential
  • Turion
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Maximum Deviation Angle in Elastic Collision
  • Saitama
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How can I prove i = j = k = 1 in Peter's energy equation?
  • Panphobia
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Need help with the order of electric potential
  • NasuSama
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Calculating Electron Force in a Two Point Charge System - Physics Homework Help
  • NasuSama
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Finding the Minimum θ for Rock Thrown at Speed v_0
  • darksyesider
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What is the Direction of Force in a Falling Object's Free-Body Diagram?
  • Ascendant78
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Calculating Mass of a Structural I-beam
  • MattWakes
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Position Vector: Homework Solution Needed
  • tchouhan
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How Long Will It Take Sam to Catch Up to John?
  • harujina
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When can you assume dynamic equilibrium?
  • Coop
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Finding an increase in depth, pressure and thrust
  • Woolyabyss
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Difference in Potential Energy between two Reservoirs
  • catsandtrees
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Why is my book using different equations to solve for velocity?
  • outxbreak
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Static Equilibrium Two Pulleys and Weights With Ring
  • 012anonymousx
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Finding x and y components of a vector in the fourth quadrant
  • Sylis
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Correct formula to use for potential difference?
  • outxbreak
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Classical block on inclined plane
  • cassinova
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Solve King Arthur's Rock Launching Problem
  • Sylis
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Block on incline with air resistance, no friction
  • inferno298
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How Do You Find Acceleration and Total Distance in a Car's Journey?
  • Xidike
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Question regarding basic dynamics and forces involved?
  • Ascendant78
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Finding the Velocity and Acceleration of a Car in Circular Motion
  • mrcheeses
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What is the velocity and direction of a transverse wave on a string?
  • dwn
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Charged, Insulating Sheet question
  • StudentA1
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How to think about physics? / How to approach a difficult problem?
  • azukibean
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Diving Board Jump: Analyzing Velocity and Height
  • Jabababa
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Why Is the Doppler Shift Zero When Both Vehicles Travel at the Same Speed?
  • dwn
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Approximate impact force upon landing with parachute
  • BCHurricane89
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How to find the distance of a satellite with respect to the moon
  • starplaya
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Function of force with respect to v & t; find final v and distance
  • oddjobmj
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Spring block system with friction
  • Saitama
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Can Someone Help Me Understand Bernoulli's Equation for My Physics Course?
  • ttang94
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Constant radial and angular velocity; find magnitude of acceleration.
  • oddjobmj
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Lorentz Contraction of Moving Line of Charge
  • leonardthecow
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How does torque help us understand the motion of objects?
  • bloupo
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Calculating Spectral Range of Blackbody Radiation Intensity
  • kbeach
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Finding Electric Field from an insulating sphere
  • DrKARMA
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Solve Energy Homework: Understand (2) & (3) of 1 J = 1 N m
  • richard9678
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What is the charge density in a one-dimensional electric field?
  • PsychonautQQ
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Simple circuit - parallel resistors
  • B4ssHunter
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Find electric field on a point due to a charged arc.
  • cgar666
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What is the speed of the stone just before it hits the ocean?
  • DocDot
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Rate of Deceleration & Time Required
  • dgsigala
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Electric Forces Homework: Calculate Two Point Charges Using Coulomb's Law
  • dwn
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Calculate attractive force between Cu2+ and O2- ions.
  • robertjordan
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Show that this equation is homogeneous. PLEASE HELP, relatively simple
  • MisterOrange
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Finding the energy of an electron from n=4 to n=2?
  • robertjordan
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