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.
Finding speed and distance of a train
  • keevo
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Solving a Spring/Force Problem: Mass, Spring Constant, and Acceleration
  • morrisj753
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Electric Force Textbook error?
  • quicksilver123
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8
Calculate the amount of work required to assemble a system of charges.
  • ditde
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Calculating Push Time for a Moving Crate
  • noob34
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Mass, speed, and force to find new speed and distance traveled during period.
  • keevo
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Gauss' Law Help don't even know where to start
  • miniMitts27
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Determining the electron speed in parallel plates
  • ProAgnusDei
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Find the resultant of these two force vectors using the following methods.
  • Brillntbrntt
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Solving an Acceleration Problem Involving a Super Ball
  • cmkc109
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Determine the final temperature of the mixture
  • Stomper123
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Will the Block Tip Over or Slip on an Incline?
  • morrisj753
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Amplitude Change in Oscillations with Varying Spring Constants
  • morrisj753
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4
Solving for time with an Overdamped Oscillator
  • NewtonsHead
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How large torque is needed for acceleration
  • bolskipolski
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Conservation of momentum problem
  • TheRedDevil18
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12
Discovering the Centre of Gravity: Tips and Techniques for Finding Balance
  • gazing600000
  • · Replies 9 ·
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9
Calculating Altitude of a Geosynchronous Satellite Orbiting Jupiter
  • Bashyboy
  • · Replies 5 ·
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5
Find the Velocity when accelration is not constant
  • Northbysouth
  • · Replies 9 ·
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9
Invariance of the y coordinate for a boost along the x axis
  • homerT
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1
Calculate resultants of two forces
  • zeralda21
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4
What is the final velocity of a stone thrown downwards from a roof?
  • Reth0407
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4
Curvilinear Motion: Rectangular Components
  • aaronfue
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Question about circuits (currents going into nodes)
  • doctordiddy
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Force on an airplane window, given altitude and area of the window.
  • monnapomona
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Finding Time and Distance in a Lion-Monkey Chase
  • Juan42
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Wheel attached to a spring with teeth
  • PhizKid
  • · Replies 23 ·
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F = MA 2011 # 14 (Creating a uniform sound)
  • SignaturePF
  • · Replies 9 ·
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9
Convert 1460 tons/hour to lb/sec: Solution
  • Howlz
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2
F = MA 2011 Exam # 8 (Fraction of an object above surface of water)
  • SignaturePF
  • · Replies 7 ·
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F = MA 2012 Exam # 19, 20 (Using Graphs)
  • SignaturePF
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3
What is the Wavelength of Scattered Radiation in a Compton Effect Experiment?
  • skg94
  • · Replies 7 ·
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7
Should Vout be negative or positive?
  • Clandry
  • · Replies 4 ·
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4
Air pressure at different room temperatures
  • awesomeness
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2
Finding net force using velocity graph?
  • jennaskim
  • · Replies 7 ·
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7
Adiabatic compression of ideal diatomic gas
  • Fizz_Geek
  • · Replies 9 ·
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9
Height of the water in a rotating water pot
  • Ezio3.1415
  • · Replies 13 ·
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13
Uniformly charged disk and the E field some distance Z from the center
  • anban
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4
Find Acceleration using Velocity and a given equation
  • destroctokon
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3
What is the correct way to interpret resistor bands in a circuit?
  • Clandry
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How Does Coulomb's Law Calculate Forces Between Two Point Charges?
  • sushi362
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3
How do you find the phase difference when given two sine equations and a X and t
  • randoreds
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Time, velocity, deceleration and the constant K
  • Northbysouth
  • · Replies 3 ·
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3
Diffraction limite of the human eye
  • oldspice1212
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Two Point Charges: Physics Problem Help
  • phunphysics2
  • · Replies 7 ·
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7
Natural Log on Radioactive Decay Formula
  • jucristina
  • · Replies 5 ·
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5
Net flux through a closed sphere
  • PeteyCoco
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Direction of force on the charge?
  • awilliam_3
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Ranking forces between charged particles
  • awilliam_3
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What is the final temperature of the mixture?
  • FlyDoc
  • · Replies 5 ·
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5
What Is the Phase Difference Between Two Speakers Emitting Sound Waves?
  • bored2death97
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Kinematics and acceleration problem
  • aaronfue
  • · Replies 9 ·
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9
Find the electric field of a square at a given point?
  • awilliam_3
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4
What Is the Relationship Between Voltage and Length in an Electrical Circuit?
  • GreenPrint
  • · Replies 14 ·
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How Do You Calculate the Moment in a Force-Couple System at a Pivot Point?
  • zeralda21
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Question on the derivation of Intensity
  • Blastrix91
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Light through 3 linear polarizers
  • Levi Tate
  • · Replies 25 ·
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Hooke's Law: How to find Amplitude
  • Absent.Crisis
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Fourier Series Representation of Signals (Proof)
  • Icetray
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X-ray question - frequencies and energies
  • Deathnote777
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Electric potential and Field Lines
  • Sigmeth
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Diffraction from a loud speaker
  • pmd28
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1-d kinematics food fight in space
  • tri5
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3
Electricity and magnetism ( word problems )
  • chipM
  • · Replies 12 ·
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12
Three Charges in an Electric Field
  • blue_lilly
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Proving length contraction exists
  • daselocution
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Another seemingly easy forces question
  • Element1674
  • · Replies 22 ·
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Find Cliff Height | Physics Homework
  • Toranc3
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Determine relative density qualitatively?
  • yoyopizza
  • · Replies 7 ·
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7
Simple Forces question I cannot seem to get
  • Element1674
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Raising temperature with no external work applied
  • BOYLANATOR
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Static Friction and minimum force
  • anne921
  • · Replies 12 ·
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Instantaneous Particle Velocity from Wave
  • rocapp
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Determine Orbital Period Of Satellite
  • Bashyboy
  • · Replies 10 ·
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Uniform Circular Motion Derivation of Radial Acceleration
  • hermes1908
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Total energy when potential graph is given
  • nhmllr
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Newtonian Mechanics - Particle in Motion with Air Resistance
  • derravaragh
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What is the velocity of a ball thrown from a building before it hits the ground?
  • racecar12
  • · Replies 12 ·
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De Broglie Waves: Understanding the Relationship Between Displacement and Time
  • Von Neumann
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Total gravitational potential energy of four objects
  • nhmllr
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Transforming double integrals into Polar coordinates
  • lmstaples
  • · Replies 13 ·
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Spring Forces: Equal Magnitude or Not?
  • Leong
  • · Replies 7 ·
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7
Electricity and Electric Field Questions
  • Mrclean214
  • · Replies 2 ·
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Second year physics homework, thought I was capable and now am simply frustrated
  • AloneWeSink
  • · Replies 1 ·
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Car Passing Truck: Solving for Time Required
  • Toranc3
  • · Replies 4 ·
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Tension in 3 Pulley System Homework
  • Pi-Bond
  • · Replies 18 ·
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How to Calculate Normal Force on an Inclined Surface with Tension Force?
  • FredericChopin
  • · Replies 6 ·
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How do you finish rearranging the Doppler shift formula
  • McWilliams
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How to find the acceleration with polar coordinates?
  • TonyTheTech
  • · Replies 1 ·
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Kinematics: finding the average acceleration
  • hrodger
  • · Replies 6 ·
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Velocity, Speed, and Time question
  • OUstudent
  • · Replies 9 ·
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9
Need Help with Vector Problem? Confused About Velocity and Angle?
  • njuice8
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I want to do an egg drop by submerging the egg in fluid. Which fluid is best?
  • pa5tabear
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What Is the Lowest Frequency for a Standing Wave in a Compound Wire?
  • Stealth849
  • · Replies 9 ·
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Finding E fields and potential given a hollow spherical conductor
  • SeanLikesRice
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Vertical Motion with Quadratic Air Resistance
  • Rumble
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Longitudinal Waves - are they very different?
  • Stealth849
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How to find the electric field coming from a sphere WITHOUT using Gauss' law?
  • anban
  • · Replies 3 ·
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How to find tension using integration
  • PhizKid
  • · Replies 11 ·
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Two Stage Rocket: Max Height Above Launch Pad
  • Toranc3
  • · Replies 3 ·
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3