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.
Mass on Bridge, Find Force of Friction when bridge is barely inclined
  • nickolaughagus
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Finding the Resonant frequency in an LC circuit
  • bsr25
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6
Circuit help - resistors and batteries in a network
  • lodovico
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7
Finding speed at half the height given initial velocity and mass
  • rockchalk1312
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Finding the ratio ω/ωo of an underdamped oscillator
  • HiggsBrozon
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Conservation of energy up a ramp.
  • macaholic
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1
Solve Rolling and Yoyo Problems: Answers Inside
  • modymaxx
  • · Replies 17 ·
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17
Frictional Forces and Stopping Distance in Physics
  • Susie babe
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1
True or False Questions on the Photoelectric Effect
  • kickingpaper
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Given electric field, find surface or charge density
  • fishingspree2
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1
Capacititive Circuit - discharging through lamp and resistor
  • CAF123
  • · Replies 20 ·
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20
Two Oppositely Charged Parallel Planes, Infinite In Extent
  • Bashyboy
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22
What Is the x Component of the Electric Field at a Point on the x-Axis?
  • Broem
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4
What is the Correct Angle for the Net Magnetic Force?
  • lovelyrwwr
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Calculating Acceleration = what?
  • Dancing_Solo
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5
Vibration problem given Force,length and mass
  • Equilibrium
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5
Capacitors are charged, disconnected from battery, and had plates swit
  • penguinnnnnx5
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5
Kinetic energy from plate A to plate B
  • hanna.eunice
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4
What is the Direction of Friction on a Sphere Placed on a Smooth Inclined Plane?
  • Saitama
  • · Replies 7 ·
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7
Horizontal force exerted by an engine
  • theBEAST
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3
Circuit Analysis: Current and Voltage Ranking
  • orangefruit
  • · Replies 10 ·
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10
Torque question need explaination
  • MikeMai
  • · Replies 2 ·
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2
Work done on a spring by an ideal gas
  • physninj
  • · Replies 16 ·
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16
Velocity to Distance Time Graph?
  • kencamarador
  • · Replies 1 ·
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1
Parallel Axis Theorem | Kinetic and Potential Energy
  • Lahooty
  • · Replies 1 ·
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1
Conservation of Energy in Orbits
  • forcefrom
  • · Replies 13 ·
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13
How does friction affect the middle box in a double tension problem?
  • greenir
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1
How far is the ray displaced as a result of traveling through the gla
  • lizaliiu
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2
Calculate the speed of the Cylinder in the pulley system
  • Northbysouth
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2
Electric Fields Cancelling Out?
  • Bashyboy
  • · Replies 4 ·
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4
What is the total horizontal force on a constricted pipe with water flow?
  • danielakkerma
  • · Replies 25 ·
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Calculate the energy spread of the Fe-57 first excited state
  • richyw
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2
Find the current in each resistor.
  • whynot314
  • · Replies 2 ·
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2
Question on bernoulli's equation
  • theBEAST
  • · Replies 2 ·
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2
Levitating wire in magnetic field.
  • SherlockOhms
  • · Replies 4 ·
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4
When landing after a spectacular somersault
  • chacheck
  • · Replies 1 ·
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1
Gravitational field strength (ratios)
  • HerroFish
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3
How High Can a Pebble Flung from a Car Tire Reach?
  • gmianosi
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2
Electric Flux and Charge Distribution in a Cube with Uniform Electric Fields
  • Bashyboy
  • · Replies 10 ·
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10
Calculating Copper Volume for Hollow Spherical Shell
  • babysnatcher
  • · Replies 3 ·
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3
Angular momentum of excited electron in hydrogen
  • Fluxthroughme
  • · Replies 9 ·
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9
Integration Intuition for work between x1 and x2
  • Joshb60796
  • · Replies 4 ·
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4
Determining on what type of Motion to use on a Position Time Graph?
  • kencamarador
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1
Calculating Torque for (-2m, 0, 4m) & 6N Force
  • ShizukaSm
  • · Replies 8 ·
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8
Electric Force of charges A,B,C on another charge
  • RichMarrem
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2
Elastic energy and force on an object
  • Joshb60796
  • · Replies 14 ·
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14
How Is the Proton's Radius of Curvature Determined in a Magnetic Field?
  • Gee Wiz
  • · Replies 28 ·
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Displacement v Time graph for a wave
  • trollcast
  • · Replies 7 ·
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7
How Do You Calculate the Time Period of SHM for a Liquid in a U-Shaped Tube?
  • cyb3r
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1
How can potential energy functions be used to model a system's motion?
  • LovePhys
  • · Replies 9 ·
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9
How Do Potential Differences Distribute Across Series Capacitors?
  • Renaldo
  • · Replies 9 ·
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9
What is the steady state voltage across the capacitor in this open circuit?
  • pyroknife
  • · Replies 5 ·
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5
Acceleration of a Falling Object from Average Velocities
  • ErinSK
  • · Replies 6 ·
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6
Transistors and boolean expression
  • charlies1902
  • · Replies 12 ·
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How is this array of capacitors connected: Serie or parallel?
  • sergioro
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4
Circuits with Diode: Understanding Ideal Diodes and Their Behavior
  • Clandry
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Variations of electrostatic potential energy
  • Poley
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2
Is the Voltage at Point A Still 5V with V_in at 0 in a Transistor-Diode Circuit?
  • Clandry
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Is Voltage Across Always a Magnitude?
  • pyroknife
  • · Replies 3 ·
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Can you verify my Physics work please?
  • CivilSigma
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Using gradient values of a graph to determine angular acceleration
  • vodkasoup
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5
Find the constant c given quadratic equation F=
  • rockchalk1312
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2
Calculating work done by helicopter/gravity, kinetic energy and speed?
  • rockchalk1312
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Uniformly charged distributions (Electricity)
  • ehabmozart
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5
Work done by a spring on a block when released from 14cm?
  • rockchalk1312
  • · Replies 3 ·
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Relation between a photon's energy and momentum
  • Fluxthroughme
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Relative Velocity of Balls: Solving for t=1 sec
  • Litcyb
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Falling elevator energy conservation
  • kopinator
  • · Replies 12 ·
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Calculating Work with Vector Notation
  • Joshb60796
  • · Replies 12 ·
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How Is Charge Calculated in a Two Loop RC Circuit After the Switch Opens?
  • Gee Wiz
  • · Replies 36 ·
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Conceptual physics homework, easy, but understanding
  • knnox
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How would water vapor contamination affect PV=nRT
  • skate_nerd
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Find the maximum deflection of the spring
  • Northbysouth
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Is the 'Method' written in present or past tense?
  • ZedCar
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Help with Newton's Law Acceleration Problem
  • njt84572
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Centripetal force, this is confusing. Why?
  • x86
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3
Find the point where the eletrostatic force is maximum. (With drawing)
  • tsuwal
  • · Replies 7 ·
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7
Particle motion in a Magnetic Field 1
  • Gee Wiz
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Supposly simple balistic motion prob
  • assaftolko
  • · Replies 6 ·
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Understanding Spring Length in the Center-of-Mass Frame
  • Saitama
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Find angle at which the projectile hits
  • CollegeStudent
  • · Replies 6 ·
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6
Amplitude in a simple pendulum - angle or distance?
  • shmurr
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Three rescuers pulling horizontally on a safety net to keep it taut
  • Sneakatone
  • · Replies 22 ·
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How Is Light Intensity Affected by Multiple Polarizing Filters?
  • alittlelost
  • · Replies 5 ·
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Calculate the moment when the pedal
  • wally25feb
  • · Replies 8 ·
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How Do Relative Velocities Determine Collision Courses?
  • Woolyabyss
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3
Electric Field On A Point Charge Due To A Uniformly Charged Rod
  • Unix
  • · Replies 4 ·
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Thermodynamics: Heating a Rectangular Box
  • spockjones20
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What is the Correct Setup for River Relative Velocity Homework?
  • Toranc3
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Is Momentum and Kinetic Energy Conserved in Collisions?
  • Habibrobert
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How Does Inserting a Dielectric Affect a Charged Capacitor?
  • CAF123
  • · Replies 10 ·
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Electric Field due to a charged conducting sheet
  • vodkasoup
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Question about the electric field
  • fishingspree2
  • · Replies 2 ·
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Calculating Force for Spark Plug Installation
  • dragon18
  • · Replies 4 ·
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Positive pion decay and kinetic energy
  • justtram13
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How to find acceleration from given 2 masses and acceleration?
  • Sneakatone
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Internal half of the fresnel zone
  • harrydj
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Max Rotation Rate of a Slowing Turntable
  • Dan22
  • · Replies 1 ·
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Science fair - Formula for friction to thermal energy?
  • AtomicNucleus
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Solve Distance Problem: Boy Riding Bicycle for 30km
  • Equilibrium
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