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.
Capacitor and displacement current.
  • altamashghazi
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Calculating Wavelength and Central Maximum Width Using Single Slit Equations
  • alittlelost
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Projectile Motion from table of values.
  • angisgon
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12
Potential difference in rod rotating in magnetic field
  • kbar1
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2
Quick Question Regarding Smooth Inclined Plan
  • FaraDazed
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Difference between Electric Potential energy and Potential energy
  • SiriusAboutAstronomy
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3
What is the reaction force to F(net) in Newton's 3rd law?
  • student34
  • · Replies 21 ·
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How Many People Can an Elevator Hold Without Breaking the Cable?
  • Voltrical
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Kinetic energy and speed of system of charges (electric potential)
  • jpdelavin
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Equilibrium under the action of concurrent forces
  • jimmyly
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Gauss' Law problem Help please infinite sheet with charge density?
  • nchin
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Voltage difference, line integral
  • kougou
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Find gravity on an unknown planet
  • dragon18
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Finding Electric Field of Two Charges
  • erok81
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Is f(x,t)=exp[-i(ax+bt)^2] a harmonic wave?
  • reedc15
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9
Finding the Relationship Between Net Work and Change in Kinetic Energy
  • Yosty22
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Find the current through the 100 Ohm resistor:
  • Jormungandr
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What is the phase difference between two particles in stationary waves?
  • question dude
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Circular Motion of a turntable spinning counterclockwise
  • Dan22
  • · Replies 17 ·
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17
When will the sled attain this speed?
  • Sneakatone
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6
Help with practice test problem curved rod with charge density?
  • nchin
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Superposition principle? How to algebraically add up two equations?
  • nchin
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Earth's centripetal acceleration around the Sun
  • hrice
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Calculate gravitational acceleration in a vacuum?
  • rockchalk1312
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2
Finding forces on a car rounding a curve
  • baird.lindsay
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2
Rough Inclined Plane - Find Coefficient of friction
  • FaraDazed
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3
Find the mass of m1 on an inclined pulley system
  • IcyDuck
  • · Replies 5 ·
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5
Understanding Elastic Collisions in Two Dimensions
  • cp255
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Finding frictional force towing a car up a hill
  • baird.lindsay
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Deriving Stefan's fourth-power law
  • efekwulsemmay
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The Specific Heat of a Free-Electron gas calculated by using the Fermi
  • nboogerz
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Air temperature and relative humidity
  • salma17
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How does friction causes centripetal acceleration?
  • SecretSnow
  • · Replies 6 ·
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6
Newtons 3rd law with a truck hitting a person
  • Painguy
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3
Metal rod rotating in magnetic induction.
  • amk_dbz
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2
Solving Ray Optics Problem 2: Mirror Positions and Image Formation
  • thunderhadron
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Pre Lab, how to find uncertainty
  • Habibrobert
  • · Replies 4 ·
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4
Two blocks attached by a string(dynamic)
  • MikeMai
  • · Replies 3 ·
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3
Box on a table connected by cable(dynamic)
  • MikeMai
  • · Replies 1 ·
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1
Simple Harmonic Motion: Mass on a Spring Homework Solution
  • bmb2009
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1
Electrostatic Force of a Triangle
  • dolpho
  • · Replies 6 ·
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6
Calculating the Potential Energy of Quarks in the Quark Model of the Neutron
  • fizzickz
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Net Force on a Descending Man Question
  • student34
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Calculate the force on a particle from magnetic field of infinite wire
  • eviljay
  • · Replies 5 ·
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Combining two different sound intensities
  • ebmather
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5
A 10kg block on a table conected to a 78kg mass (find acceleration)
  • Zsmitty3
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Can someone check my answers to these four wave questions
  • question dude
  • · Replies 4 ·
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4
Rope Sliding Over Friction less Peg
  • bmb2009
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Relationship between Wave Velocity and Displacement in a String
  • BareFootKing
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8
Derive equations for Electric Field/Electric Potential
  • Renaldo
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Waves in air in a tube that is closed
  • the-pal
  • · Replies 7 ·
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7
Force Applied to an Object with friction
  • EnDev
  • · Replies 12 ·
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Magnitude and Direction of Electric Fields
  • sarahaha44
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Force at an Angle: Solving for Acceleration & Normal Force
  • EnDev
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Gauss law for semi-infinite sheet of charge
  • fishingspree2
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Calculating Work Done by Non-Constant Force Using Integration
  • kopinator
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1d free particle. How do I find the solution to the DE?
  • richyw
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How Does Kinetic Friction Affect Skid Mark Length and Initial Car Speed?
  • Robertoalva
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How to Avoid Common Mistakes in Solving Forces Problems?
  • FaraDazed
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Physics Test Review: Tips & Tricks for Solving Problems
  • thwolfe
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Calculate force in english units
  • ENGR_student
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True or False What a graph of velocity vs time tells us about force
  • idllotsaroms
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Simple electrostatic fields questions
  • lovelyrwwr
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Person throws ball in elevator problem
  • CAF123
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Find r'' and Theta''for the Spaceship
  • Northbysouth
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Dynamics help: variable acceleration and angular velocity
  • medynamics
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Diameter of a stream of water from a faucet
  • sluo
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Constant Acceleration and Resolution of Forces
  • FaraDazed
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What direction does light move in an ancient shrine?
  • deltafee
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Calculating Total Moment of Force F1 about Point A
  • United
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Why Does the Atwood Machine Calculation Yield the Same Tension on Both Sides?
  • Jaimie
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How Fast Does a Block Slide Down a Ramp with Friction?
  • vic05
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Projectile motion ball thrown down vertically
  • xxascendantxx
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Particle confined to a potential under a force
  • CAF123
  • · Replies 17 ·
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Electric Force and Field Strength Problem
  • reinajonas
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Velocity/displacement/time problem
  • xotash
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Molar volume of gas in function of temperature and pressure
  • damabo
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Conservation of Energy and the Race between Different Shapes on an Inclined Ramp
  • robertmatthew
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Charge for a Grain of Dust on the Moon?
  • m00nbeam360
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Atwood's Machine, massive pulley and upwards force acting upon it.
  • DavidDante
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How Do You Calculate Capacitance in a Series RC Circuit?
  • SereneKi
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How do you calculate the moment of a force about a point?
  • United
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Three Point Charges, find the electric force exerted
  • m00nbeam360
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Thermodynamics in a refridgerator
  • Saxby
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Solving for gravitational pull
  • jaff
  • · Replies 3 ·
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Electrical Generator and rotating coil
  • SereneKi
  • · Replies 8 ·
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Force on a car passenger during acceleration.
  • Zsmitty3
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Error propogation in trig functions
  • richyw
  • · Replies 10 ·
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Conservation of Momentum question (find final velocities)
  • d3nat
  • · Replies 13 ·
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Boundry conditions on a string with a hoop at one end
  • BareFootKing
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Suppose the mass of the Earth were doubled (Physics 12)
  • StaticWaffles
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Help finding distance d for particle to travel
  • asdf12312
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Calculate electric field at position x given ρ and thickness d?
  • asdf12312
  • · Replies 9 ·
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Concentric Cylindrical Conducting Shells
  • maceng7
  • · Replies 1 ·
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Kinematics/Projectile Motion Question?
  • Stanc
  • · Replies 5 ·
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Attempting to find tension force with electric fields
  • mfgrape123
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Measuring distances with diffraction experiment
  • MrEinstein
  • · Replies 4 ·
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What Factors Affect the Natural Frequency of a Wineglass?
  • 06mangro
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How Do You Solve Electric Circuit Problems with Multiple Voltage Sources?
  • alexmath
  • · Replies 3 ·
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Moment around a point in 3D: Understanding Vector Calculations
  • jonjacson
  • · Replies 8 ·
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