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.
How Do You Calculate Motion and Forces in Physics Problems?
  • katiegerster
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Physics circular motion and gravity help please
  • katiegerster
  • · Replies 7 ·
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Circular motion and gravity help
  • katiegerster
  • · Replies 5 ·
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Mass of an accelerated electron by 31 kV
  • Prometium
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Physics help, circular motion and gravity
  • katiegerster
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How Do Voltage Arrows Indicate Polarity?
  • cytochrome
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Frictional Force: Causes & Effect on Rotational Flywheel & Pulley
  • DerekWeir29
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How Does A Ship Float on A Glass Of Water
  • rittzlle
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Calculating tension on 3 wires/strings
  • anonymous812
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Bypass time of satelite arround Mars
  • antoman
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10
I want to know about electricity.i am facing a huge difficulty in it.
  • Shashank tekri
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3
Why there are so many positive and negative ions in N and P types?
  • anhnha
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Faraday's Law - very tricky question
  • assaftolko
  • · Replies 23 ·
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Electric field inside PN junction in equilibrium
  • anhnha
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4
How Do You Calculate the Acceleration of a Pulley System with Air Resistance?
  • Evolution17
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5
Calculating Electric Potential Difference for Machinery Operation
  • andy.tsang
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Puck sliding accross ice W/ friction and incline
  • Evolution17
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3
Velocity Vector in Polar Coordinates (Kleppner p.30)
  • Von Neumann
  • · Replies 8 ·
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8
Solving for n in a Summation Series
  • mattyh3
  • · Replies 17 ·
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Whic topic can I study to solve the following mechanics problem?
  • Ein Krieger
  • · Replies 4 ·
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4
Relativity along an axis in an inertial frame
  • ZanyCat
  • · Replies 7 ·
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7
Why is my amplifier not working with my speaker?
  • MacDaddio
  • · Replies 26 ·
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Tricky V I Graph Need help please
  • Steve12345
  • · Replies 5 ·
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5
Electric field inside a conductor
  • anhnha
  • · Replies 11 ·
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11
Finding fmax in Thin Lens Refraction Problem
  • icedragon
  • · Replies 5 ·
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5
What is the Concept of Drift Velocity in Electrons?
  • anhnha
  • · Replies 6 ·
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Potential at centre of cylinder
  • Saitama
  • · Replies 40 ·
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Prove this result Electrostatics
  • utkarshakash
  • · Replies 12 ·
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12
Current reference direction confusion
  • cytochrome
  • · Replies 2 ·
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2
Show how gravitational potential varies between the earth and the moon
  • question dude
  • · Replies 4 ·
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4
Basic physics confusion in my structure
  • x86
  • · Replies 7 ·
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7
Confusion; one block on top of another block
  • x86
  • · Replies 7 ·
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7
How does earthing affect the distribution of charges on metal plates?
  • Tanya Sharma
  • · Replies 15 ·
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Maximizing Heat Pump Efficiency with Constant Entropy
  • Saitama
  • · Replies 32 ·
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Box Slipping and Tipping: Finding the Critical Force P
  • zeralda21
  • · Replies 8 ·
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Explosive separation with conservation of momentum and energy
  • bkraabel
  • · Replies 2 ·
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2
Finding the direction and velocity of wind using vectors question
  • shy9488
  • · Replies 1 ·
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1
Calculating Work and Potential Energy in a System of Point Charges
  • carnot cycle
  • · Replies 12 ·
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Equations of motion ( vectors )
  • sambarbarian
  • · Replies 6 ·
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6
Magnetic field strength in two wires
  • swim-student
  • · Replies 1 ·
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3 dimensional cube finding an angle
  • Toranc3
  • · Replies 2 ·
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Tough motion question with acceleration, time and distance
  • incogserv
  • · Replies 6 ·
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6
Magnetic Force on a Power Line - Calculating Magnitude and Direction
  • Annette123
  • · Replies 10 ·
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Simple Harmonic Motion: Displacement after s seconds
  • mexqwerty
  • · Replies 10 ·
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Brakes on a car-Energy related question
  • alingy1
  • · Replies 3 ·
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3
Calculating Maximum Voltage in a circuit.
  • QuickSkope
  • · Replies 17 ·
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Doppler Shift/ Doppler effect HELP
  • Roaku
  • · Replies 5 ·
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5
Magnetic field problem with two wires -
  • Annette123
  • · Replies 8 ·
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8
Physics Help- Projectile Motion?
  • Animalgirl27
  • · Replies 5 ·
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Angular Velocity and Torque homework question
  • linds43
  • · Replies 12 ·
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Transforming momentum between inertial reference frames
  • bkraabel
  • · Replies 3 ·
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3
Damped Electromagnetic Oscillations
  • anthonych414
  • · Replies 5 ·
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I really deriving the equation for this?
  • fitnessdaisy
  • · Replies 1 ·
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Bernoulli's equation and water pipe
  • squires80
  • · Replies 6 ·
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Can Conservative Forces Be Neglected During Collision Analysis?
  • Tanya Sharma
  • · Replies 38 ·
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Friction question, maximum incline
  • Kinhew93
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Floating Iceberg Displacing 723m³ of Water
  • Felafel
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Induced EMF in Rotating Magnetic Field with B=0.5B0z^
  • assaftolko
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Heat gained and lost by aluminium and water in thermal equilibrium
  • hkor
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What is the Velocity at the Bottom of a Roller Coaster with Given Parameters?
  • nohkie
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Why Does the Mass Take 3.54s to Reach the Floor in This Torque Problem?
  • AMacias2008
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Physical interpretations of Schrodingers equation
  • Quantum_man
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Calculating the height of the water column
  • taeyeong14
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How to Calculate the Volume of a Cylinder Using Ideal Gas Equation?
  • marcio
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Conservation of Momentum and Kinetic Energy in Inelastic Collisions
  • x86
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Physics Homework Help - Force when kicking a ball
  • Superteemo
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Friction and Kinematics: Solving for Minimum Time on a Bridge
  • RandomGuy1
  • · Replies 4 ·
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Deriving Projectile Motion Equations
  • rakeru
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Dot Product Clarification (Kleppner & Kolenkow p.9)
  • Von Neumann
  • · Replies 4 ·
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Change in u and h is for a piston cylinder device.
  • nothingkwt
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How Do You Calculate the Final Speeds of Pool Balls After Collision?
  • Kennedy111
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Which Ramp is Easier to Raise a 2kg Object? Find Out!
  • adjacent
  • · Replies 20 ·
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Bucket being lowered vertically by a rope
  • e-zero
  • · Replies 9 ·
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What Does a Magnet Period of 10cm Mean?
  • clarinethero
  • · Replies 3 ·
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Required force to stop a moving object.
  • aziiri
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Energy stored in capacitor when connected or disconnected from battery
  • FollowTheFez
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Length of time to burn fuel in a fusion reactor
  • clarinethero
  • · Replies 4 ·
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How do I calculate g-forces on a roller coaster?
  • blackojacko
  • · Replies 3 ·
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3
Electromagnetism, finding magnetic field strength
  • physics604
  • · Replies 3 ·
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3
Magnetic Fields from Two Infinite Sheets of Current
  • pbstriker38
  • · Replies 5 ·
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Electromagnetism, current in coil
  • physics604
  • · Replies 4 ·
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Solving for Mirror Displacement in a Michelson Interferometer
  • Ryoblck
  • · Replies 1 ·
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Electromagnetism, finding velocity and acceleration
  • physics604
  • · Replies 2 ·
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Intensity after different polarizers
  • 567179551
  • · Replies 7 ·
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Can you help me find what a = on this problem?
  • shin777
  • · Replies 10 ·
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Very Vague Graphing Motion Problem
  • rakeru
  • · Replies 3 ·
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How Are Eigenstates Determined for a Given Hamiltonian Matrix?
  • Denver Dang
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2 Questions - Heating room air, and fuel combustion efficiency
  • skrelt
  • · Replies 3 ·
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What is the weight and scale reading during elevator acceleration?
  • e-zero
  • · Replies 10 ·
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How do you calculate the energy delivered by a capacitor
  • sefsybabe
  • · Replies 7 ·
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Final velocity with air resistance
  • enanthate
  • · Replies 5 ·
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Beam splitter with single photons
  • physmatics
  • · Replies 1 ·
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Was My Prof. Wrong? Temperature & Potency Questions Answered
  • Dante69x
  • · Replies 1 ·
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Can Energy Truly Displace Bodies in Motion?
  • susskind99
  • · Replies 20 ·
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Kinetic Energy and Moment of Inertia
  • RuthlessTB
  • · Replies 1 ·
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Single photons traversing a beam splitter
  • physmatics
  • · Replies 1 ·
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Waves question involving 3 people in a tunnel
  • bookerdewitt
  • · Replies 4 ·
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Torque, Momentum and Reflection
  • jaumzaum
  • · Replies 1 ·
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What Causes the Most Significant Diffraction Effect for Grating Diffraction?
  • songoku
  • · Replies 13 ·
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Energy loss and inclined planes
  • Dongorgon
  • · Replies 1 ·
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