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.
Is Epicyclic an Accurate Term for the Moon's Orbit Around the Sun?
  • Minki
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Experimental calculated values and Uncertainties
  • Yoshimine
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Buoyancy (Archimede's Principle) Problem
  • Von Neumann
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Pedagogical Machine: Solving Homework Equations
  • PhizKid
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Quick Projectile Motion Problem
  • quicksilver123
  • · Replies 3 ·
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Is the Conservation of Energy Solution Correct?
  • Ammar w
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Quick question about compass/degree
  • personguything
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Interference and slits question
  • doctordiddy
  • · Replies 1 ·
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Rotational dynamics, semicircular arc
  • Saitama
  • · Replies 5 ·
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What Is the Velocity of a Ladybug on a Moving Chair Relative to the Ground?
  • quicksilver123
  • · Replies 4 ·
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Is it Possible to Turn a Car Without Skidding?
  • PhizKid
  • · Replies 1 ·
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How Is Work and Kinetic Energy Calculated in Physics Problems?
  • Junebugg
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Solving for I1/I2 with Current Divider Rule: Help Needed!
  • freshbox
  • · Replies 8 ·
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Tether rotation device in space problem
  • nhmllr
  • · Replies 3 ·
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When does the small angle approximation deviate by more than 1%?
  • Airsteve0
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Acceleration of Proton (Kinetic Energy & relativity)
  • Lauren12
  • · Replies 2 ·
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What's the volume of water required inside the lock if
  • davekardle
  • · Replies 8 ·
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Black Box, Time-Dependent Current & Potential Rise
  • rbrayana123
  • · Replies 14 ·
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Angular momentum; turntable problem
  • physicsstdnt
  • · Replies 2 ·
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What Causes a Pebble to Slip on a Rotating Wheel?
  • PhizKid
  • · Replies 2 ·
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How do you find the number of electrons given a mass fo the object?
  • Bwilli
  • · Replies 3 ·
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Finding Tension in String Connected to Electrically Repelled Sphere
  • velouria131
  • · Replies 3 ·
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What is the shortest wavelength photon emitted in a hydrogen atom?
  • Kennedy111
  • · Replies 4 ·
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What actually happens when slicing occurs
  • sgstudent
  • · Replies 7 ·
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Calculating Energy Levels and Wavelengths in the Hydrogen Atom
  • Kennedy111
  • · Replies 1 ·
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Finding velocity of a vehicle using Doppler Shift for sound
  • nawg04
  • · Replies 4 ·
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SHM r/R Ratio Question: Solving for Simple Harmonic Motion in a Fixed Trough"
  • Saitama
  • · Replies 55 ·
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Electron's Energy After Absorbing A Photon
  • Kennedy111
  • · Replies 1 ·
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Conversation of energy to determine angular velocity
  • deltaOmega
  • · Replies 5 ·
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5
Tension in a circular wire with force radiating outwards
  • hyperddude
  • · Replies 3 ·
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Maximum speed of an object after a spring
  • liamtcarroll
  • · Replies 5 ·
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5
Deriving equation for minimum height in projectile motion with two give me's
  • Ceeerson
  • · Replies 13 ·
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Millikan Oil Drop Experiment Question
  • Kennedy111
  • · Replies 4 ·
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4
Relationship between length of rubber beam and time to come to rest
  • never4getthis
  • · Replies 1 ·
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Tension of rope between two trees
  • PhizKid
  • · Replies 2 ·
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AP PHYSICS ~ Thermal Properties ~ A heat transfer of
  • Silverbolt
  • · Replies 1 ·
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What is the final temperature of a lead ball dropped from a height of 4.57 m?
  • Silverbolt
  • · Replies 4 ·
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Power dissipated by a resistor in parallel
  • anban
  • · Replies 6 ·
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6
How Fast is a Particle Moving at 15 Meters in Two Dimensions?
  • im4rheal
  • · Replies 14 ·
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Confusion with Friction and mechanical energy
  • DunWorry
  • · Replies 13 ·
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Why Doesn't the Energy Method Require Friction for Rolling Objects?
  • RRachev
  • · Replies 6 ·
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How Does a Particle's Position Change with Acceleration in the XY Plane?
  • im4rheal
  • · Replies 1 ·
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Adding vectors with the component method
  • personguything
  • · Replies 2 ·
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Constant acceleration problem to find the speed of a rocket
  • mahrap
  • · Replies 3 ·
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Torques in equilibrium w/ angle
  • supercherrie
  • · Replies 1 ·
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Differences between heat capacity and thermal conductivity/convection
  • sgstudent
  • · Replies 9 ·
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9
Meter used before digital meter?
  • kooombaya
  • · Replies 15 ·
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Solve Rotational Dynamics Homework: Hollow Cylinder, Weight, String
  • golanor
  • · Replies 10 ·
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When Can the Combined Homework Statement Be Applied for Pressure Calculation?
  • sgstudent
  • · Replies 15 ·
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Working out EMF and internal resistance
  • PhysStudent81
  • · Replies 3 ·
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Calculating the mass of an object pivoting on a point
  • agm1984
  • · Replies 7 ·
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Point Where Electric Field=0 (3 point charges on x-axis)
  • lola748
  • · Replies 3 ·
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Expression for voltage across resistor in circuit
  • leroyjenkens
  • · Replies 3 ·
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Gradient Vector Problem: Steepness and Slope Direction?
  • bmb2009
  • · Replies 4 ·
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How Do You Calculate the Force of Friction on a Moving Cart?
  • kurikat
  • · Replies 2 ·
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Speed of a Wave: Solve for V in 4.6m and 7.4s
  • pmd28
  • · Replies 3 ·
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Ice Sled Powered by Rocket Engine: Find t1, t2, v & Final Position
  • funwithphysics
  • · Replies 2 ·
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Time for Two Balls to Reach Same Height
  • n_nason
  • · Replies 5 ·
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Simple Harmonic Oscillator Problem
  • Hibbs
  • · Replies 6 ·
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Δ & Y and Superposition Theorem?
  • rbrayana123
  • · Replies 29 ·
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Zero impact vehicle that needs to travel 9 through 12 m
  • Physicsdood99
  • · Replies 5 ·
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Car sliding down inclined plane.
  • leroyjenkens
  • · Replies 14 ·
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What is the Relationship Between Spring Stretching Distance and Applied Work?
  • firezap
  • · Replies 5 ·
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Distance from +4μC to Zero Potential: 24mm
  • mrcotton
  • · Replies 2 ·
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Wave Interference - the principle of superposition
  • Element1674
  • · Replies 2 ·
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When is electric field zero and electric potential non zero
  • mrcotton
  • · Replies 1 ·
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Arrival time from two US transducers
  • enc08
  • · Replies 4 ·
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Solving Capacitive Circuit: Why is 8.35V Wrong?
  • freshbox
  • · Replies 8 ·
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Two boxes sliding down inclined plane
  • zeralda21
  • · Replies 16 ·
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Calculating Velocity and Direction Using the Doppler Effect
  • vishnu manoj
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Car moving with two blocks attached to it.
  • ShizukaSm
  • · Replies 5 ·
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Relative Acceleration in Noninertial Reference Frames
  • Bipolarity
  • · Replies 2 ·
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Rolling Coin, Kleppner and Kolenkow, off by a factor of 3
  • AlwaysCurious
  • · Replies 8 ·
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Using mathmatica, solving single equation
  • kougou
  • · Replies 2 ·
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Working out signs of work and heat for entropy change question
  • shakeybear
  • · Replies 10 ·
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Tangential acceleration of a bicycle pedal
  • daffy
  • · Replies 1 ·
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Electrons in a magnetic/electric field
  • gokuls
  • · Replies 1 ·
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What is the Acceleration of an Inclined Plane due to Recoiling Block?
  • WannabeNewton
  • · Replies 2 ·
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How to calculate initial velocity and launch angle? (Projectiles)
  • puppy143158
  • · Replies 1 ·
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How Does a Sphere Exchange Thermal Radiation in Different Temperatures?
  • bmb2009
  • · Replies 2 ·
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Solving PV Graphs: Work, Heat, ΔU Questions
  • skoopfadj
  • · Replies 3 ·
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A man pulls himself up;What force does he exert on the elevator?
  • ShizukaSm
  • · Replies 7 ·
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Magnetic Field above a Rectangular Circuit
  • Contingency
  • · Replies 3 ·
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Does Slope Affect Car Stopping Distance?
  • Kieranlavelle
  • · Replies 7 ·
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Permutation question with a dial
  • zaddyzad
  • · Replies 1 ·
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How to Determine the Brightness of Bulbs in a New Configuration?
  • hms.tech
  • · Replies 1 ·
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How to Calculate the Torque Needed to Stop a Gear System in 2 Seconds?
  • TheAustrian
  • · Replies 11 ·
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Calculating Time Dilation of a Rocket.
  • alex1261
  • · Replies 3 ·
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Physics Theory Questions. Electrostatic/magnetic
  • skg94
  • · Replies 6 ·
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Calculating Gforce of Impact from 3ft Fall
  • Cryptic edge
  • · Replies 2 ·
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How Do You Apply Series and Parallel Rules in Circuit Analysis?
  • Nikola_Tesla
  • · Replies 12 ·
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Calculating refraction in continuous refractive index
  • vmedica
  • · Replies 2 ·
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Special Relativity of rocket relative to you
  • tombarrtt
  • · Replies 3 ·
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Acceleration of block 1 in a pulley system
  • ShizukaSm
  • · Replies 4 ·
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Conceptual difficulty with Electromagnetic induction
  • ak71
  • · Replies 2 ·
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Reaction Force On Ladder and Wall Case
  • e.pramudita
  • · Replies 1 ·
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Calculating Gravity for Jumping in a Platform Game
  • menzow
  • · Replies 16 ·
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A quick distance/time question.
  • skg94
  • · Replies 2 ·
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What is the mass measured on another planet ?
  • hms.tech
  • · Replies 1 ·
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Calculating Electric Field and Force in Parallel Plate Setup
  • skg94
  • · Replies 30 ·
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