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.
Calculating Wind Speed for Suspended Cylinder
  • Saitama
  • · Replies 27 ·
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27
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4K
Wheels Reaction Forces: Solving for Ra and Rb?
  • BlueCB
  • · Replies 17 ·
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17
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6K
What Is the Final Velocity of the Black Ball After Collision?
  • Dreaam
  • · Replies 8 ·
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8
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2K
How do I Find the Enclosed Charge of a Closed Surface?
  • chipotleaway
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1
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2K
What Are the Answers to These Magnetism Questions?
  • Sunturday
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5
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How can an uncharged capacitor work as a short circuit?
  • Instinctlol
  • · Replies 10 ·
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10
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27K
Valence Electrons of ClO2+: A Comprehensive Guide
  • ikihi
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1
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Under what conditions is a current generated w/ a magnet and solenoid?
  • miaou5
  • · Replies 6 ·
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6
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2K
What Is Acceleration and How Does It Relate to Velocity and Time?
  • oldspice1212
  • · Replies 6 ·
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6
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Quantum Mechanics Help. Compton Scattering Use.
  • Billy12
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2
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How Do You Calculate the Average Kinetic Energy of Multiple Helium Atoms?
  • Knightycloud
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2
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How to Graph Potential Energy from Force Fx Along the x-axis?
  • bestchemist
  • · Replies 50 ·
2
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50
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13K
Statics: Forces in a truss, method of joints
  • yaro99
  • · Replies 3 ·
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3
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8K
Electric Field of a Polarized Sphere with Nonuniform Polarization
  • Astrum
  • · Replies 4 ·
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4
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3K
How Can I Improve My Understanding of Mechanics in Physics?
  • hbk69
  • · Replies 17 ·
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17
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3K
What is the Correct Value of Dx in Frame Analysis?
  • yaro99
  • · Replies 4 ·
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4
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4K
Calculating Capacitance of a Parallel Plate Capacitor Using Integration
  • sankalpmittal
  • · Replies 8 ·
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8
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Error analysis/mechanics help appreciated
  • lauraanderson
  • · Replies 1 ·
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1
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Principle of conservation of linear momentum equation
  • SirPlus
  • · Replies 3 ·
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3
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2K
What is the final angular velocity when two rotating disks are pushed together?
  • duplaimp
  • · Replies 5 ·
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5
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7K
Box on ground, incline (with friction), ground: find Kinetic Energy
  • questtosuccess
  • · Replies 10 ·
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10
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7K
How does the moment of inertia scale?
  • student34
  • · Replies 2 ·
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2
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14K
Can the fullness of a cylinder of water be determined by its frequency
  • tsuwal
  • · Replies 7 ·
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7
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2K
Momentum of an object exploding into two separate objects
  • bharat91
  • · Replies 6 ·
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6
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7K
Solve Rotational Problem 3: Max Angle for Rod+Clay
  • Anthonyphy2013
  • · Replies 2 ·
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2
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3K
Elastic collision between two billiard balls
  • phyme814
  • · Replies 4 ·
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4
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4K
Problem of Oscillation of mass attached to spring with external force
  • Saurabh Sikchi
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1
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2K
Coefficient of drag of a ping pong ball
  • Dayton
  • · Replies 3 ·
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3
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9K
Minimum distance around a track
  • better361
  • · Replies 1 ·
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1
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2K
Problem on the magnetic force on a wire
  • electrohau5
  • · Replies 3 ·
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3
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5K
Another relative speed and size question
  • patricktaylor
  • · Replies 7 ·
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7
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5K
Calculating total work using kinetic-work theorem
  • tjw137
  • · Replies 4 ·
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4
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5K
Diffraction Grating Homework: Zeroth & 1st Order Bright Spots
  • aChordate
  • · Replies 10 ·
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10
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3K
Torque on shaft of pulley question
  • pjb73
  • · Replies 11 ·
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11
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5K
Battery and capacitor in series
  • Qroid
  • · Replies 9 ·
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9
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2K
How many times must an 80 kg weight be lifted to burn off .5 kg of fat?
  • ShizukaSm
  • · Replies 4 ·
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4
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3K
Why Does the IPhO 2012 Problem Assume ΔU=0 in a Collapsing Star Model?
  • jaumzaum
  • · Replies 19 ·
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19
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4K
Coulombs force law in a three dimensional coordinate system problem
  • SirPlus
  • · Replies 8 ·
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8
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8K
Accounting for Water Vapor Condensation in Charles' Law Experiment Measurements
  • sunflowerzz
  • · Replies 4 ·
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4
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3K
Calculating Moment of Inertia for Square Particle System
  • duplaimp
  • · Replies 2 ·
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2
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5K
Moment of inertia of a bar with two spheres
  • duplaimp
  • · Replies 6 ·
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6
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7K
Jumping on a sliding board with no friction between surfaces.
  • judas_priest
  • · Replies 3 ·
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3
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3K
What is the Centroid of a Wire and How to Calculate It Using Geometry?
  • yaro99
  • · Replies 5 ·
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5
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4K
Calculate Tsunami Energy: Height, Width, Length & Depth
  • Dastan
  • · Replies 2 ·
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2
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2K
Ladder problem (statics) with 2 sources of friction
  • natasha13100
  • · Replies 2 ·
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2
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Solving Elevator Problem Homework Statement
  • Anthonyphy2013
  • · Replies 7 ·
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7
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3K
How is the slope of the temperature graph determined?
  • ShizukaSm
  • · Replies 3 ·
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3
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4K
Force on 500g Particle: Velocity at t = 2s
  • bestchemist
  • · Replies 4 ·
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4
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What is the Solution for IPhO 2013 Theoretical Problem 1?
  • theultimate6
  • · Replies 11 ·
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11
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Kinetic/Potential Energy Problem
  • mathpat
  • · Replies 11 ·
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11
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2K
How Does Heron's Ancient Steam Engine Calculate Rotational Speed?
  • Arcarius
  • · Replies 2 ·
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2
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2K
Torque / Pulley / Weight question
  • pjb73
  • · Replies 10 ·
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10
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Square loop, find the charge in the resistor
  • thercias
  • · Replies 7 ·
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7
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When will the induced current in the loop be maximal during acceleration?
  • assaftolko
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1
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Young’s double slit experiment
  • aChordate
  • · Replies 5 ·
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5
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3K
How Does Slipping Affect the Acceleration of a Rolling Ball?
  • CaptainP
  • · Replies 1 ·
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1
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How Are Solutions -91.9 and 170 Derived Using the Quadratic Formula?
  • Kimosabae
  • · Replies 3 ·
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3
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Calculating Angular Displacement of CD with Radius 6.0 cm
  • Anthonyphy2013
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1
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Motion problem Final velocity of a dropped stone
  • debjit625
  • · Replies 4 ·
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4
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Total Magnification of Two Converging Lenses
  • aChordate
  • · Replies 9 ·
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9
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Thin-Film Interference and Antireflective coating
  • aChordate
  • · Replies 7 ·
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7
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4K
What Is the Particle's Speed When Its X Coordinate Reaches 15m?
  • Anthonyphy2013
  • · Replies 2 ·
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2
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2K
Calculating Terminal Velocity for a Falling Object with Air Resistance
  • Arcarius
  • · Replies 4 ·
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4
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8K
Two spheres travelling in opposite directions collide
  • Woolyabyss
  • · Replies 3 ·
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3
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Tension on a string and charge -
  • thercias
  • · Replies 4 ·
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4
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4K
Calculating the Length of the Tortoise-Hare Race
  • Anthonyphy2013
  • · Replies 2 ·
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2
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Modified Twin Paradox in Special Relativity
  • zytsang
  • · Replies 6 ·
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6
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3K
How Far Does the Block Travel Below Equilibrium After a Sharp Blow?
  • RandomGuy1
  • · Replies 3 ·
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3
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2K
Calculate the velocity on which the pump will fill
  • mzhades
  • · Replies 1 ·
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1
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1K
Balancing Forces on a Wooden Board: Determining the Point of Equilibrium
  • SPiazzo
  • · Replies 2 ·
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2
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2K
Converging Lens Homework: Finding Image Distance with Thin Lens Equation"
  • aChordate
  • · Replies 3 ·
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3
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2K
Will someone check my work to see if Im on the right track?
  • camel-man
  • · Replies 1 ·
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1
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2K
Conservation Laws and Symmetries Particle Physics
  • highwayman1739
  • · Replies 3 ·
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3
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3K
When Should Driver B Start to Catch Driver A?
  • duplaimp
  • · Replies 9 ·
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9
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Resultant Force #2 - Calculating ##\vec{F}_R##
  • STEMucator
  • · Replies 2 ·
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2
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2K
What Is the Correct Radial Acceleration for a Spinning Wheel?
  • student34
  • · Replies 2 ·
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2
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2K
How Do You Calculate the Resultant Force Between Two Vectors?
  • STEMucator
  • · Replies 20 ·
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20
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6K
What is the energy difference of a hydrogen atom in a magnetic field?
  • knowLittle
  • · Replies 18 ·
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18
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Help with special relativity problem (off by a factor of 2)
  • weston.pace
  • · Replies 4 ·
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4
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2K
Airplane direction and wind direction
  • JSan
  • · Replies 2 ·
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2
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2K
How Do You Calculate the Value of C1 in a Mixed Capacitor Circuit?
  • mbaban
  • · Replies 6 ·
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6
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3K
Finding the Critical Angle for T.I.R.
  • aChordate
  • · Replies 1 ·
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1
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Find Net Resistance b/w A & B in Attach 1: Explaining Equipotential Points
  • andyrk
  • · Replies 7 ·
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7
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2K
Magnetic force on a curved conductor
  • carnot cycle
  • · Replies 1 ·
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1
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2K
Mass Spring System: Find Natural Frequencies & Mode Shapes
  • acpower89
  • · Replies 2 ·
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2
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What Are the Speeds of the Fragments from a Space Rocket Explosion?
  • judas_priest
  • · Replies 2 ·
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2
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Change in momentum of different masses
  • judas_priest
  • · Replies 2 ·
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2
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2K
Equation to find relative sound intensity with angle from source
  • firewire7
  • · Replies 1 ·
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1
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2K
Circular Motion Homework: Plane at 200m/s, R Radius to Zero Weight
  • Anthonyphy2013
  • · Replies 5 ·
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5
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3K
Cannon Projectiles: Find v_0 & theta for Roof of Flooded Building
  • postfan
  • · Replies 9 ·
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9
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2K
Physics & Geometry: Solving Quaternary Star System Homework
  • Bashyboy
  • · Replies 12 ·
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12
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4K
Calculating the final temperature of a mixture of Ice and Water
  • Jham808
  • · Replies 6 ·
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6
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6K
Max Angle of Rod w/ Clay Ball: Rotational Problem 2
  • Anthonyphy2013
  • · Replies 3 ·
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3
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2K
Problem with spring + inclined plane + conversation of energy etc
  • -sandro-
  • · Replies 27 ·
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27
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4K
A mass attached to a pulley- torque
  • natasha13100
  • · Replies 7 ·
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7
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5K
Equivalent resistance in a parallel circuit
  • Kurokari
  • · Replies 6 ·
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6
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2K
Finding the Distance for a Projectile to Land on a Moving Cart
  • judas_priest
  • · Replies 4 ·
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4
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2K
DISTANCE travelled by the projectile
  • judas_priest
  • · Replies 4 ·
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4
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3K
Relationships between Current, Voltage and Resistance
  • fictionistruth
  • · Replies 1 ·
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1
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2K
Introductory Special Relativity Problem
  • puneeth9b
  • · Replies 16 ·
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16
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3K