Introductory Physics Homework Help Forum

Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.

Threads

Calculating Equilibrium Constant Kc - Need Help!

  • ~angel~
  • · Replies 6 ·
Replies
6
Replies
2

Estimating Collision Duration in Rear-End Car Crashes

  • Frank_Horrigan
  • · Replies 2 ·
Replies
2

Uniform circular motion - centripetal force and banked curves

  • dippedindettol
  • · Replies 3 ·
Replies
3

How to calculate vehicle deceleration (time to stop)

  • sparknote_s
  • · Replies 2 ·
Replies
2

Meteorite heading towards earth

  • josephcollins
  • · Replies 4 ·
Replies
4
Replies
3

What are the orthogonal trajectories for x^2y=c_1 and x^2+c_{1}y^3=1?

  • RadiationX
  • · Replies 4 ·
Replies
4

Calculate Current & Resistance of 4.5V Battery & 12Ω Resistor

  • faisal
  • · Replies 5 ·
Replies
5
Replies
6

Calculating Energy Required to Move a Space Shuffle

  • bayan
  • · Replies 7 ·
Replies
7

What Happens to Light Speed After Passing Through Glass?

  • ccf788
  • · Replies 5 ·
Replies
5

Finding the Limit of tln(t) as t Approaches 0

  • mattmns
  • · Replies 4 ·
Replies
4

Finding the Density of a Wooden Cube Submerged in Water

  • psycovic23
  • · Replies 4 ·
Replies
4

Moment of Inertia for a Sphere with Lead Coating

  • MAPgirl23
  • · Replies 6 ·
Replies
6

Max and min frequencies of a capacitor

  • laminatedevildoll
  • · Replies 4 ·
Replies
4

Are Electric and Magnetic Fields Zero for a Moving Charged Particle?

  • harhar
  • · Replies 6 ·
Replies
6

Dynamics - Finding the Net Force

  • AnthonyC
  • · Replies 20 ·
Replies
20

Problems involving maximum and minimum values

  • imbecile
  • · Replies 5 ·
Replies
5

Proving Thomae's Function f(x) Not Differentiable"

  • limdaesung
  • · Replies 2 ·
Replies
2

Solving Rolling Sphere on Sloped Plane: Mass, Friction, & Acceleration

  • MAPgirl23
  • · Replies 5 ·
Replies
5

A question regarding acceleration

  • anthonyy
  • · Replies 4 ·
Replies
4

Is Frictional Force Only Dependent on Weight and Not Surface Area?

  • michaelw
  • · Replies 7 ·
Replies
7

Understanding Action and Reaction Forces: A Sketch Guide for Beachgoers

  • RavenXGb
  • · Replies 4 ·
Replies
4

What are some project ideas for an AP Physics class involving electricity?

  • katie14618
  • · Replies 3 ·
Replies
3

How Do You Calculate Total Pressure in Mixed Gas Systems?

  • ravadongon
  • · Replies 3 ·
Replies
3

Understanding Limits to Solving Two Common Questions

  • DieCommie
  • · Replies 7 ·
Replies
7

Solving for u & A: Help Appreciated!

  • DivGradCurl
  • · Replies 2 ·
Replies
2

Integration by Parts of <C> i just cannot do

  • Rachael_Victoria
  • · Replies 2 ·
Replies
2

How Do I Solve These Electromagnetism Multiple Choice Questions?

  • seiferseph
  • · Replies 13 ·
Replies
13

Solving Cosmology Problem: Helium Ionization at Recombination

  • Dracovich
  • · Replies 2 ·
Replies
2

Fatal Pressure in Car Crashes with Airbags & Seatbelts

  • Frank_Horrigan
  • · Replies 3 ·
Replies
3

Forces on roller coaster doing a loop

  • UrbanXrisis
  • · Replies 3 ·
Replies
3

Linear Algebra Basics: True/False Questions and Rank Properties

  • Tony11235
  • · Replies 5 ·
Replies
5
Replies
12

Eraser sliding down slope - Friction

  • Kamataat
  • · Replies 5 ·
Replies
5
Replies
5

Proving Roots of f(x) with Odd n ≤ 3

  • Neoma
  • · Replies 2 ·
Replies
2
  • Poll Poll

Help Me Get My Simple Electric Motor Going!

  • milkshake14
  • · Replies 2 ·
Replies
2

Evaluating the Limit of f(x,y) at (0,y')

  • Benny
  • · Replies 5 ·
Replies
5

Proving the Annihilation of x^ke^{rx} by (D-r)^m

  • mekkomhada
  • · Replies 12 ·
Replies
12

Chemistry help: egg on a mountain.

  • m0286
  • · Replies 8 ·
Replies
8

How do you draw electron dot diagrams for pentyne?

  • Anais
  • · Replies 4 ·
Replies
4

Calculate Angular Acceleration of Rotating Door

  • nutster
  • · Replies 11 ·
Replies
11

Calculate Height of Falling Stone: 2.2m Window in 0.28s

  • jena
  • · Replies 6 ·
Replies
6

Calculate the change in entropy of the system

  • squib
  • · Replies 3 ·
Replies
3

Centripetal and tangential acceleration

  • nutster
  • · Replies 3 ·
Replies
3
Replies
10

Neutron star's angular velocity

  • MAPgirl23
  • · Replies 5 ·
Replies
5

Designing an Alien for Saturn: 5 Special Features for Survival

  • blah blah
  • · Replies 11 ·
Replies
11

What is the net compression in Pascals?

  • sid_galt
  • · Replies 14 ·
Replies
14
Replies
2

Question regarding Physics Principles

  • Nikola Tesla
  • · Replies 4 ·
Replies
4

Why Does My Ideal Gas Law Calculation Differ from the Textbook?

  • sghaussi
  • · Replies 3 ·
Replies
3

Photoelectric effect and work functions

  • bullroar_86
  • · Replies 4 ·
Replies
4

Obtaining Energy from Stars: Grand Challenge

  • InfernoSun
  • · Replies 8 ·
Replies
8

How can I use Trigonometric substitution to evaluate this integral?

  • Vadim
  • · Replies 2 ·
Replies
2

Solve Water Displacement: General Chemistry Question

  • PhHsSuga05
  • · Replies 2 ·
Replies
2
Replies
9

Constructing a Unique Model Atom for a Science Project

  • Linkk06
  • · Replies 12 ·
Replies
12

Derivative of Symmetric Tensor with Respect to a Component

  • JohanL
  • · Replies 12 ·
Replies
12

How to Calculate the Force on a Charge in an Equilateral Triangle?

  • laminatedevildoll
  • · Replies 2 ·
Replies
2

Find the Answer to the Ball's Velocity Puzzle

  • kamiltartar
  • · Replies 2 ·
Replies
2

Deriving the energy of a magnetic dipole in a magnetic field

  • trickae
  • · Replies 8 ·
Replies
8

Temp Effects on Forward & Reverse Rate Constants

  • BH20
  • · Replies 2 ·
Replies
2

What Is the Value of k in This Normal Distribution Problem?

  • gillgill
  • · Replies 2 ·
Replies
2

How Wide is the Potential Well When an Electron Emits a Photon?

  • Infinity
  • · Replies 2 ·
Replies
2

Calculating Amplitude of Electromagnetic Waves 100 km from Earth

  • vabamyyr
  • · Replies 2 ·
Replies
2

Closed: How to Cope During Difficult Times

  • nofx
  • · Replies 2 ·
Replies
2

Probably a very easy length contraction problem

  • .....
  • · Replies 6 ·
Replies
6

Some specific questions about waves

  • PinkSheep
  • · Replies 2 ·
Replies
2

Mills Method of Inductive Inference

  • kennethj67
  • · Replies 4 ·
Replies
4
Replies
2

Calculate the work done accelerating a proton

  • bayan
  • · Replies 2 ·
Replies
2

The Right Hand Rule: Direction of Ring Induced Current in Solenoid

  • laminatedevildoll
  • · Replies 3 ·
Replies
3

Inertia tensors (moment of inertia) code

  • Aggrav8d
  • · Replies 3 ·
Replies
3

How Do You Calculate the Width of a Slit in Single Slit Diffraction?

  • drunkenfool
  • · Replies 2 ·
Replies
2

Proving Bijections: Q and Q x X

  • laminatedevildoll
  • · Replies 3 ·
Replies
3

Example Showing (A x B) U (X x Y) ≠ (A U X) x (B U Y)

  • laminatedevildoll
  • · Replies 3 ·
Replies
3

Dynamics - Unbalanced Force - Probably Very Easy

  • AnthonyC
  • · Replies 2 ·
Replies
2

How Do You Convert Volts to Joules for Calculating Electron Velocity?

  • icedevilwoot
  • · Replies 6 ·
Replies
6

X-y components after a collision

  • MAPgirl23
  • · Replies 3 ·
Replies
3

Elastic Potential Energy and SHM test

  • PhysicsinCalifornia
  • · Replies 10 ·
Replies
10

Solving Impulse & Momentum Problems: Troubleshooting an Error

  • verd
  • · Replies 7 ·
Replies
7

Help with Moments Question Part II

  • omairt2001
  • · Replies 7 ·
Replies
7

How Is Charge Distributed on a Conducting Shell with a Central Charge?

  • thechunk
  • · Replies 3 ·
Replies
3

What is the solution to the equation y''' + 4y'' + 4y'=0?

  • RadiationX
  • · Replies 3 ·
Replies
3
Replies
2

What are the potential energy equations for this system?

  • devious_
  • · Replies 6 ·
Replies
6

How Should Error Bars Be Placed in an Ohm's Law Lab Graph?

  • fomenkoa
  • · Replies 2 ·
Replies
2

Solving a Head-On Collision: Algebra Problem

  • verd
  • · Replies 10 ·
Replies
10

Analytic Geometry: Proving R Lies on Ellipse

  • dajugganaut
  • · Replies 4 ·
Replies
4

Finding G-Force & Pressure in Fluid Flow: Aluminium Sphere Case

  • cogs24
  • · Replies 4 ·
Replies
4

Calculus Questions: Help Solve 1.2m^3/min & 20km/h Challenges!

  • Keyboard
  • · Replies 10 ·
Replies
10

How to write matrices as tensors

  • JohanL
  • · Replies 5 ·
Replies
5

What Do You Get When You Multiply the Next Two Numbers in This Sequence?

  • bblueblob
  • · Replies 15 ·
Replies
15
Replies
7

Understanding Forced Oscillations in a Stretched Wire

  • buyuk_turkiye_ufo
  • · Replies 5 ·
Replies
5

How far does the catapult hurl the truck?

  • honxkyu
  • · Replies 8 ·
Replies
8

Relative Motion and acceleration

  • ac2707
  • · Replies 5 ·
Replies
5