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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.

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Basic special relativity calculation

marmoset
Oct 29, 2008 · Replies 6 · Nov 2, 2008

Replies: 6

Solving Momentum & Energy Homework: 2 People on Frictionless Ice Sleigh

kky1638
Nov 1, 2008 · Replies 3 · Nov 2, 2008

Replies: 3

Kinetic friction Homework Problem

carljohnston2
Nov 1, 2008 · Replies 5 · Nov 2, 2008

Replies: 5

How Is Torque Calculated on a Hinged Door Due to Its Weight?

trainumc
Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Angular momentum of a rigid body

DH214
Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Elastic collision of neon atom problem

mithanon
Oct 31, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Find Largest Safe Mass for 3D Force Equilibrium

Melawrghk
Oct 31, 2008 · Replies 11 · Nov 1, 2008

Replies: 11

Calculating Work Done by Block on Pulley

DH214
Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

How Does a Gust of Wind Affect a Sailboat's Speed and Direction?

Jennifer001
Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Equations for rotational motion with constant acceleration

DH214
Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Perfectly inelastic collision problem

maxdaddy
Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

What Is the Maximum Acceleration for a Truck Carrying a Crate?

kaylanp01
Nov 1, 2008 · Replies 8 · Nov 1, 2008

Replies: 8

Mass of Star HD 179949: 8.77x10^31 kg

kuahji
Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Finding the Height of a Block Released from a Frictionless Track

Elbobo
Nov 1, 2008 · Replies 5 · Nov 1, 2008

Replies: 5

Motion of Charged Particles in Electric Fields

soccerdude28
Nov 1, 2008 · Replies 3 · Nov 1, 2008

Replies: 3

Cons. of momentum and cons. of energy

musicfairy
Oct 28, 2008 · Replies 4 · Nov 1, 2008

Replies: 4

Calculating Velocity and Time of a Horizontal Projectile

davo
Nov 1, 2008 · Replies 6 · Nov 1, 2008

Replies: 6

Thermodynamically irreversible processes

loom91
May 31, 2007 · Replies 5 · Nov 1, 2008

Replies: 5

Question regarding distance traveled up an incline?

choyphin
Nov 1, 2008 · Replies 3 · Nov 1, 2008

Replies: 3

How Do You Solve an Off-Center Elastic Collision Problem?

jromeo
Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Trying to prove that Impulse = change in momentum

GRB 080319B
Oct 29, 2008 · Replies 5 · Nov 1, 2008

Replies: 5

How Does Resistance Vary with Wire Cross-Sectional Area Changes?

Sheneron
Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

What Is the Maximum EMF Induced in a Vibrating Guitar String?

Ithryndil
Oct 31, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

How High Can an Object Reach if Projected Upward at 3.7 km/s?

maniacp08
Oct 31, 2008 · Replies 8 · Nov 1, 2008

Replies: 8

How to Calculate Spring Compression for a Direct Hit in a Projectile Game?

azure kitsune
Oct 29, 2008 · Replies 3 · Nov 1, 2008

Replies: 3

How to Sketch Electric Fields Around a Charge Distribution?

soccerdude28
Nov 1, 2008 · Replies 2 · Nov 1, 2008

Replies: 2

Applying Newton's Third Law to Tetherball

jessica.so
Nov 1, 2008 · Replies 2 · Nov 1, 2008

Replies: 2

What Is the Minimum Mass Difference for Atwood's Machine with Friction?

xRadio
Nov 1, 2008 · Replies 2 · Nov 1, 2008

Replies: 2

Pulley System: Solving for Acceleration (a3)

asi123
Nov 1, 2008 · Replies 2 · Nov 1, 2008

Replies: 2

Solve Bobsled Problem: Find How Far Does It Travel Up a 30 Degree Incline

choyphin
Nov 1, 2008 · Replies 5 · Nov 1, 2008

Replies: 5

Energy carried by Electromagnetic Waves

Gannon
Oct 31, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Understanding Acceleration Direction in a Pendulum Swing

ScullyX51
Oct 31, 2008 · Replies 4 · Nov 1, 2008

Replies: 4

How Does Evaporative Cooling Keep Beverages Cold?

laksate
Oct 31, 2008 · Replies 4 · Nov 1, 2008

Replies: 4

Friction and Banked road question

msq126
Oct 31, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Solving the Sliding Block Problem: Fig. 4-48

Toxage
Oct 31, 2008 · Replies 19 · Oct 31, 2008

Replies: 19

What Forces Act on Three Blocks on a Frictionless Surface?

ScullyX51
Oct 31, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

Coefficient of friction for a shoe sole

chrispat
Oct 31, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

Solving a Three-Force Member Equilibrium of Particles Question

Melawrghk
Oct 30, 2008 · Replies 3 · Oct 31, 2008

Replies: 3

How Does Friction Affect the Speed of a Box on Different Surfaces?

Awwnutz
Oct 6, 2008 · Replies 4 · Oct 31, 2008

Replies: 4

Avoiding Elevator Problems: Solving for Force and Acceleration in an Elevator

Toxage
Oct 31, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Solution: Normal Force for Plane Taking Off at 45 Degrees

Quincy
Oct 31, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Black Body Radiation: Find Temperature of Panel PM in Radiation Equilibrium

SEEDS
Oct 31, 2008 · Replies 6 · Oct 31, 2008

Replies: 6

Hat is the coefficient of kinetic friction between the floor and the box

Nayeli MTZ
Oct 31, 2008 · Replies 4 · Oct 31, 2008

Replies: 4

Why Is v1 Assumed to Be Zero in Bernoulli's Equation for a Large Tank?

TheCurator
Oct 31, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Conservation of momentum astronauts question

cali_sk8er205
Oct 30, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Find acceleration of this system with friction

lax1113
Oct 31, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Angular Momentum (Modern Physics)

roeb
Oct 31, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

Rotational Dynamics of a solid uniform disk

rwx1606
Oct 29, 2008 · Replies 5 · Oct 31, 2008

Replies: 5

Simple Pulley System: Accelerations Equation Explained

asi123
Oct 31, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

Acceleration of M1 in System of Pulleys

thejinx0r
Oct 13, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Solving Candle Burn Time Problem with Algebra

Vuldoraq
Oct 31, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Conservation of Momentum vs. Energy in sticking collisions

Tibriel
Oct 31, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

What is the density of an iceberg and how much of it will show in fresh water?

Vuldoraq
Oct 31, 2008 · Replies 3 · Oct 31, 2008

Replies: 3

Velocity of a particle in a parallel plate, electric field problem

chem1
Oct 30, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

Making up a question for Hooke's Law based on Calcullus

bankedroads
Oct 31, 2008 · Replies 4 · Oct 31, 2008

Replies: 4

How Does a Particle Reach Infinity in Finite Time with Angular Force?

Ertosthnes
Oct 30, 2008 · Replies 3 · Oct 31, 2008

Replies: 3

Derive Angular Momentum in Elliptical Orbit

psychicist
Oct 31, 2008 · Replies 3 · Oct 31, 2008

Replies: 3

Why Is the Correct Answer for This Lap Time Problem B Instead of A?

nokia8650
Oct 31, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Projectile Fired Against Sloped Surface

CzarValvador
Oct 23, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Finding the Axle Force on a Pulley System

needphyshelp
Oct 31, 2008 · Replies 3 · Oct 31, 2008

Replies: 3

Energy Equations Need help with energy of system & coefficient of friction

EgererI
Oct 30, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

Is this correct use of the formula? (Pressure, Volume and Temperature)

D4BST3R
Oct 31, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Gas volume at 20°C to 130°C - Need formula

D4BST3R
Oct 31, 2008 · Replies 4 · Oct 31, 2008

Replies: 4

Graphing Resistance vs. Bandwidth, why wouldn't go throught the origin?

crh
Oct 30, 2008 · Replies 3 · Oct 31, 2008

Replies: 3

Friction, circular motion (stupid question)

robs
Oct 31, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

Block on slop compressing spring.

tmh88
Oct 31, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

V(rms): Definition & Difference Explained

Sparkyian
Oct 31, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Torques: Rotational Equilibrium Mobile

hi:)
Oct 30, 2008 · Replies 4 · Oct 31, 2008

Replies: 4

Understanding the V(in)=V(max).sin(wt) Formula for DC Smoothing Circuits

Sparkyian
Oct 27, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

Re-arranging a formula to find Vm

Sparkyian
Oct 27, 2008 · Replies 2 · Oct 31, 2008

Replies: 2

What Is the Speed and Acceleration of a Soccer Ball After a Collision?

hazex36
Oct 31, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

Why Doesn't the Coil Radius Affect the Induced EMF Calculation?

Ithryndil
Oct 30, 2008 · Replies 5 · Oct 30, 2008

Replies: 5

Finding Components of Cross Product for Vectors A and B

angel120
Oct 30, 2008 · Replies 5 · Oct 30, 2008

Replies: 5

Wavelength of Light: 0.544µm in Air & Water

Kickbladesama
Oct 28, 2008 · Replies 4 · Oct 30, 2008

Replies: 4

Relativistic Addition of Proton Velocities

catch-22
Oct 29, 2008 · Replies 2 · Oct 30, 2008

Replies: 2

How Do You Calculate the Net Force on a Satellite in Circular Orbit?

iluvphys
Oct 29, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

Gravity Problem - Satellite Orbit Calculations

maniacp08
Oct 30, 2008 · Replies 7 · Oct 30, 2008

Replies: 7

Inertial Reference Frames and Newtons laws

Blangett
Oct 30, 2008 · Replies 3 · Oct 30, 2008

Replies: 3

What is the velocity of the car

jammhawk
Oct 30, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

Solving 2kg Fan-Cart Motion: Acceleration, Velocity & Displacement

jammhawk
Oct 30, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

How Does Charge in a Capacitor Satisfy the Given Differential Equation?

TFM
Oct 25, 2008 · Replies 67 · Oct 30, 2008

3

Replies: 67

Golf ball problem (2D Kinematics)

chudd88
Oct 30, 2008 · Replies 3 · Oct 30, 2008

Replies: 3

Ratio of Space Average Velocity to Time Average Velocity?

ritwik06
Oct 29, 2008 · Replies 14 · Oct 30, 2008

Replies: 14

How do I graphically add vectors with assigned values and angles?

glindawantsme
Oct 30, 2008 · Replies 4 · Oct 30, 2008

Replies: 4

Solving for Angle, Momentum & Energy of Particle Collision

Awwnutz
Oct 29, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

What Is the Maximum Amplitude for SHM Without Slipping?

kmboling
Oct 30, 2008 · Replies 2 · Oct 30, 2008

Replies: 2

Solving for Coefficient of Friction with 30N Force

glindawantsme
Oct 30, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

How do I find the maximum compression of a spring?

lustish
Oct 30, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

Solve Two-Pulley Problem: Tensions, Forces & Diagrams

scipioaffric
Oct 30, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

3 stars in an equilateral triangle

burianek
Oct 30, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

Find displacement of marble launched from a spring (Energy), help please

mickeymouseho
Oct 30, 2008 · Replies 2 · Oct 30, 2008

Replies: 2

Force and distance/velocity/acceleration

jammhawk
Oct 30, 2008 · Replies 16 · Oct 30, 2008

Replies: 16

Air Hockey Momentum: Puck A & B Collision

Chrisleo13
Oct 26, 2008 · Replies 11 · Oct 30, 2008

Replies: 11

Faraday's Law and electron force

Ithryndil
Oct 29, 2008 · Replies 5 · Oct 30, 2008

Replies: 5

Physics Questions: Frictionless Surfaces, Astronauts, Tennis Balls

cali_sk8er205
Oct 30, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

Electrostatics - force on point charges by electric field

risk2112
Oct 29, 2008 · Replies 1 · Oct 30, 2008

Replies: 1

Distance between each double-slit and the light band.

RProgrammer
Oct 30, 2008 · Replies 4 · Oct 30, 2008

Replies: 4

Faraday's Law, EMF, Finding Current in Loop

ncm2
Oct 29, 2008 · Replies 8 · Oct 30, 2008

Replies: 8

Conservation of energy problem(s)

Quincy
Oct 29, 2008 · Replies 5 · Oct 30, 2008

Replies: 5

Dynamics: Newtons laws of motion

Infamous_01
Oct 30, 2008 · Replies 3 · Oct 30, 2008

Replies: 3

Intro Physics Homework Help

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