Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Doppler equation not making sense to me
- PsychonautQQ
- · Replies 4 ·
Solving for masses in an elastic collision
- mruss
- · Replies 4 ·
Finding the electric field at a given point
- kirax105strike
- · Replies 1 ·
Velocity Calculation - ball bouncing off a wall at an angle
- Molly1235
- · Replies 5 ·
What Is the Altitude of a Plane Traveling at Mach 2.5?
- jvdamdshdt
- · Replies 6 ·
How does oil affect the buoyant force of a block of wood versus water?
- agw
- · Replies 1 ·
Finding the magnitude of the electrostatic force from a thin rod
- nuagerose
- · Replies 3 ·
Calculating Average Speed of Tennis Ball
- Alucard2487
- · Replies 2 ·
Solve Average Velocity for Person Running Around Triangle
- jakb93
- · Replies 12 ·
What is the Minimum Size L for Uniform Density with Less Than 1% Error?
- xdrgnh
- · Replies 3 ·
Equation for object size relative to reflection?
- Violagirl
- · Replies 2 ·
Determine the total charge on the surface?
- nuagerose
- · Replies 4 ·
Water being hosed into the air.
- rkum99
- · Replies 2 ·
How to find the average accleration on a velocity time graph
- wittlebittle
- · Replies 1 ·
Electric Field and Work on a Moving Charge
- anthonych414
- · Replies 1 ·
Tension and Force in pulley system
- Plasmosis1
- · Replies 7 ·
Determine the total charge needed to apply to the electroscope.
- NasuSama
- · Replies 23 ·
Approximate the strong force between two protons.
- tjhero123
- · Replies 1 ·
Electromagnetic Waves Questions
- whitehorsey
- · Replies 4 ·
Understanding Virtual Images in Lenses and Mirrors
- whitehorsey
- · Replies 2 ·
Reversible heat pump - Work input?
- Splint
- · Replies 6 ·
What is the value of θ when the error in sinθ ≈ θ is approximately 5%?
- Gee Wiz
- · Replies 5 ·
Adding a capacitor in series question
- awstinf
- · Replies 20 ·
Can the acceleration of the proton be negative for this situation?
- NasuSama
- · Replies 4 ·
How Do You Calculate Uncertainty in the Volume of a Cookie?
- lep11
- · Replies 9 ·
Temperature and pressure in a laboratory
- RafaelF13
- · Replies 7 ·
Three Phase PV Grid-Tied System(MPPT)
- JermziePV
- · Replies 2 ·
How to Determine the Units of a Homogeneous Equation in Physics
- MemoNick
- · Replies 13 ·
How Do You Calculate the Electric Field of a Ring?
- tuggler
- · Replies 7 ·
What Determines the Escape Speed from Earth's Gravitational Pull?
- hadronthunder
- · Replies 3 ·
Why Does Integration Differ Between Electric Fields of a Disk and a Line Charge?
- tuggler
- · Replies 1 ·
Solving Kirchhoff's Laws: I1, I2, I3
- IronHide
- · Replies 26 ·
How Do You Calculate Object-to-Image Distance in Lens Systems?
- Aelo
- · Replies 7 ·
But, as a webpage title: Wave Problem: Solving for Phase Shift
- freezer
- · Replies 2 ·
How to calc the force needed to change direction of a moving object?
- Dastan
- · Replies 5 ·
What Is the Proper Length of Spaceship 2 in Its Rest Frame?
- Gemini_Cricket
- · Replies 15 ·
Percent uncertainty in Volume of a beach ball?
- eddiedowen
- · Replies 5 ·
Solving Ball Bearing Problem: Tower Height & Impact Velocity
- Sylis
- · Replies 4 ·
Why is the Induced Current Clockwise in this GRE Problem?
- PsychonautQQ
- · Replies 9 ·
HEY YOU Double Doppler/Radar Guns/Equation Derivation
- Jamie1995
- · Replies 2 ·
Finding Applied Force from Coefficient of Friciton and mass
- jmcpherson82
- · Replies 4 ·
Projectile motion, find speed/time of football kick
- QuantumCurt
- · Replies 7 ·
Troubleshooting a Velocity vs. Time Graph: Position at t=10
- Psyguy22
- · Replies 4 ·
Special Relativity GRE question (Where is my method flawed?)
- PsychonautQQ
- · Replies 4 ·
John Taylor Classical Mechanics Chapter 1 Problem 46
- karmonkey98k
- · Replies 1 ·
John Taylor Classical Mechanics Chapter 1 Problem 22
- karmonkey98k
- · Replies 3 ·
How Do You Calculate Projectile Motion for a Cannonball?
- mattwild
- · Replies 3 ·
Thermodynamics- rms translational kinetic energy
- yaykey428
- · Replies 3 ·
Boat heading and relative velocity
- drjohn15
- · Replies 3 ·
Three hanging balls of uniformly distributed charge
- derravaragh
- · Replies 1 ·
Where Is the Electric Field Zero Between Two Negative Charges?
- tuggler
- · Replies 3 ·
Tricky problem - Find E-field of a sheet of charge
- mindarson
- · Replies 30 ·
Small clarification: applying Coulomb's Law
- UselessLadder
- · Replies 2 ·
Intro physics proportion question
- dylanhouse
- · Replies 5 ·
Predicting Final Velocities for a Head-On Elastic Collision Problem
- ~Fluffy
- · Replies 2 ·
Density of holes on a sprinkler for uniform water distribution
- forestmine
- · Replies 1 ·
Kinematics question - Rocket launch
- rhoadsy74
- · Replies 1 ·
Capacitance, Charge and Voltage (P.D.)
- MemoNick
- · Replies 4 ·
Kinematics question - An automobile accelerating and braking
- rhoadsy74
- · Replies 1 ·
Calculating Flux Linkage in a Rotating Rectangular Coil
- MemoNick
- · Replies 4 ·
Physics free-body diagram problem?
- kal854
- · Replies 2 ·
Which of the Following is false?
- spockjones20
- · Replies 3 ·
Find Current I3 in Circuit - Homework Statement
- Gauss M.D.
- · Replies 3 ·
How Do You Solve the Motion of Two Colliding Pendulums?
- mattwild
- · Replies 1 ·
Puck on a sphere, energy & Newton's 2nd
- Habeebe
- · Replies 1 ·
Moment inertia - theoretical problem
- silenzer
- · Replies 5 ·
Equivalent Circuits: How Do (a) & (b) Compare?
- Miike012
- · Replies 2 ·
Voltage Divider: Solving for V in Series Circuits
- Miike012
- · Replies 2 ·
Equivalent resistance of a cube of resistors
- pc2-brazil
- · Replies 19 ·
E&M Problem - 2 Charged Masses Hanging on Strings
- inferno298
- · Replies 4 ·
What is the 1/e Lifetime of a Graph?
- Richard Ros
- · Replies 1 ·
Circumference of Earth With Eratosthenes
- tchouhan
- · Replies 4 ·
Time to Mars (orbit around Sun given perihelion and aphelion)
- oddjobmj
- · Replies 2 ·
How Do You Calculate the Time Period in a Spring-Block SHM System?
- Saitama
- · Replies 23 ·
Magnitude of Force of two point charges on a third (electrostatics)
- ctallarico20
- · Replies 12 ·
Having problems understanding units
- FTCC.student
- · Replies 6 ·
Mechanics - inclined plane with friction and finding max M
- skwissgaar
- · Replies 1 ·
Oppositely Charged Parallel Plates
- mattwild
- · Replies 6 ·
Calculating Reaction Force on a Stationary Wall in a Rotating System
- Dlong
- · Replies 1 ·
How Many Strides on a Moving Sidewalk?
- shealya
- · Replies 2 ·
Thermodynamics First Law Problem
- cytochrome
- · Replies 1 ·
Fluids question: U Shaped Tube.
- Eilrymist
- · Replies 2 ·
Calculating Orbital Radius for Geosynchronous Satellite Using Kepler's Third Law
- tchouhan
- · Replies 6 ·
What Are the Average Forces and Friction in These Motion Problems?
- The Precious
- · Replies 1 ·
Maximum potential given a charge
- c1223
- · Replies 2 ·
Separable PDE for electric field in a cavity
- gboff21
- · Replies 4 ·
Solve for position given force in a mass-spring system?
- kal854
- · Replies 2 ·
How High Was the Tree from Which the Squirrel Fell?
- Gazaueli
- · Replies 1 ·
Friction Acceleration: Solving for Coefficient and Force Angle
- rogerbrian05
- · Replies 1 ·
Finding centripetal acceleration and velocity
- FreshyT
- · Replies 1 ·
Leap Off an Asteroid: Escape Earthly Gravity?
- tjsingle
- · Replies 2 ·
Momentum Investigation: Car collision
- Silurias
- · Replies 2 ·
Circular Motion Problem 2: Help with Solving | Physics Forum
- thunderhadron
- · Replies 10 ·
Solving Circular Motion Problems | Book Answer Included
- thunderhadron
- · Replies 2 ·
Can Work, Power, and Energy be Solved Together?
- thunderhadron
- · Replies 5 ·
Solving a Force Problem: Tips and Tricks for Finding the Correct Answer
- thunderhadron
- · Replies 4 ·
Solving a Rotation Mechanics Problem: Option D vs Attempted Solution
- thunderhadron
- · Replies 8 ·
What is the Solution to a Confusing Circular Motion Problem?
- thunderhadron
- · Replies 5 ·
Find Maximum Separation of Points A & B with 4000N Tension in Ropes
- atagl1
- · Replies 4 ·
Calculating Force on Quarter Cylinder Dam Gate with Hinge and Stopper
- cambo86
- · Replies 5 ·