Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
What Is the Minimum Thickness for Constructive Interference in a Thin Film?
- Joza
- · Replies 11 ·
How Does the Photoelectric Effect Apply to X-ray Tube Mechanisms?
- rey242
- · Replies 2 ·
Find Intensity of Light After Removing Second Polarizer | Polarizer Easy Q"
- weathercheck
- · Replies 20 ·
Torque exerted on trap door by rope
- streeter
- · Replies 1 ·
What Is the Average Power Output of an Elevator Motor During Acceleration?
- mkwok
- · Replies 3 ·
Calculate Distance from Right End When Plank Tips
- Mcdeltateta
- · Replies 1 ·
Can I Use a Capacitor to Power My Home Outlet?
- indigojoker
- · Replies 4 ·
Destructive interference and fringes
- Joza
- · Replies 7 ·
Kinetic energy with momentum equation
- ~christina~
- · Replies 4 ·
Change in linear Momentum(rebound)?
- grouchy
- · Replies 2 ·
Box being pulled up a ramp by a horizontal force
- phys101
- · Replies 11 ·
Calculating Force on a Simple Water Squirter Plunger: A1, V1, A2, V2
- Genza
- · Replies 2 ·
Conservation of energy of a sliding block
- anap40
- · Replies 5 ·
Understanding Conventional Current and Electron Flow
- Oerg
- · Replies 2 ·
Gravitation/Average Force Problem
- brendan3eb
- · Replies 1 ·
How Does Blood Temperature Change During Exercise?
- phobia
- · Replies 2 ·
Box on a ramp: What is the reaction force on the box due to the ramp?
- phys101
- · Replies 2 ·
What Are the Best Physics Logic Puzzles on Forces and Energy?
- Nachore
- · Replies 3 ·
Near Point Without Spectacles: 1m
- SwaggerJohn
- · Replies 1 ·
Final Velocity (involving momentum)
- grouchy
- · Replies 1 ·
Sound wave intensity of elephants
- sun
- · Replies 1 ·
Length vs. Period: Comparing Linear & Quadratic Relationships
- petern
- · Replies 14 ·
Displacement of a car before it stops
- missashley
- · Replies 1 ·
How Much Force Stops a Pole Vaulter?
- sensesfail
- · Replies 1 ·
Painting a Dome with rollerskates
- ~christina~
- · Replies 32 ·
Time When Pendulum Clock is Put on Moon?
- petern
- · Replies 7 ·
What Is the Spring Constant and Velocity of a Box on an Inclined Plane?
- tachu101
- · Replies 8 ·
Work done and rotation of record player
- mattyisphtty
- · Replies 3 ·
What Is the Angular Acceleration of a Steam Engine Flywheel?
- sana masih
- · Replies 1 ·
Rotational KE: Calculate Energy of 2 Astronauts | 739.3 J
- Noor123
- · Replies 1 ·
Tension Force Direction in Inclined Block Problems
- chantalprince
- · Replies 2 ·
Calculating Average Force of Bullet Impact on Block
- Freaker
- · Replies 3 ·
Find Speed in Centripetal Motion
- petern
- · Replies 6 ·
Rigid body acceleration question
- suspenc3
- · Replies 1 ·
Calculating Force on Pillars: A Physics Moment Question
- jisaac
- · Replies 1 ·
Conservation of momentum spaceship problem
- twotoes777
- · Replies 4 ·
Kinetic energy: car stopping, finding speed of car
- enso
- · Replies 2 ·
Find Tension for Centripetal Motion
- petern
- · Replies 2 ·
Calculating Magnetic Field of Two Wires at a Point (x, y)
- twalters84
- · Replies 3 ·
Calculating Pressure from Stacked Bricks: Fluids Homework Solution
- koolkris623
- · Replies 1 ·
Calculating Wavelength of a Harmonic Wave
- sun
- · Replies 1 ·
How Do You Calculate Total Work on a Car Coasting Downhill in Physics?
- iceman90
- · Replies 4 ·
What Are the Tensions in the Cables When a Crane Lifts a Load?
- iluvschool699
- · Replies 1 ·
Understanding the Application of the Parallel-Axis Theorem
- Niles
- · Replies 2 ·
Where Has the Missing Energy in a Stretched Wire Gone?
- Iamtoast
- · Replies 7 ·
Friction in the Direction of Motion
- chrisdapos
- · Replies 2 ·
What Distance x Gives the Least Period for a Physical Pendulum?
- ghetto_bird25
- · Replies 1 ·
Momentum of bullet fired into target
- Metalsonic75
- · Replies 6 ·
Calculating Acceleration and Work in a Changing Force System: A Graph Problem
- tachu101
- · Replies 8 ·
Mechanics: mass on moving slope. no friction
- sweep123
- · Replies 2 ·
Projectile Problem: Distance and Max Height
- GusTu2007
- · Replies 1 ·
Resultant of || forces: Eng mechncs
- Edwardo_Elric
- · Replies 1 ·
Which Block Hits First, Block 1 or Block 2?
- Himanshu
- · Replies 1 ·
Extended Experimental Investigation.
- Arizzle
- · Replies 39 ·
Notation issue with the integration of exponents.
- Fallen Seraph
- · Replies 1 ·
Representing a wave as a complex number.
- Fallen Seraph
- · Replies 6 ·
How to Calculate Force on a Perpendicular Finite Wire Near an Infinite Wire?
- cscott
- · Replies 1 ·
Induction and EMF: Homework Statement Solution
- captain.joco
- · Replies 7 ·
Solve Weather Balloon Acceleration & Velocity Questions
- blue__boy
- · Replies 2 ·
Tethebal| problem, radial acceleration, angle of ball orbit
- izforgoat
- · Replies 5 ·
Elastic/inelastic collision - speed?
- rubyred401
- · Replies 5 ·
Max Elongation of Spring in 2 Mass Spring System
- -RooneY-
- · Replies 10 ·
Moon falling from rest to Earth impact speed
- brendan3eb
- · Replies 3 ·
3-dimensional center of mass problem
- brendan3eb
- · Replies 1 ·
Pivoting Rod and Ball - Rotational Dynamics
- DelPopolo
- · Replies 3 ·
How Does Increasing the Mass of the Topmost Particle Affect the Center of Mass?
- brendan3eb
- · Replies 1 ·
Work and Energy of an extreme skier
- chantalprince
- · Replies 12 ·
Trouble calculating the equilibrium of this object
- kjthesandman
- · Replies 4 ·
Inertia of unequal masses on pivoted rod
- motalha
- · Replies 3 ·
Is the Gravitational Constant Always Equal to 6.67*10^-11 in Newton's Law?
- blue__boy
- · Replies 1 ·
Weight of Astronaut on a Centripetal Shuttle
- izforgoat
- · Replies 7 ·
Equilibrium at Constant Velocity
- Tater
- · Replies 1 ·
Fluid and depth of hole problem
- ghetto_bird25
- · Replies 4 ·
How Does Light Reflect Between Two Mirrors Angled at 60.5 Degrees?
- Winzer
- · Replies 6 ·
Vibrating a 75g Bungee Cord: Standing Wave Formation
- strikingleafs01
- · Replies 1 ·
Whats The answer and reason of this?
- sufyanu
- · Replies 1 ·
Vibration and Frequency Questions
- Draco
- · Replies 3 ·
Is Momentum Conserved in a Collision Between Two Charged Planets?
- raman911
- · Replies 1 ·
What is the Critical Angle for Light Passing Through a Contaminated Lake?
- Winzer
- · Replies 8 ·
Angular speed of a falling vertical rod using energy conservation
- 7starmantis
- · Replies 26 ·
Kinetic Energy & Megaton Calculation HELP
- lloyd_lex
- · Replies 1 ·
How does the energy change in a capacitor with variable plate distance?
- chopticks
- · Replies 2 ·
Solving Elastic Collision of Blocks with Masses 12 kg and 6.8 kg
- anyone1979
- · Replies 4 ·
Electric Field of Equilateral Triangle Charge Distribution
- pinkyjoshi65
- · Replies 31 ·
Where Will the Ball Hit the Floor of the Railcart?
- supercali
- · Replies 6 ·
How Is a Child's Swing Speed Calculated Using Energy Conservation?
- bphysics
- · Replies 3 ·
Position vector relation between comet and earth
- karnten07
- · Replies 14 ·
Tension in Cable: Solving Using Trig
- ChaosCon343
- · Replies 1 ·
Modify Radius of Iron for Density Accuracy
- Ryo124
- · Replies 3 ·
Max Electric Field on 4.3mC Ring of Charge: Radius 4cm
- chopticks
- · Replies 4 ·
Overcoming friction and then some.
- anyone1979
- · Replies 6 ·
Solve Halfway Measures: Find KE at 7cm
- anyone1979
- · Replies 6 ·
Deriving the Focal Length of a Concave Mirror
- wiz0r
- · Replies 4 ·
How does a jumping bug affect the rotational dynamics of a uniform bar?
- eeriana
- · Replies 9 ·
Using a Stroboscope to Make a Propeller Appear Stationary
- rcmango
- · Replies 1 ·
Use Newtonian dynamics to find the speed at this position
- Jessikalinphy
- · Replies 2 ·
What is the angular acceleration of each wheel?
- rcmango
- · Replies 6 ·
Angular Variables and Tangential Variables
- needhelp2008
- · Replies 1 ·
The space shuttle is in a 300 km-high circular orbit
- mookie84
- · Replies 7 ·
How Do You Calculate the Angular Speed of a Fishing Reel?
- rcmango
- · Replies 6 ·