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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Energy of a mole of photons at 522nm wavelength
- McMaster_Girl
- · Replies 1 ·
Brief explanation of what entropy is?
- Benny
- · Replies 8 ·
How Does Force Affect Javelin Momentum and Speed?
- almost__overnow
- · Replies 2 ·
Center of mass of the human figure
- shaka23h
- · Replies 9 ·
Solve Kinematics Problem Involving Free Fall Acceleration
- ubiquinone
- · Replies 9 ·
Torque excerted on the support by a mass
- mikefitz
- · Replies 2 ·
Projectile Motion Calculations: Ship's Shot at an Enemy Ship and Island Peak
- lucianman24
- · Replies 2 ·
Is There Buoyant Force at the Base of an Object in Water?
- kindaichi
- · Replies 26 ·
Calculating Tension and Motion in a Three-Box and Pulley System
- mbrmbrg
- · Replies 3 ·
Fireworks rocket breaks into two equal pieces at 30° and 60°
- bananan
- · Replies 2 ·
What is the tension in the cords of two hanging paint buckets?
- chocolatecello
- · Replies 2 ·
Calculating Kinetic Energy in Alpha Decay: Thorium to Radon Nucleus
- Soaring Crane
- · Replies 2 ·
Coefficient of friction on a 30-degree incline
- demode
- · Replies 13 ·
What Potential Difference Will Cause the Thread to Assume a 30° Angle?
- kuwaiteng
- · Replies 2 ·
Particle dropped on platform with spring - Compression of springs
- rasa
- · Replies 1 ·
Max height given angle and distance
- agentnan
- · Replies 1 ·
Tension between two hanging masses connected over a pulley
- ubiquinone
- · Replies 8 ·
Launching a projectile into Orbit
- Noone1982
- · Replies 5 ·
Average frictional force and initial velocity of pellet
- glasgowm
- · Replies 7 ·
Force on a diving board, work to stop a flywheel
- lizzyb
- · Replies 9 ·
Explanation of how a capacitor works?
- joker_900
- · Replies 1 ·
Projectile Motion - Incline Plane
- Harmony
- · Replies 2 ·
Impulse Momentum Theorem and space probe
- shaka23h
- · Replies 3 ·
How to Calculate Vmax in a Circuit Equation?
- Alt+F4
- · Replies 1 ·
How Much Force Must a Bicyclist Apply to Climb a Hill at Constant Speed?
- spoonthrower
- · Replies 3 ·
Coefficient of static friction question
- Angelofhappiness
- · Replies 6 ·
Why is acceleration squared in kinematic equations?
- newb
- · Replies 9 ·
Spring compression distance from a block sliding down a ramp
- Reverend Lee
- · Replies 5 ·
Understand Rotational Inertia for AP Physics C
- GoldPheonix
- · Replies 4 ·
Solving A = (B + C) / D - Isolate for C
- Dazed
- · Replies 3 ·
Faraday's Law and magnetic field
- erik-the-red
- · Replies 2 ·
Car crash collision calculation
- AFG34
- · Replies 2 ·
What Is the Correct Angular Speed for Doubling the CD's Kinetic Energy?
- UCrazyBeautifulU
- · Replies 4 ·
How to Solve a Tension-Pulley Problem with Acceleration and Force
- Nemi
- · Replies 3 ·
Proving the Law of Conservation of Energy Using a Pendulum
- physicsgal
- · Replies 10 ·
Action/reaction pair Newton's law
- moomoocow
- · Replies 3 ·
Understanding Forces and Acceleration in Newton's Laws of Motion
- app
- · Replies 6 ·
What is the acceleration experienced by the puck?
- petal5
- · Replies 13 ·
How to derive the kinetic gas equation?
- loom91
- · Replies 17 ·
How Fast is the River Flowing in the Fisherman's Problem?
- PPonte
- · Replies 2 ·
Suvat Question - seemingly too little info
- TicTac2
- · Replies 3 ·
Calculating Line Strength to Stop a Salmon
- cd80187
- · Replies 27 ·
How Do You Calculate the Energy of an Electron Beam in an Electron Gun?
- joker_900
- · Replies 1 ·
Calculating Work Done by a Rope on a Sled
- kbyws37
- · Replies 5 ·
Charge density, electric fields
- glid02
- · Replies 3 ·
How Do You Derive the Differential Equation for a Parallel RLC Circuit?
- piano.lisa
- · Replies 18 ·
A problem about spring constant
- katie7la
- · Replies 3 ·
Finding tension in tarzan swing
- vu10758
- · Replies 7 ·
Circular motion with tangential acceleration
- vu10758
- · Replies 3 ·
Calculating Acceleration on a Slope with Friction Coefficients
- Fusilli_Jerry89
- · Replies 9 ·
What is the total rotational kinetic energy of the wheels?
- brncsfns5621
- · Replies 3 ·
How Do I Calculate the Average Force Exerted on Bicycle Pedals?
- Liatana
- · Replies 3 ·
Speed and Mechanical Energy Lost in Railroad Car Collision
- TrippingBilly
- · Replies 3 ·
How Do You Determine the Spring Constant with Mass and Displacement?
- kbyws37
- · Replies 4 ·
Elastic potential energy of two blocks of mass
- TrippingBilly
- · Replies 7 ·
What is the Maximum Mass that Can Be Hung Before the Block Moves?
- Destrio
- · Replies 7 ·
Simple Laws of motion question
- faamfwvame
- · Replies 3 ·
Applications of vector dot product in physics
- Laossi
- · Replies 3 ·
How Far Does a Coin Roll Before Stopping Given Its Angular Deceleration?
- physics1234
- · Replies 6 ·
How do I apply Kirchhoff's laws to find current direction and EMF signs?
- junior_J
- · Replies 6 ·
Solving the Length of Ramp for a Box Weighing 200N
- perryrb
- · Replies 7 ·
Spring Constant of ping-pong ball
- brncsfns5621
- · Replies 3 ·
Applied force on 3kg block with 2kg block on top
- ubiquinone
- · Replies 5 ·
How do you find the energy of accelerated electron beams?
- joker_900
- · Replies 1 ·
Calculating Air density as a function of height?
- Noone1982
- · Replies 2 ·
How can I calculate cos^2(53)?
- Hollysmoke
- · Replies 3 ·
Physical device with both inductance and resistance
- kiwinosa87
- · Replies 2 ·
Paraglider acceleration problem
- spoonthrower
- · Replies 2 ·
Railroad engine coupling with flatcar at 5 km/h
- almost__overnow
- · Replies 7 ·
How Is Compression Distance Calculated in a Friction-Affected Spring System?
- rmc112
- · Replies 9 ·
Calculate Skier's Horizontal Distance on Frictionless Incline: Energy Question
- parwana
- · Replies 7 ·
How Is Tension Calculated Between Train Cars During Acceleration?
- spoonthrower
- · Replies 1 ·
How Is Force Calculated on Bicycle Pedals When Cycling Uphill?
- juliorgonzalez
- · Replies 1 ·
Calculating Work Done by a Force Using Integration
- amcca064
- · Replies 10 ·
Max Force Applied to System of Two Masses Connected by Rope w/o Breaking
- vu10758
- · Replies 4 ·
A problem involving two velocities (special relativity)
- raul_l
- · Replies 3 ·
Heat to warm 4 kg ice from -20°C to 10°C including melting
- Sabres151
- · Replies 5 ·
Why can't I understand the right hand rule for magnetic fields?
- Alt+F4
- · Replies 2 ·
Potential and kinetic energy of a mass between two springs
- Kaizer6
- · Replies 3 ·
How Do You Calculate the Constant k for a Bungee Jump Rope?
- student85
- · Replies 4 ·
Conservation of energy - pendulum
- Treefrog123
- · Replies 1 ·
Solving a Motor Lift Problem: Find Out What You Need to Do
- Liatana
- · Replies 4 ·
What makes a force conservative or non-conservative?
- JasonAdams
- · Replies 3 ·
What does the 1 significant digit rule mean in this frequency calculation?
- Dazed
- · Replies 7 ·
Power needed for motorcycle going uphill at constant speed
- cheechnchong
- · Replies 15 ·
Pendulum problem in KE chapter
- esinn08
- · Replies 3 ·
Newton Third Law general equation
- bigredd87
- · Replies 7 ·
Constant velocity and acceleration problem
- rcmango
- · Replies 3 ·
Speed of m3 in pulley system after moving 2.5 m
- BunDa4Th
- · Replies 11 ·
How much does a dart drop over 4 m at 7 m/s with -0.3 m/s² acceleration?
- petuniac
- · Replies 5 ·
How Does Friction Affect the Acceleration of a Rolling Cylinder?
- John O' Meara
- · Replies 10 ·
Circular Motion of a car on a curve
- FossilFew
- · Replies 3 ·
Solving Physics Problem 4: 24840 N/C?
- Alt+F4
- · Replies 1 ·
Single slit diffraction, from an angle
- mooshasta
- · Replies 1 ·
Projectile motion lab conclusion review: 0.23% error
- NIZBIT
- · Replies 1 ·
Simple Energy Problem Im missing something
- Stevedye56
- · Replies 3 ·
Trig. identities method problem
- DAZZLED
- · Replies 2 ·
Calculating Work Done in a Closed Piston Cylinder Device with V^1.2 = Constant
- junglep
- · Replies 3 ·
Circular Motion and speed of mass
- vu10758
- · Replies 2 ·
Finding direction of resultant from 60N east and 40N north
- caityjo
- · Replies 10 ·