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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Electrical stability of an atom
- lxman
- · Replies 2 ·
Finding Angle Which Cube Falls Off Sphere
- apierron
- · Replies 6 ·
Horizontal force due to tension from vertical wieght
- fatalphysics
- · Replies 1 ·
Box Problem Kinetic/Static Friction
- ilovejesus
- · Replies 1 ·
Relativity (lorentz contraction)
- Allein
- · Replies 1 ·
Springs are considered a non-conservative force why is the
- mrshappy0
- · Replies 6 ·
Experiment to Measure Average Force when Hitting Hockey ball?
- Mark Rice
- · Replies 1 ·
How Fast is C Moving Relative to B?
- Dr. Science
- · Replies 1 ·
Grade 12 Physics - Equations relating current and radius of a beam
- GR + QM
- · Replies 1 ·
Force on a dipole from a point charge?
- warfreak131
- · Replies 1 ·
Multiple Pulley/Friction system
- frostmephit
- · Replies 1 ·
Distance fallen under gravity with quadratic drag from v0 to v1
- RenaltJ
- · Replies 12 ·
How Do You Calculate the Necessary Collector Area for a Solar Water Heater?
- Ishida52134
- · Replies 3 ·
Pulling a Box of Sand: Tension and Friction
- leroyjenkens
- · Replies 3 ·
Sled pulled up incline at an angle with friction
- Strawer
- · Replies 2 ·
How to find distance given echo time. (WAVES)
- misz_sunshine
- · Replies 5 ·
How To Find Depth Given TIME ONLY
- misz_sunshine
- · Replies 15 ·
What is the correct banking for a 580m radius highway curve?
- SherBear
- · Replies 12 ·
Q4 minimum speed problem
- athrun200
- · Replies 7 ·
Optics - Two lenses touching each other with oil inbetween
- Xyius
- · Replies 6 ·
Simple Normal/Tangential Acceleration Confirmation Needed
- Griffy11
- · Replies 1 ·
True mass, different weights, and the force of gravity
- sdoi
- · Replies 1 ·
Physics 20 Waves and Motion Questions?
- mintyyf
- · Replies 1 ·
How Far Can a Girl Travel in 6 Seconds at a Speed of 3m/s?
- ross118
- · Replies 5 ·
Why is the Error Larger Than the Area in Calculations?
- athrun200
- · Replies 1 ·
Finding Forces and Work in a Pulley System
- gunni91
- · Replies 6 ·
How Do You Solve This AS Physics Kinematics Multi-Choice Question?
- seiei
- · Replies 3 ·
Conservation of energy on loop. Nearly done
- irishbob
- · Replies 2 ·
Finding the speed of a bullet via device with two rotating disks
- TmrK
- · Replies 3 ·
Calculating Power Output to Climb a 7.0 Degree Hill
- FossilFew
- · Replies 7 ·
Moment of Inertia for Combination of Rod and Ball
- TMO
- · Replies 2 ·
Calculating force for a mass in a hoop
- Smartguy94
- · Replies 1 ·
Center of mass of NH3 molecule, not quite there
- 1MileCrash
- · Replies 3 ·
Slope of Kinetic vs Potential(Spring)
- youknow789
- · Replies 1 ·
Finding total charge from volume charge density
- emr564
- · Replies 2 ·
Finding an angle of a rope swing involving Energy
- Smartguy94
- · Replies 6 ·
Finding F required pushing a box at angle (theta) for constant v
- Eats Dirt
- · Replies 1 ·
Conservation of Energy with Metal Spheres
- ZEli
- · Replies 6 ·
Acrobats trajectory with a swing
- nag
- · Replies 2 ·
I really don't understand what I'm even being asked
- 1MileCrash
- · Replies 14 ·
How Do You Calculate Initial Velocity in 2D Projectile Motion?
- Tronic
- · Replies 1 ·
RC circuit with capacitor discharging through two resistors
- iiiiaann
- · Replies 4 ·
Instantaneous Velocity statement
- Joe26
- · Replies 2 ·
Finding the Normal Force of a block
- trivk96
- · Replies 2 ·
Finding snowmobile velocities before collision using momentum conservation
- Dolce
- · Replies 1 ·
Why do different masses give slightly different K values for the same spring?
- Crusaderking1
- · Replies 2 ·
Simple sum of forces parachute problem
- kirby27
- · Replies 3 ·
How to delete or edit forum posts
- grover1213
- · Replies 1 ·
How to calculate weight an arm can curl.
- AustinMeredit
- · Replies 1 ·
How Much Force is Exerted on a Car Pulled from a Ditch?
- charlene w
- · Replies 3 ·
Working out the speed a parked car travels after a moving car hits it
- reefcake
- · Replies 2 ·
Projectile Motion Jumping Man Problem
- dj0320
- · Replies 1 ·
Finding a and B₀ for electromagnetic wave with E and B vectors
- Joe626
- · Replies 1 ·
Finding the Center of Mass for Jane's Leg Model
- lalahelp
- · Replies 1 ·
Suppose that three astronomical objects
- MakeItThrough
- · Replies 1 ·
(torque) a force needed for wheel to rise up onto box
- slambert56
- · Replies 7 ·
Tension at an angle from hanging mass
- austindubose
- · Replies 2 ·
Differential Equations with a body initially at rest
- e to the i pi
- · Replies 3 ·
Calculating Work and KE in Physics Problems
- ninapatari
- · Replies 9 ·
What is a 68kg Person's Weight on Mt. Everest?
- Phy 1
- · Replies 1 ·
Time to Reach Maximum Height of Projectile Launched at 450 m/s
- Gughanath
- · Replies 4 ·
Fluid pressure problem and units confusion
- yoshtov
- · Replies 1 ·
Pendulum Problem: Potential energy equals? kinetic energy
- smeiste
- · Replies 2 ·
Force and Motion Ferris wheel problem
- bosburn93
- · Replies 1 ·
Does mass affect the period of a pendulum attached to an elastic string?
- lphalo
- · Replies 4 ·
Simple harmonic motion of a spring mass
- Kurokari
- · Replies 2 ·
Calculate Pressure in Hydraulic Cylinder
- jezman
- · Replies 4 ·
Physical pendulum made of a uniform disk
- aigerimzh
- · Replies 6 ·
Will Both Chunks of the Split Asteroid Miss Starbase Alpha?
- diablodude64
- · Replies 6 ·
What are the key calculations for a power plant's efficiency and energy loss?
- Grigoris_Da
- · Replies 1 ·
How to Use Gauss' Law to Find Electric Field of a Charged Wire
- PrideofPhilly
- · Replies 5 ·
Hard potential energy function question
- Lucy Yeats
- · Replies 5 ·
How is electric potential related to electric potential energy?
- Lucy Yeats
- · Replies 2 ·
Force needed to stretch a steel rod with spring constant 2.1×10⁶ N/m
- antphany
- · Replies 5 ·
Thermodynamic - Work done in a system
- ibysaiyan
- · Replies 15 ·
How can I calculate the distance a car will travel after driving off a cliff?
- antphany
- · Replies 4 ·
How do you Find Gravitation Field strength
- antphany
- · Replies 2 ·
Capacitor separated by a dielectric
- EngineerHead
- · Replies 2 ·
How Do You Calculate Torque on Shaft B Given Power and Angular Speed?
- maniac90
- · Replies 1 ·
Calculating the Energy Needed to Heat Magnesium: A Challenge!
- davidray
- · Replies 1 ·
Find how long does it take to hit the ground from a car off a cliff
- antphany
- · Replies 4 ·
How Do Charges Transfer and Affect Coulombic Forces?
- paperdoll
- · Replies 6 ·
Horizontal Force to Hold Pendulum Perpendicular
- derek88
- · Replies 3 ·
Energy gap calculation for semi-conductors.
- NewtonianAlch
- · Replies 1 ·
Ball suspended in a horizontal electric field
- cdriscoll
- · Replies 10 ·
Tension in elastic cord at low point
- Opus_723
- · Replies 3 ·
Electric field of concentric conducting spheres
- emr564
- · Replies 4 ·
Elastic Collision w/ Pendulum Bobs
- paola8
- · Replies 1 ·
What is the Total Airtime of an Arrow Shot Straight Up at 20m/s?
- antphany
- · Replies 4 ·
Calculating Distance Traveled: Car Speed and Cliff Jump Duration
- antphany
- · Replies 1 ·
Internal energy change for H2 dissociation to atomic hydrogen
- Dr. Science
- · Replies 8 ·
Using Hooke's law to find the pull back distance?
- grover1213
- · Replies 1 ·
Changing Mass and Constant Force: Is it Really That Simple?
- athrun200
- · Replies 2 ·
How does the volume of air in the lungs change with temperature?
- iastate51
- · Replies 1 ·
Diffraction through a single slit
- Cade
- · Replies 2 ·
How Does an RC Circuit Behave During Charging and Discharging?
- pyroknife
- · Replies 3 ·
Verifying α(t) = α₀ cos(√(g/l) t) solves the differential equation
- danpab
- · Replies 7 ·
Finding t for projectile motion without initial velocity
- vsindorf
- · Replies 1 ·
Finding K in a two spring system.
- youknow789
- · Replies 5 ·
Adiabatic process - Diesel engine
- ibysaiyan
- · Replies 6 ·