Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Find the velocity of the stone just before it hits the ground
- chwala
- · Replies 16 ·
Two blocks in contact -- find the force between them
- lola9
- · Replies 14 ·
Can You Accurately Compare Bearing Slow Down Functions?
- Kristian311
- · Replies 4 ·
Help Calculating probability between 2 limits for the ground state
- Hennessy
- · Replies 28 ·
POWER - different approach, different results
- Iamconfused123
- · Replies 23 ·
Help needed in this problem involving a spring and energy balances
- hello478
- · Replies 9 ·
How Does an Iron Deposit Affect Water Levels in Fluid Mechanics?
- germoneyswis
- · Replies 10 ·
When does Phobos collide with Mars?
- PMNIMG
- · Replies 72 ·
Calculation of torque and force on magnetic dipole near infinite wire
- zenterix
- · Replies 3 ·
Calculation of magnetic dipole moment of the Earth
- zenterix
- · Replies 8 ·
Final Charge of a Capacitor in a Circuit with Capacitors and Resistors
- Tofuwu6
- · Replies 9 ·
Does a Slowing Piano Exert More Force Than the Man Pushing It?
- mancity
- · Replies 3 ·
Why is a current ring approx a magnetic dipole from very far off?
- zenterix
- · Replies 7 ·
Where on a rigid body is a resultant force applied?
- zenterix
- · Replies 11 ·
Prove this equation for projectile motion
- Winner123
- · Replies 11 ·
How Does Stress Affect a Hollow Pipe When Force Is Uniformly Applied?
- Mohmmad Maaitah
- · Replies 6 ·
Understanding MIT's applet on sound with Fourier coefficients
- zenterix
- · Replies 3 ·
Find moment arm of resultant force of two forces applied at two points
- zenterix
- · Replies 3 ·
A sphere suspended from a cord -- Find the tension
- lola9
- · Replies 13 ·
How Is Potential Energy Converted to Kinetic Energy in Physical Systems?
- Sidhshah1234
- · Replies 6 ·
Why don't we find the angular magnification of objective lens in microscopes?
- Shreya
- · Replies 10 ·
Physics 1 Parabolic Motion Question Confusion
- Confused_Student33
- · Replies 15 ·
Acceleration in uniform circular motion is uniform or non-uniform?
- Darshit Sharma
- · Replies 55 ·
Difference between resonance in undamped vs damped mass-spring-dashpot
- zenterix
- · Replies 17 ·
Amplitude of harmonic oscillation given position and velocity
- zenterix
- · Replies 4 ·
Modeling a mass falling from one side of the Earth to the other
- zenterix
- · Replies 1 ·
Elastic Potential Energy - Positive or Negative?
- amandela
- · Replies 5 ·
How Do You Solve a Non-Equilibrium Pulley System with a 154 Degree Angle?
- ashley2024
- · Replies 10 ·
Where Did I Go Wrong in My Refraction Problem Solution?
- Florian Geyer
- · Replies 11 ·
Elastic potential energy - different methods, different results
- Iamconfused123
- · Replies 2 ·
Work Done and Acceleration (Mistaken Answers?)
- amandela
- · Replies 5 ·
Faraday's law help -- Induced EMF vs. time graph
- sdfsfasdfasf
- · Replies 7 ·
How can I find the sustain time of an electric guitar?
- Krazen017
- · Replies 7 ·
On what does gravity assist depend? (possibly with sources)
- renobueno
- · Replies 3 ·
Calculation of the magnetic field of four quarter circles
- katarameno
- · Replies 12 ·
Magnetic Field Due To Wire Of Semi-Circular Cross Section
- Aurelius120
- · Replies 5 ·
Calculate the gravitational force between these three masses
- hraghav
- · Replies 4 ·
Vectors Directions: Where is this Resultant Vector Pointing?
- Remle
- · Replies 14 ·
Momentum Physics Problem: Two astronauts throw billiard balls that collide
- in33dphysicshelp
- · Replies 8 ·
Understanding work in translation and rotation of a magnetic dipole
- zenterix
- · Replies 1 ·
Current through a circuit when the key is open
- Darshit Sharma
- · Replies 42 ·
Current flowing in an open circuit
- laser
- · Replies 9 ·
Change of internal energy during linear transformation
- TheEyeOfInnos
- · Replies 11 ·
How does one calculate the number of photons striking a surface per second?
- Danielk010
- · Replies 12 ·
Find net external work of a system w/ 2 objects w/ opposite forces
- dcmf
- · Replies 8 ·
Internal energy won't add up to 0 in cyclic process
- giraffe714
- · Replies 1 ·
Static Equilibrium Reaction Question about Fixed Point
- Grandpa04
- · Replies 3 ·
How Do You Begin Creating a PV Diagram from Complex Data?
- Samir_Khalilullah
- · Replies 21 ·
Instantaneous Acceleration Given Equation for Velocity
- amandela
- · Replies 7 ·
Minimal rotational kinetic energy for a gyroscope to precess
- Malwina
- · Replies 33 ·
How does this potential divider circuit work?
- Dr. Who
- · Replies 1 ·
Vertical Mass Spring System | Analyzing work
- I_Try_Math
- · Replies 18 ·
Understanding relative velocity in 1D elastic collision
- zenterix
- · Replies 15 ·
Stefan-Boltzmann's Law. How to apply to the Sun
- PMNIMG
- · Replies 8 ·
Why Does Surface Tension Allow Bubbles to Form Despite External Pressure?
- tellmesomething
- · Replies 3 ·
Optimizing energy expenditure over a race course in cycling
- martonhorvath
- · Replies 8 ·
Does levitation distance increase as Fg increase???
- tanmays1
- · Replies 1 ·
Sign of Work (Negative or Positive)
- Ineedhelpwithphysics
- · Replies 4 ·
Kinetic energy in center of mass reference frame
- zenterix
- · Replies 3 ·
How Can Derivatives Determine Speed in Physics Problems?
- emily-
- · Replies 20 ·
Work Pulley Problem with constant speed
- Ineedhelpwithphysics
- · Replies 2 ·
A ball is thrown w/initial speed vi at an angle 𝜃i with the horizontal
- Rudina
- · Replies 5 ·
Spinning a Bucket to measure gravity with the parabolic surface of the water
- Samir_Khalilullah
- · Replies 17 ·
Angular acceleration of plank hanging off edge with a weight
- pbnj
- · Replies 7 ·
Compare the conductance of an insoluble salt with soluble one
- Aurelius120
- · Replies 2 ·
Circuit with potential difference across battery being zero?
- zenterix
- · Replies 3 ·
How Do You Calculate Wire Extension Under Sudden Loads?
- giodude
- · Replies 15 ·
Final velocity of the barbell dropped after a dead lift
- Rudina
- · Replies 7 ·
How can I calculate the Density and Volume of a mechanical mixture (atoms)?
- bumblebee77
- · Replies 6 ·
Why do the headlights on the car become dim when the car is starting?
- zenterix
- · Replies 4 ·
Why Is Energy Released in Nuclear Decay Equal to Change in Binding Energies?
- sdfsfasdfasf
- · Replies 13 ·
Translational Equilibrium Practice problem
- hraghav
- · Replies 2 ·
Worst-case power consumed by a circuit with MOSFETs
- zenterix
- · Replies 2 ·
Flux linked with circular coil vs solenoid
- Aurelius120
- · Replies 14 ·
Can Two Particles Have Multiple Collisions in a Single Interaction?
- sdfsfasdfasf
- · Replies 17 ·
How force on atom in diatomic molecule varies with distance
- I_Try_Math
- · Replies 12 ·
Electromagnetic Induction in AC circuits
- Cal66
- · Replies 3 ·
Using energy considerations to analyse particle motion
- I_Try_Math
- · Replies 3 ·
Dragging an object: what is Fmin and magnitude of acceleration?
- tomiharv
- · Replies 3 ·
Comparison between two Tippe tops
- abrahamabraham
- · Replies 1 ·
Why does mass not affect sliding speed down an inclined plane?
- MeesaWorldWide
- · Replies 4 ·
Find the value of ##θ## and frictional force acting on the block.
- chwala
- · Replies 5 ·
Find the Tension in the cable when the lift is moving at constant speed
- chwala
- · Replies 3 ·
Using energy considerations to determine speed
- I_Try_Math
- · Replies 4 ·
Series RLC circuit connected to a DC battery
- Meow12
- · Replies 12 ·
Finding the center of mass of a piecewise function
- JorkThePork
- · Replies 5 ·
Confused by Lorentz transformation equation
- FeynmanFtw
- · Replies 36 ·
Final speed of particle far away from rings with opposite charges
- risakapal
- · Replies 9 ·
Is the Total Energy Change in a Closed System Always Zero?
- zenterix
- · Replies 8 ·
Sound absorption/Acoustuic attenuation coefficeint (α(ω)) of PVC foam?
- Marcogoodie
- · Replies 1 ·
Is potential energy defined only for internal conservative forces?
- zenterix
- · Replies 15 ·
How to Determine Temperature Difference Between Two Stars Using Spectral Lines?
- Zapped17
- · Replies 0 ·
A sphere held steady on a slope by a rope
- Theexploer
- · Replies 7 ·
Find force as a function of position: F=F(x) using v=v(t)
- MatinSAR
- · Replies 6 ·
Refractive index of seawater and a diver transmitting RF for 100 meters
- xphrnzrjh
- · Replies 3 ·
Bead sliding along wire with constant horizontal velocity -- Shape of wire?
- zenterix
- · Replies 2 ·
Forces applied to a spring-loaded gas pedal
- Theexploer
- · Replies 7 ·
Index Notation, Identity Matrix
- PhDeezNutz
- · Replies 4 ·