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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Car crash conservation of momentum problem
- BrainMan
- · Replies 9 ·
What Is the Work Done by an External Force on a Transported Electron?
- victorializ
- · Replies 8 ·
Finding x-component of electric field from two point charges
- victorializ
- · Replies 7 ·
Horizontal spring and wood block energy and equilibrium question
- salmayoussef
- · Replies 23 ·
Why is relative velocity (v−u) not (v+u) in Doppler effect?
- kelvin macks
- · Replies 3 ·
2 masses suspended over a pulley, finding a mistake
- aquance
- · Replies 3 ·
Is My Solution to the Grade 11 Physics Problem Correct?
- taotao
- · Replies 3 ·
Sound waves (node and antinodes)
- kelvin macks
- · Replies 2 ·
The physics of rising air/bubbles displacing water below sealevel
- kihel
- · Replies 1 ·
Calculate Work Done on 2.6m Ramp w/ 220N Force
- esmeralda4
- · Replies 3 ·
Is the Velocity of Two Objects in a Head-On Collision Necessarily Zero?
- gcombina
- · Replies 6 ·
Coil placed in a time-varying magnetic field
- PKay
- · Replies 2 ·
(Problem 6) Fragments of explosion
- gcombina
- · Replies 3 ·
Lorentz Transformations problem
- Meekay
- · Replies 4 ·
Why is binding energy negative?
- drywater123
- · Replies 1 ·
Bullet conservation of momentum problem
- BrainMan
- · Replies 3 ·
Poisson's Equation in Cylindrical Coordinates
- smileandbehappy
- · Replies 3 ·
A conservation of mechanical energy and momentum problem
- BrainMan
- · Replies 11 ·
Time for object in free fall to reach bottom of reservoir
- sciencegem
- · Replies 7 ·
Engine with constant power; Time taken to finish track?
- Nathanael
- · Replies 4 ·
When does this ring leave the surface?
- hokhani
- · Replies 12 ·
Potential of a conservative force
- TanGeriN
- · Replies 4 ·
Applying 2nd Kirchhoff's Law in a Circuit: Understanding its Use and Limitations
- Jhenrique
- · Replies 4 ·
Adiabatic, Isothermal and Isochoric Processes
- jlhannah
- · Replies 1 ·
How to Find Force on an Electron Using Gauss' Law?
- ichivictus
- · Replies 4 ·
Find the potential of a fluid with varying density
- -sandro-
- · Replies 2 ·
String Wave Velocity and Tension
- Rookie
- · Replies 7 ·
Basic Q's Net Force and Acceleration
- kstbts
- · Replies 2 ·
Interference of microwave transmitters of different wavelengths
- DomPhillips
- · Replies 3 ·
Finding I(0)- and I(0)+ in First Order Circuit
- darwinharianto
- · Replies 6 ·
Potential of a Coalescing Water Droplet
- Satvik Pandey
- · Replies 7 ·
Harmonic Motion Spring Constant
- Rookie
- · Replies 9 ·
Mobile Phone Tower Question - Wave Equation and No. of Photons Per Sec
- FaraDazed
- · Replies 11 ·
Projectile problem (This is a quickie)
- gcombina
- · Replies 8 ·
Solution to Schrodinger Equation
- kdndk
- · Replies 1 ·
Calculating Average Recoil Force for Machine Gun Firing 50g Bullets
- gcombina
- · Replies 13 ·
Rolling sphere, where to start when i dont know the radius?
- bikkja
- · Replies 13 ·
Why Integrate Over Entire Conducting Rail Instead of Bar Area?
- baby_1
- · Replies 1 ·
Kinematics, forces and free body diagrams for exam
- ichigo
- · Replies 17 ·
Calculate Angle of 3.50 kg Mass on 1.59 m String Revolving at 2.99 m/s
- gummybeargirl
- · Replies 6 ·
Finding gravitational potential and intensity in point A
- aquance
- · Replies 11 ·
Wave transmission through intermediate section with integer wavelength
- albega
- · Replies 5 ·
How Do You Calculate the Density of a Partially Submerged Cube?
- AlphaLima
- · Replies 3 ·
How to Determine Final Speeds in a Glancing Collision Problem?
- BrainMan
- · Replies 5 ·
Elastic Collision in Deep Space
- Rookie
- · Replies 4 ·
How can I know when to use different trigonometric functions?
- ann
- · Replies 1 ·
How long can a ship stay in a port with a harmonic tide pattern?
- Karol
- · Replies 5 ·
Deriving the mass equation for a binary star system
- unscientific
- · Replies 2 ·
Acceleration in Kinematics: How Does it Vary with Displacement?
- ritik.dutta3
- · Replies 4 ·
How Do You Calculate the Moment When Speed Changes in a Decelerating Car?
- Danatron
- · Replies 6 ·
Find the viscosity coeffienct of glycerol, using stokes law
- RoryScanlan
- · Replies 12 ·
How Do You Solve Vector Problems in Physics?
- emjay66
- · Replies 7 ·
What is the equation of motion for the mass in this system?
- Karol
- · Replies 6 ·
Planetesimal Accretion Time Estimation
- spinnaker
- · Replies 12 ·
Simple finding linear acceleration
- mistermill
- · Replies 1 ·
How Do You Calculate Relative Velocity on a Moving Barge?
- Danatron
- · Replies 18 ·
Uniform, semicircular rod of radius R and mass m in the center
- aquance
- · Replies 17 ·
Calculating Final Speed and Kinetic Energy in an Elastic Collision
- BrainMan
- · Replies 18 ·
Gravitational potential of a sphere
- aquance
- · Replies 4 ·
How Are Distances from the Center of Mass Determined in Classical Mechanics?
- velo city
- · Replies 1 ·
Calculating resultant torque using cross product
- steffercakes
- · Replies 6 ·
Can a satellite be raised to a new orbit with two impulses in this scenario?
- fayled
- · Replies 2 ·
Does Material Expansion Impact Accuracy in Thermal Expansion Experiments?
- Myr73
- · Replies 26 ·
General Formula for Acceleration of a Disk Rolling Down an Incline
- theboomking
- · Replies 1 ·
Two planets connected by a spring no gravity
- physicsishard
- · Replies 1 ·
Wheel on a vertical plane. Find tangential speen and acceleration.
- genioaddis
- · Replies 6 ·
How to ask homework questions on Physics Forums
- brianyicheng
- · Replies 2 ·
SHM and Circular Motion Problem
- acomet
- · Replies 3 ·
What Is the Height of the Tower?
- phyphyphy
- · Replies 3 ·
Thevenin equivalent for an AC circuit
- physiks
- · Replies 10 ·
Introductory Simple Harmonic Motion Problem
- acomet
- · Replies 2 ·
How to calculate the frequency given a colour, angle, 100 slits/mm.
- Ninja_Truth
- · Replies 1 ·
Electrodynamics problem (circuit with two sources)
- Rugile
- · Replies 4 ·
How Is Acceleration Calculated in a Basic Table Pulley System?
- gummybeargirl
- · Replies 6 ·
Tennis ball's final velocity without it's initial
- danyork
- · Replies 7 ·
Multipole approximation outside conducting sphere
- usn7564
- · Replies 7 ·
Kinetic energy of meteoroid falling from rest at infinity
- spinnaker
- · Replies 3 ·
Why am I getting kg·m/s² instead of Newtons in this force problem?
- gcombina
- · Replies 2 ·
Why does a falling rock gain equal momentum each second?
- gcombina
- · Replies 7 ·
Regarding ' The Electric field inside a non conducting shell '
- Uday
- · Replies 5 ·
What is the equation for the kinetic energy of a pendulum at any point?
- velo city
- · Replies 5 ·
Planck's constant got from experiment lower than accepted value
- lkl1226
- · Replies 3 ·
How Do You Calculate Force on an Inclined Plane with and without Friction?
- questionable
- · Replies 6 ·
Why does Malus law allow transmission at angles other than 0 degrees?
- Maxo
- · Replies 7 ·
The change in entropy of the gas vs thermal reservoir
- cuongbui1702
- · Replies 1 ·
Proving that central force is conservative and getting the energy
- aquance
- · Replies 16 ·
Electromagnetism, calculation of B
- usn7564
- · Replies 2 ·
Min Period of oscillation of a rod
- Tanya Sharma
- · Replies 12 ·
Magnetic field from a conductor using Law of Biot-Savart
- Jon.G
- · Replies 2 ·
Sinusoidal pressure wave in gas: bulk modulus, wavelength, and frequency
- Plaetean
- · Replies 6 ·
Harmonics, Notes, Beat frequency
- Bengo
- · Replies 2 ·
How Fast Will an Apple Fall from a 15m Building?
- Zorric
- · Replies 13 ·
Bullet embeds in wooden block, maximum height 22 cm
- Maxo
- · Replies 11 ·
Electronic field calculation of 2 wires
- ThiagoG
- · Replies 1 ·
Why does friction work differently on a curved vs straight incline?
- Karol
- · Replies 45 ·
Force equation for pulley FBD with symmetric tension
- STEMucator
- · Replies 1 ·
Diffraction - opening smaller than wavelength
- dragon-kazooie
- · Replies 1 ·
The existance of Electric field
- cuongbui1702
- · Replies 6 ·
Spring constant and basket mass from oscillation period measurements
- Karol
- · Replies 5 ·
Finding normal force needed to push person against wall with friction
- nctweg
- · Replies 1 ·