Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Ball swinging in vertical circle: tangential and radial acceleration
- phoenix20_06
- · Replies 8 ·
How Much Work Is Done on a Lift Pulled Up by a Cable?
- Full Beige
- · Replies 10 ·
A question on second law of thermodynamics
- ky92
- · Replies 5 ·
Rotating square coil in constant magnetic field
- snufkin
- · Replies 2 ·
Tension in string for ball whirling in vertical circle
- tatsalez
- · Replies 3 ·
[High school physics] Wheel touching a kerb. What are the forces on the wheel?
- Nanyang
- · Replies 4 ·
Calculate Potential Energy of Electron in Bohr Model
- roshan2004
- · Replies 5 ·
Completing Nuclear Reactions: Balancing Charges and Nucleons
- phys62
- · Replies 2 ·
4 resistors in series and parallel
- abruski
- · Replies 5 ·
What is the Force Acting on a Particle with Changing Velocity?
- Doonami
- · Replies 5 ·
How Far Does a Helium Balloon Stretch a Spring?
- ~christina~
- · Replies 8 ·
Solving Mass-on-Scale Problem with Falling Chain
- Dweirdo
- · Replies 4 ·
Formula involving the change in a kinetic energy
- electrical_ck
- · Replies 3 ·
Circuit Analysis: My Solution to Problem in Figure
- rootX
- · Replies 3 ·
Calculating Wind Velocity: Solving for Magnitude and Direction
- Chocolaty
- · Replies 4 ·
How Can I Calculate the Coefficient of Thermal Expansion for a Material?
- satchmo05
- · Replies 5 ·
What Is the Correct Derivation of Torricelli's Law?
- fluidistic
- · Replies 1 ·
Why is my spring graph curved while the elastic band is straight?
- NakedNoodles
- · Replies 2 ·
Longest Wavelengths in 128 cm Tube: Open at Both/One End
- spokorne
- · Replies 1 ·
Surface tension calculation problem
- the-matrix
- · Replies 3 ·
Relative motion -cheetah and gazelle
- Kristin_Z
- · Replies 2 ·
Time dilation: which is proper time and which is dilated time?
- Jbum
- · Replies 5 ·
Hohmann transfer orbits (delta-v)
- louischaman
- · Replies 5 ·
Electron exiting magnetic field region in semicircular path
- lmlgrey
- · Replies 1 ·
Energy Stored in Magnetic Field of Solenoid
- x^2
- · Replies 2 ·
How long does the wheel slip before it begins to roll without slipping?
- PatF
- · Replies 3 ·
What Is the Electric Field at Various Distances From a Charged Spherical Shell?
- 22steve
- · Replies 1 ·
Can I open xml files as text documents?
- renob
- · Replies 2 ·
Electric field of a coaxial conducting rod and shell
- 22steve
- · Replies 3 ·
How Is Electric Flux Calculated for a Charged Sphere?
- 22steve
- · Replies 1 ·
Force between two steel blocks connected by a string
- drinkingstraw
- · Replies 2 ·
Determine the net charge contained within the cube
- 22steve
- · Replies 4 ·
Force is mass times accelaration Question inside
- kunal.janu
- · Replies 2 ·
Velocity from a force time graph
- TheFluffyDuck
- · Replies 6 ·
Oscillations and mechanical energy
- Knfoster
- · Replies 4 ·
Normal force, friction and torque on a segway accelerating forward
- tnutty
- · Replies 7 ·
Finding spring constant k from period squared vs mass graph
- crankine
- · Replies 6 ·
Boyle's Law: Calculating Balloon Size at Surface After 40 m Descent
- 9giddjl
- · Replies 2 ·
Motional emf problem on inclined plane
- yankans
- · Replies 1 ·
When will one car overtake the other? (acceleration,veolcity,time)
- drinkingstraw
- · Replies 8 ·
Velocity,time,acceleration question
- drinkingstraw
- · Replies 1 ·
Maximum current amplitude in RLC circuit
- John 123
- · Replies 10 ·
Finding friction force for a braking car with known acceleration
- drinkingstraw
- · Replies 3 ·
How To Calculate Energy Of A Child On A Slide?
- AlphaRock
- · Replies 2 ·
Resistance effecting current through Voltmeter
- GDGirl
- · Replies 3 ·
How High Does Tarzan Swing From Point A to B?
- samiha.shakil
- · Replies 1 ·
Finding the unknown resistor using only an ohmmeter
- abeilleqc
- · Replies 5 ·
Spherical Mirrors an ray diagram
- Pius
- · Replies 2 ·
Capacitor (currents, resistors, etC)
- nlsed
- · Replies 2 ·
How Can Bessel's Method Determine the Focal Length of a Lens?
- w3390
- · Replies 9 ·
Calculating Momentum of a Falling Mass: 30.00 kg Object from 4.00m Height
- ckaiser813
- · Replies 3 ·
Angular Momentum of each particle about the origin
- joemama69
- · Replies 8 ·
Special relativity problem (conceptual)
- FuzzyDunlop
- · Replies 2 ·
Ice added to Water (heats of rxn)
- aqwsde
- · Replies 1 ·
Understanding Microscopic Ohm's Law
- ed2288
- · Replies 2 ·
Can You Measure Terminal Velocity in a Classroom Experiment?
- Monroe
- · Replies 1 ·
How Do Size and Movement Direction of Insects Affect Bat Echolocation?
- m.l.
- · Replies 1 ·
Maximum friction force before slipping occurs
- electricblue
- · Replies 5 ·
What is the period of a damped oscillator with given parameters?
- Full Beige
- · Replies 7 ·
Conceptual Questions Fluids and Simple Harmonic motion
- vivekfan
- · Replies 1 ·
Projectile breaks into two pieces at top of trajectory
- Koskesh
- · Replies 1 ·
How Do You Calculate Kinetic Energy and Frequency in Harmonic Motion Problems?
- nns91
- · Replies 1 ·
Reaction force between a Sphere and particle
- nokia8650
- · Replies 2 ·
How does the mass on a horizontal spring behave?
- mattmannmf
- · Replies 1 ·
How Does Simple Harmonic Motion Affect Velocity and Energy in a Spring System?
- mattmannmf
- · Replies 1 ·
Calculating Distance with Sound Waves
- whitehorsey
- · Replies 4 ·
Calculating Remaining Kinetic Energy After Excited State
- fball558
- · Replies 3 ·
Thermo/Fluids Research Paper Idea
- Yander
- · Replies 1 ·
Converting Btu to J using water heat capacity
- phrygian
- · Replies 5 ·
A few easy conceptual questions
- chops369
- · Replies 1 ·
Why Is the Buoyant Force Added to the Decelerating Force in Diving Physics?
- 2710
- · Replies 1 ·
Linear Impulse - Jackhamer Rebounds
- joemama69
- · Replies 13 ·
How Do You Calculate the Effective Half-life of a Radioactive Isotope?
- larianne
- · Replies 1 ·
Finding current and voltage across each 2Ω resistor in series-parallel circuit with 9V
- Missvux3
- · Replies 13 ·
Proving total energy equals (1/2)k(ΔL² + A²) for spring-mass system
- mathilin
- · Replies 13 ·
Where does the extra r come from in the Kepler's first law proof?
- rg057
- · Replies 4 ·
Calculating Chain Velocity Through Point Particle System
- fball558
- · Replies 1 ·
How Large is the Activity of I_131 After 2 Days?
- soopo
- · Replies 1 ·
Electron double slit diffraction with unequal widths
- JJ6
- · Replies 3 ·
Two charged spheres suspended from same point repel
- Procrastinate
- · Replies 2 ·
Calculating Force Between Three Insulated Conductors with Equal Charges
- Procrastinate
- · Replies 2 ·
Find electric field produced at point P, along perp. bisector
- Nick-
- · Replies 1 ·
Friction force on a sphere rolling without slipping down a ramp
- zcdfhn
- · Replies 2 ·
Collision response of two object
- knonk
- · Replies 5 ·
Doppler Effect frequencies Question
- almeidamyers
- · Replies 1 ·
How Do You Calculate the Speed of a 20Hz Longitudinal Wave with 0.4m Wavelength?
- whitehorsey
- · Replies 2 ·
How Is Energy Conserved in a Photon-Electron Collision?
- Phoenixtears
- · Replies 1 ·
How Do You Calculate Average Volume Charge Density in a Layer of Air?
- kevinf
- · Replies 3 ·
Rotational motion and law of gravity
- wowdusk
- · Replies 4 ·
Why Do Longer Wavelengths Diffract More Than Shorter Wavelengths?
- Yuqing
- · Replies 1 ·
Calculating Final Velocities of Elastic Collision in 2D
- Auras
- · Replies 3 ·
How Do You Calculate the Translational Velocity of a Ball on an Incline?
- blink1987
- · Replies 1 ·
Calculating Punch Force to Break Concrete Slab
- cybernerd
- · Replies 1 ·
Projectile Launch - Using Earth's Radius
- bustin
- · Replies 3 ·
Ring rolling 1.0 m at 3.0 m/s - how many revolutions?
- blink1987
- · Replies 1 ·
How Many Oscillators in a Carbon Nanoparticle with 5000 Atoms?
- yoyoz41
- · Replies 8 ·
Calculating Microstates and Oscillators in a Collection of Objects
- fball558
- · Replies 5 ·
Number of oscillators in carbon nanoparticle using Einstein model
- fball558
- · Replies 4 ·
Simple angular acceleration problem
- joseg707
- · Replies 1 ·