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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Choosing the Right Answers for Falling Wheel, Crate Forces, and Ammeter Readings
- chawki
- · Replies 2 ·
Why am I getting negative work when it should be positive?
- dimpledur
- · Replies 1 ·
Physics-Electric Fields: Can someone please explain this to me?
- MitsuShai
- · Replies 8 ·
Electric Potential: Two Spherical Shells
- Bryon
- · Replies 1 ·
Electric field at the surface of a Geiger counter wire
- Bryon
- · Replies 7 ·
Finding the Spring Constant: A Simple Calculation
- rola99
- · Replies 1 ·
Which Solar System Body is Hardest to Reach and What Does It Take to Get There?
- elorc
- · Replies 6 ·
Calculating Change in Electric Potential Energy with Multiple Charges
- watdawaq
- · Replies 1 ·
Finding the Electric Potential at a Point Due to Multiple Charges
- eestep
- · Replies 1 ·
What is the Path and Speed of a Proton in a Magnetic Field?
- aldaris565
- · Replies 10 ·
How Much Fuel Does a Spacecraft Use to Generate 1.5 MN Thrust?
- matramlee
- · Replies 3 ·
Charged Particle Travelling Through Electric Field
- pdeco1
- · Replies 4 ·
How Does Electric Force Balance Magnetic Force in Electron Motion?
- jimmy42
- · Replies 3 ·
Potential energy of two masses connected by 3 identical strings
- mccoy1
- · Replies 6 ·
Coulomb force on Q1 from Q2 and Q3 at fixed positions
- dantheman91
- · Replies 1 ·
Calculating Resistance in a Light Bulb
- Xels
- · Replies 2 ·
Can someone grade my practice test?
- MitsuShai
- · Replies 5 ·
The Doppler Effect: Deducing an Expression for Frequency
- jono90one
- · Replies 3 ·
Lorentz transformation and rockets
- ~Sam~
- · Replies 1 ·
Why are the units of entropy kJ mol⁻¹ K⁻¹?
- nobahar
- · Replies 11 ·
How Should Voltage Across an Inductor Be Treated in Circuit Analysis?
- cupid.callin
- · Replies 6 ·
Projective motion from a height, final velocity and horizontal distance
- benbaum
- · Replies 3 ·
Kinetics of Particles work and energy; A moving car
- sharpe_116
- · Replies 2 ·
Solving for Slope Angle from Kinetic Friction
- supraroy19
- · Replies 3 ·
Friction/acceleration of cylinder
- fw029
- · Replies 2 ·
Yo-yo's, Moment of Inertia, and Rotational Potential Energy
- conrthomas
- · Replies 4 ·
Solve Momentum Problem: 100kg Cannon+10kg Ball, 150m/s Velocity
- AnomalyCoder
- · Replies 2 ·
How to study the static friction coefficent
- elabed haidar
- · Replies 6 ·
Relative Velocity Problem - find the angle
- jtw2e
- · Replies 4 ·
Relativistic Momentum of a particle
- ~Sam~
- · Replies 3 ·
Using a simple pendulum to determine g
- Celer
- · Replies 7 ·
Wave interference on beachfront
- CINA
- · Replies 1 ·
What is the Relationship Between Induced EMF and Original Current in a Wire?
- cupid.callin
- · Replies 9 ·
How are F-number and spherical aberration related?
- russel.arnold
- · Replies 1 ·
Conservation of Momentum: Solving a Cannon Firing Problem
- AnomalyCoder
- · Replies 5 ·
Physics Conceptual Questions - Mixed
- threewingedfury
- · Replies 36 ·
Relationship between Rectilinear and Angular Motion
- smashbrohamme
- · Replies 3 ·
Relative Motion- Airplane vs radar station and tracking the displacement
- emmy
- · Replies 3 ·
Electric and Magnetic field of an electron.
- Bhumble
- · Replies 2 ·
Range of an arrow, shot BACKWARDS from a moving car
- putio_d
- · Replies 11 ·
Finding the Value of the Rolling Friction Force
- realslow
- · Replies 10 ·
Magnitude of a Net Charge within a closed surface
- fisixC
- · Replies 7 ·
Find Charge on Each Capacitor in Circuit w/ S1 Closed
- Falcons
- · Replies 7 ·
Blocks, Tension, Acceleration, Friction Problem
- trc214
- · Replies 1 ·
How can the electric potential of a dust grain in Saturn's rings be determined?
- Malgrif
- · Replies 2 ·
How Does Water Content in Ice Affect Its Latent Heat of Fusion Value?
- mopar969
- · Replies 1 ·
Acceleration and Deceleration Experiment problem
- realslow
- · Replies 2 ·
Physics 2 question velocity of electrons and voltages
- rasanders22
- · Replies 1 ·
Conservation of Rotational Momentum and changes in Rotational Speed
- physicsflunky
- · Replies 2 ·
Heat Capacity Calculation Check.
- grahamreitz
- · Replies 1 ·
What is the weight of an object with a mass of 0.5kg on a dynamometer?
- Lunny
- · Replies 2 ·
Heat engine/thermal efficiency question
- apaerie
- · Replies 2 ·
When does charge increase or decrease on a capacitor after connecting two capacitors?
- downwithsocks
- · Replies 7 ·
Model of parachute that doesn't include gravity
- hholzer
- · Replies 5 ·
Resistor needed for a 12V/10W lamp on a 24V power supply
- chawki
- · Replies 3 ·
Engineering fluid mechanics problem
- luisito424
- · Replies 1 ·
Parallel Capacitors connected to Battery then D/C
- RavageU
- · Replies 7 ·
Explosive collision initial velocity
- fernancb
- · Replies 12 ·
Why Is Work Calculated Differently for Stairs and Inclines?
- Peter G.
- · Replies 2 ·
Magnetic Force due to current Parallel Wires
- jegues
- · Replies 13 ·
Simple Harmonic Motion confusion
- knottlena
- · Replies 5 ·
Projectile motion ball throw problem
- herbgriffin
- · Replies 1 ·
Optimal Ladder Position for Painting: Friction and Wall Conditions Explained
- Myrddin
- · Replies 3 ·
Velocity in relation to Electric charges.
- ejezisek
- · Replies 2 ·
Calculating Period and Frequency of a Mass-Spring System
- tallbus1
- · Replies 2 ·
Calculating Walkway Travel Times for Passengers with Different Velocities
- Peter G.
- · Replies 2 ·
Electric potential on an infinite line of charge
- Bryon
- · Replies 3 ·
Which physics texts have COMPLETE solutions manuals
- torquemada
- · Replies 6 ·
Calculating Centrifugal Force in a "Rotor-ride
- JC Polly
- · Replies 3 ·
Calculating Resultants and Percent Error
- godkills
- · Replies 1 ·
Work with Charges and Electric Potential
- Alex G
- · Replies 4 ·
Diode voltage drop with 90 ohm resistor and 136 mA current
- Qbit42
- · Replies 16 ·
What Is the Correct Average Speed and Return Time for This Car Trip?
- dayzie
- · Replies 4 ·
Max Range Lab: Solving the Units Problem
- haxtor21
- · Replies 1 ·
How Fast Can a Satellite Traverse 1500 km Using Limited Commands?
- kosherkittens
- · Replies 3 ·
Ampere's Law to find the magnitude of the magnetic field
- toochieboy
- · Replies 2 ·
Lagrangian function of pendulum
- Grand
- · Replies 1 ·
Calculating Impulse Force in a Hockey Puck Collision
- fernancb
- · Replies 19 ·
Where Do the Magnetic Fields Cancel in the X-Z Plane?
- cupid.callin
- · Replies 16 ·
Acceleration, 1D problem, chapter 2 basically
- Asphyxiated
- · Replies 5 ·
What Causes Voltage Drops in P-N Diodes During Reverse Bias?
- quietrain
- · Replies 6 ·
Finding displacement of a drag car stopping
- CL1349
- · Replies 3 ·
Thermodynamics - Work done per unit mass
- davcrai
- · Replies 5 ·
How to Calculate Net Magnetic Force on a Current Loop?
- jegues
- · Replies 11 ·
Finding Kinetic Energy of a Rotating Object
- ttbmtk6
- · Replies 6 ·
What Is the Speed and Distance of a Ball Dropped from a Descending Helicopter?
- slappy
- · Replies 3 ·
Finding image height from a thick lens
- russel.arnold
- · Replies 1 ·
Solving without using differentiation?
- DannyPhysika
- · Replies 9 ·
How can a conductor have zero field inside when it is not in equilbrium
- flyingpig
- · Replies 5 ·
How Do You Calculate Instantaneous Acceleration Without Calculus?
- slappy
- · Replies 3 ·
Object Slowing on a Horizontal Surface after Rolling down an Inclined Plane
- Caramon
- · Replies 2 ·
Why is E field constant inside a sphere with ρ = k/r charge density?
- catz
- · Replies 2 ·
Two electrons are fired at each other
- tobywashere
- · Replies 11 ·
Capacitance Question: Charge Change in Circuit
- help1
- · Replies 1 ·
Speed of blocks connected by pulley after moving 2.70cm
- TinaChan90
- · Replies 1 ·
Electric Fields of Concentric Cylinders
- roman15
- · Replies 1 ·
Resultant Force and Direction Calculation
- godkills
- · Replies 17 ·
Finding the impulse of a hockey puck colliding with a wall
- waldosa
- · Replies 2 ·
Pressure on a wall exerted by a gas
- [V]
- · Replies 1 ·
Determine transmission of light through silver.
- Bhumble
- · Replies 5 ·