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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Electric potential at a point between 3 point charges
- Unemployed
- · Replies 1 ·
What is the correct method for calculating the speed of a bicycle chain?
- freeurmind101
- · Replies 6 ·
Acceleration and friction problem
- PhilCam
- · Replies 3 ·
Pressure on sides and ends of pool, given the pools dimensions and depth
- denxnis
- · Replies 3 ·
Work by gravity from lowest to highest point of vertical circle
- Charanjit
- · Replies 9 ·
Forces Problem involving acceleration and friction
- jj2443
- · Replies 1 ·
Momentum: laser beam and photons
- KL90
- · Replies 2 ·
Finding the Temp of the Sun given only 3 variables.
- MarcZero
- · Replies 1 ·
Elastic collision with 200g and 300g masses: need more initial data?
- hover
- · Replies 1 ·
Properties that determines the energy of a photon
- songoku
- · Replies 2 ·
Expressing polar unit vectors in Cartesian coordinates
- v_pino
- · Replies 1 ·
How Many Amps flow through the lightbulb
- Mr530
- · Replies 7 ·
Finding Final Velocity of Cart in Grade 12 Physics Problem
- musicfan31
- · Replies 1 ·
How Do You Calculate the Final Velocities in a 2D Coin Collision Problem?
- alphadog0309
- · Replies 1 ·
What is the speed of the skater's hands in rotational motion?
- mmbruns
- · Replies 10 ·
Solving an 1100kg Car's Work Output on a 50m Hill
- PhilCam
- · Replies 2 ·
How Do You Calculate Stopping Time and Deceleration for a Car?
- davidavado
- · Replies 1 ·
RC Circuit discharge question -
- jemitu
- · Replies 3 ·
Energy dissipated in circuit with two capacitors
- Merlione
- · Replies 3 ·
Downward-Facing Dog Equilibrium Question
- Emethyst
- · Replies 2 ·
Solving for the Angle of a Baseball's Velocity in Projectile Motion
- lev1234
- · Replies 1 ·
Inductive reactance and length of the solenoid
- Anthem26
- · Replies 1 ·
Physics II Lab - Fizeau's Experiment - Speed of Light
- dmullin4
- · Replies 6 ·
Translational/Angular Acceleartion
- albertoid
- · Replies 5 ·
Electron equations of motion through an uniform magnetic field
- libelec
- · Replies 6 ·
Value of g on Earth with a smaller radius
- Jimmy25
- · Replies 4 ·
How to Calculate Change in Wall Thickness Under Axial Compressive Load
- Biru
- · Replies 25 ·
The physics of wave properties on a string
- amandine
- · Replies 17 ·
Calculate the average recoil force exerted on the weapon during that burst.
- zhuyilun
- · Replies 3 ·
Show that A·(B×C) = B·(C×A) = C·(A×B)
- warfreak131
- · Replies 2 ·
Proof of sen² 25º + cos² 45º + sen² 65º = 3/2
- Fanekaz
- · Replies 1 ·
Work and Distance: Is Work Done Without Acceleration?
- richardbsmith
- · Replies 4 ·
Integration Problem: Solving \oint e-ax^2dx = 1/4\sqrt{}\pi/a^3
- henryc09
- · Replies 4 ·
Finding Friction force impeding boxs motion
- cleo0724
- · Replies 1 ·
Forces AND Friction AND Motion O MY
- kza62
- · Replies 7 ·
Calculating Coefficient of Friction for a Sliding Hockey Puck on Ice
- Zeal_of_Soul
- · Replies 1 ·
Force of contact between two blocks on a frictionless table
- holezch
- · Replies 23 ·
Freight car-caboose collision finding mass without velocities
- hangten1039
- · Replies 12 ·
Minimize Tension of Mass m Hanging from Cords
- munchy35
- · Replies 3 ·
Calculating a magnetic field at a given point
- fluidistic
- · Replies 8 ·
Calculating Escape Velocity on the Equator: Is It Possible?
- blost
- · Replies 5 ·
Spaceship entering pod with single rocket burn
- physnoob
- · Replies 3 ·
A puck slides a total of 12m: Problem relating kinteic friction to Newton's law
- Kat11111
- · Replies 3 ·
Is the Mass of the Second Person Required to Determine Force?
- durkmusic
- · Replies 4 ·
Solving for When Ball is 25m Above Ground
- vbillej
- · Replies 8 ·
Meaning of Gravitational Field Outside Uniform Sphere
- songoku
- · Replies 5 ·
What Causes a Motor to Draw More Current Than Expected?
- songoku
- · Replies 10 ·
Projectile motion - Finding velocity (not given time or angle)
- vbillej
- · Replies 2 ·
How Fast Does Water Exit the Sprinkler Holes According to Bernoulli's Equation?
- aliz_khanz
- · Replies 1 ·
Example where gravitational potential is zero but field intensity is nonzero
- Mandavi
- · Replies 5 ·
What Is the Coefficient of Kinetic Friction on a 40 Degree Incline?
- traffic_boy
- · Replies 2 ·
Physics 2 lab problem help needed
- carley132
- · Replies 2 ·
Current density equation with variable radius
- exitwound
- · Replies 4 ·
How Do You Calculate the Time Constant of an RL Circuit?
- pmontone
- · Replies 2 ·
Magnetic field between two long, straight wires
- exitwound
- · Replies 2 ·
What is the Correct Way to Calculate Average Force of Impulse?
- Psych Berry
- · Replies 4 ·
How Does This Basic RC Circuit Function?
- xanadol
- · Replies 1 ·
Elastic Collision: Contact Time?
- Psych Berry
- · Replies 2 ·
How Does Inductor Behavior Affect Circuit Current at t = 0.224 s?
- christianerik
- · Replies 10 ·
Newton's Third Law Tire on Road Question
- ChristPuncher
- · Replies 1 ·
Rolling puck on a spinning disk
- Mr. T
- · Replies 1 ·
Newton's 3rd law, tension, friction
- teammatt3
- · Replies 3 ·
What Are the Physical and Chemical Properties of NaOH?
- cybernet
- · Replies 3 ·
Solving for the Direction of an Airplane in a Windy Flight
- eshia5857
- · Replies 9 ·
How do I collapse a resistor circuit with series and parallel branches?
- exitwound
- · Replies 1 ·
3 balls are launched off a tall cliff with the same initial velocity
- vijaym801
- · Replies 7 ·
Calculating Frictional Force on a Ladder: Torque Problem and Solution
- pdrjuarez
- · Replies 2 ·
Nonuniform line of charge, find the electric potential
- lu6cifer
- · Replies 1 ·
What is the change in period of a pendulum with a temperature-dependent length?
- Roxanne
- · Replies 3 ·
Calculating the magnetic field
- fluidistic
- · Replies 2 ·
Solving Frictionless System: Wood Block & Projectile
- mmoadi
- · Replies 5 ·
Astronaut throws wrench to return to space station
- intriqet
- · Replies 2 ·
Falling meter stick on a frictionless surface
- harralk
- · Replies 7 ·
How to Find the Acceleration of a Block and an Inclined Plane?
- bon
- · Replies 8 ·
Where does the angle go in a free body diagram?
- smg528
- · Replies 9 ·
Period of Oscillation of a Meter Stick
- kaydubss
- · Replies 1 ·
Trajectory and Force Problem: shot putter launch
- geomajor
- · Replies 1 ·
Distance After Release- Problem on Forces
- haengbon
- · Replies 8 ·
Curious about average velocity (v bar)
- ChristPuncher
- · Replies 2 ·
Force on a car hitting a tree vs another car
- Dmitri10
- · Replies 7 ·
A car goes around a vertical circle (Uniform Circular Motion)
- Chandasouk
- · Replies 4 ·
Understanding Special Relativity: Solving for Proper Distance and Lifetime
- jdub99
- · Replies 4 ·
Finding Initial Velocity and Angle in 2D Kinematics Problem
- CocoonOHorror
- · Replies 19 ·
Integrating cos^2(x) using two methods: substitution and integration by parts
- henryc09
- · Replies 3 ·
How Do Friction, Tension, and Pulley Dynamics Affect Acceleration?
- EstimatedEyes
- · Replies 1 ·
Block resting on slop with friction - statics
- y3ahright
- · Replies 3 ·
Motion with Constant Acceleration
- JustGracie
- · Replies 1 ·
Father and Child Cart Spin: Calculating Rope Tension
- dubsydub14
- · Replies 1 ·
Calculate Speed of Exhaust Gas in Rocket Propulsion
- justin016
- · Replies 1 ·
Finding the inertia of a tilted cylinder
- undereducated
- · Replies 1 ·
Painter on a balance beam (rotational motion and Torque)
- wsc6c
- · Replies 3 ·
Disk vs ring vs block rolling and sliding down a frictionless incline
- AstraeaSophia
- · Replies 3 ·
Momentum questions - A-Level onwards standard (formulas and explanations needed)
- tomclaessens
- · Replies 9 ·
Sign of voltage across inductor
- ElectroWhat
- · Replies 3 ·
What Happens to the Puck's Speed and Trajectory after the Weight Drops?
- 2RIP
- · Replies 6 ·
Calculate the centre of mass of the object shown below
- LadyTwi
- · Replies 2 ·
Interacting Systems - The Sled Dog
- mantillab
- · Replies 6 ·
Circuit with switch resistors and capacitor
- hitman0097
- · Replies 4 ·
Why can't an observer see images 3 and 4 from two perpendicular plane mirrors?
- kenny1999
- · Replies 1 ·
Nucleus breaks into fragments with internal energy release
- henryc09
- · Replies 3 ·