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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How can friction force tell if an object is moving?
- utube9195
- · Replies 8 ·
Calculating Coulomb Forces Between Point Charges
- Sneakatone
- · Replies 5 ·
Average speed for half distance vs half time at different speeds
- emlekarc
- · Replies 6 ·
Calculating the Force between Hydrogen Atoms using Potential Energy
- ubermuchlove
- · Replies 8 ·
Stopping a car before collision
- hav0c
- · Replies 1 ·
What are the strength and direction of the electric field
- SIL3NTK0D3R
- · Replies 2 ·
What are the dimensions of intensity?
- Old Guy
- · Replies 1 ·
Why is my solution for real diode analysis wrong?
- theBEAST
- · Replies 5 ·
Can a circuit have parallel paths if the resistors aren't parallel to each other?
- Coco12
- · Replies 11 ·
Work at constant velocity conundrum
- FistLength
- · Replies 8 ·
Average acceleration of skidding car at 30 degree angle
- negation
- · Replies 15 ·
What is the Final Temperature When Ice, Water, and an Iron Container Interact?
- declan.B
- · Replies 13 ·
Vector Addition: Solving for C→ in A→+B→+C→=0
- negation
- · Replies 1 ·
Calculating Work Done by Upward Buoyant Force on Hot Air Balloon
- azhang40
- · Replies 1 ·
How to identify variables in kinematic equations problems
- emlekarc
- · Replies 2 ·
Determining Displacement and Direction of Sailboard During Wind Gust
- negation
- · Replies 16 ·
Calculating Pressure of a Dilute Gas in Space
- Bashkir
- · Replies 4 ·
Circuit Question - Combining/Redrawing Circuits
- Miike012
- · Replies 3 ·
Water poured into leaky container
- jdawg
- · Replies 13 ·
Conservation of Energy and Angular Momentum in a Satellite Breakup
- peripatein
- · Replies 9 ·
Energy conservation in a figure skater's waltz jump
- Cschurch
- · Replies 2 ·
Conducting bar in a uniform magnetic field
- lovelyrwwr
- · Replies 13 ·
Unit conversion with density of gold
- jdawg
- · Replies 9 ·
What is internal energy and how is it defined in thermodynamics?
- princejan7
- · Replies 2 ·
Calculating Speed from Energy Arguments?
- harujina
- · Replies 6 ·
Bug on a hinged square metal frame
- Saitama
- · Replies 18 ·
Beta particle interaction with matter
- nilic1
- · Replies 3 ·
Acceleration vector of an object (answer check)
- negation
- · Replies 4 ·
Ball thrown up, find max height - Given one velocity in midflight
- ichivictus
- · Replies 4 ·
Can You Use P = VI to Calculate Power Output in a Load with Changing Current?
- Coco12
- · Replies 8 ·
Charged particle final position equation
- degausser
- · Replies 7 ·
Does Depth Affect the Hovering of a Neutrally Buoyant Object?
- georgejeff
- · Replies 9 ·
Thermodynamics- Work done- Adiabatic process
- kaundinya
- · Replies 2 ·
Maximum Load question given Safety factor
- bad at math gu
- · Replies 2 ·
Projectile motion: determine launch angle
- justsway17
- · Replies 3 ·
Ball performing small oscillations within a hollow cylinder
- peripatein
- · Replies 33 ·
Energy Density of Blackbody Radiation
- stefan10
- · Replies 1 ·
Moment of inertia formulas for pulley and composite system
- ktvphysics
- · Replies 3 ·
Anyone can check whether my answer is correct regarding friction?
- cracktheegg
- · Replies 3 ·
Wind velocity and aircraft (answer check)
- negation
- · Replies 3 ·
Charge after three time constants?
- Keeeen
- · Replies 1 ·
What Is the Angle of Incidence for Light to Emerge Parallel from a Sphere?
- JonNash
- · Replies 2 ·
Useful use of the wave equation
- Apothem
- · Replies 1 ·
Finding the angle between acceleration and velocity vectors in circular motion
- negation
- · Replies 41 ·
D'Alembert's Principle:- A Falling Box
- Meekin
- · Replies 1 ·
Special Relativity quick problem
- binbagsss
- · Replies 7 ·
Find Electric Field Magnitude at Center of Charged Semi-Circle
- cp255
- · Replies 1 ·
How to find initial velocity given distance and angle
- tsukuba
- · Replies 8 ·
Torque balance with unequal masses on a 90 cm beam
- Heisenberg52
- · Replies 1 ·
Electric field inside a uniformly charged spherical shell
- hokhani
- · Replies 7 ·
Calculating Velocity of a Free-Falling Object
- bad at math gu
- · Replies 2 ·
Finding angular acceleration when wheel makes 90 revolutions in 60 seconds
- KiNGGeexD
- · Replies 8 ·
Energy lost to friction with constant friction torque
- johnschmidt
- · Replies 2 ·
Are these resistors in series or parallel?
- ainster31
- · Replies 3 ·
Sled momentum when Susan lands vertically and falls sideways
- oneman49
- · Replies 10 ·
Charged conductor in electrostatic equilibrium
- yoyo311
- · Replies 2 ·
Understanding Basic Algebra: Rearranging Equations and Solving for Variables
- AstroIreland
- · Replies 5 ·
Direction of car's average acceleration vector as it turns
- negation
- · Replies 8 ·
How Does the Hour Hand's Velocity and Acceleration Change from Noon to 6pm?
- negation
- · Replies 32 ·
What is the Direction of the Particle Velocity in a Traveling Wave?
- BMcC
- · Replies 2 ·
Equation for Centre of Gravity of a Hollow Conical Frustum
- Dave442
- · Replies 10 ·
Finding q1 when q2 is in equilibrium with charges 10 cm and 20 cm apart
- jfusion
- · Replies 7 ·
Rotational motion and an incline
- Strontium90
- · Replies 6 ·
Electric Charge/Gravitational Pull
- KTiaam
- · Replies 5 ·
Finding vector C from 2A + 7B + 4C = 0
- ichivictus
- · Replies 3 ·
Block Hitting Spring: Time to Travel x=0 to x1
- Tanero
- · Replies 27 ·
How Do You Calculate Input Signal from Analog Meter Readings?
- KTiaam
- · Replies 8 ·
How Can We Calculate Displacement and Average Velocity for a Complex Trip?
- negation
- · Replies 4 ·
What is the induced electric field in a wire of radius R?
- decerto
- · Replies 7 ·
Moment of Inertia question (dead simple)
- heyall
- · Replies 3 ·
What is the significance of h in relation to finding the distance AB?
- princejan7
- · Replies 3 ·
Calculate Deutron Mass Given Binding Energy
- basenne
- · Replies 3 ·
Projectile lands on an incline.
- moria
- · Replies 10 ·
How Is the Speed of Contact Point B Calculated in Rod and Block Dynamics?
- Saitama
- · Replies 11 ·
Degrees of freedom for a coin balanced on its edge
- binbagsss
- · Replies 14 ·
Astronaut at centre of tetrahedron
- Saitama
- · Replies 36 ·
Rotational Collision Door Problem
- megatyler30
- · Replies 7 ·
Calculating Acceleration of a Sled on an Incline with a Pulling Dog
- ThatDude
- · Replies 4 ·
Acceleration of a Charged Particle in 3D Vector Notation
- cactusblanket
- · Replies 12 ·
Electron launched at an angle in a parallel plate field.
- Esoremada
- · Replies 5 ·
Why Can't We Calculate Work Done by Friction?
- alingy1
- · Replies 20 ·
Finding the direction of a rotated x'-axis after three 45° rotations
- Genericcoder
- · Replies 7 ·
Axial B field from disc of charge
- CAF123
- · Replies 15 ·
Finding the Power Loss Through a Transmission Line
- Larfleeze
- · Replies 4 ·
Nonuniform circular motion question
- alingy1
- · Replies 4 ·
Free-body diagram velocity vector
- alingy1
- · Replies 2 ·
How to Determine the Mass of Bananas Using a Spring Scale
- Boxlife27
- · Replies 8 ·
Signal to noise ratio for thermal and shot noise
- Outrageous
- · Replies 4 ·
What is the World Line Diagram for Light Pulses in Two Frames?
- Andy93
- · Replies 2 ·
Proving an exponential function obeys the wave equation
- LiamG_G
- · Replies 6 ·
Finding total energy in 1.15 kg mass oscillating as x = 0.650cos(8.40t)
- hstone
- · Replies 5 ·
Equations of motion - trouble with signs
- fayled
- · Replies 11 ·
Force on 1.0 nC charge from two other charges using Coulomb's law
- lucer95
- · Replies 1 ·
Relative Velocity Motorboat Problem
- rajumahtora
- · Replies 3 ·
Newton's Laws of Motion : Block Problem
- rajumahtora
- · Replies 4 ·
As Simple Hoist System Problem - Given Answer Wrong?
- MechEngJordan
- · Replies 2 ·
Rate of Heat Transfer for a Two-Layer System
- PotatoMerchant
- · Replies 1 ·
Simple spring-constant equation
- Bindle
- · Replies 8 ·
How Do You Calculate the Ramp Angle with a 50N Force?
- vongola13th
- · Replies 12 ·
Super elastic collision between two objects
- noffya
- · Replies 4 ·