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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Moment of Inertia of slender rod
- Amar.alchemy
- · Replies 16 ·
Change in kinetic energy Velocity not given
- rock_star
- · Replies 3 ·
Kinetic Friction of ride down a ramp
- MarineBio
- · Replies 5 ·
Newton's Third Law of Motion and car collision
- Ki-nana18
- · Replies 4 ·
The Electric Field: Understanding its Negative Gradient
- jeff1evesque
- · Replies 5 ·
How Do You Calculate the Minimum Coefficient of Friction for a Banked Curve?
- nickmai123
- · Replies 1 ·
Deflection of a particle between two plates
- sw1mm3r
- · Replies 10 ·
Mean free path at low temperatures
- Armandito
- · Replies 1 ·
Electric Field of a Spherical Shell w/ Uniform Charge Density
- bodensee9
- · Replies 5 ·
How can I graph the current and voltage values for a diode using Ohm's Law?
- JakePearson
- · Replies 2 ·
Finding Length with rpm and static friction
- orange03
- · Replies 7 ·
What Is the Average Force Exerted by Water on a Diver?
- xicedcandyx
- · Replies 9 ·
A pole, 2 lightyears in length - conceptual question
- vorcil
- · Replies 46 ·
What questions can you use the quadratic formula for?
- JakePearson
- · Replies 4 ·
Weight of a 1.02m x 2.05m Door Supported by Two Hinges
- guille1
- · Replies 1 ·
Finding electron speed in ionized helium using Coulomb's law
- ken19
- · Replies 1 ·
Coin dropped in moving car: forces, acceleration, and reference frames
- graphicer89
- · Replies 4 ·
How Does Capacitor Configuration Affect the RC Circuit Time Constant?
- runfast220
- · Replies 2 ·
Which way would the tricycle go?
- MarkChoo
- · Replies 3 ·
Force on Loop Due to Infinite Wire?
- zd1899
- · Replies 9 ·
Calculating Average Thrust Force for Airplane Take-off
- BlueOwl
- · Replies 4 ·
Acceleration of the system and the tension T in the string
- blackboy
- · Replies 2 ·
Car on banked curve with Friction
- luckee
- · Replies 1 ·
Solving Word Problem: Elevator Acceleration of 145 lb to 122 lb
- BlueOwl
- · Replies 5 ·
How to Determine Dimensional Formulae?
- JakePearson
- · Replies 10 ·
Find frequency and period of oscillation
- gpat
- · Replies 1 ·
How to prove this equation mathematically (light / optics)
- Daisuke
- · Replies 5 ·
Magnitude of tangential and normal acceleration vectors
- jeff1evesque
- · Replies 1 ·
Why Does the Second Harmonic Frequency Double in a Fixed Rope?
- test2morrow
- · Replies 1 ·
Heat and Mass: Raising Ice and Water Temperatures
- test2morrow
- · Replies 1 ·
Minimum thickness of antireflective coating for 661 nm light
- OsDaJu
- · Replies 3 ·
Wavelength of surface waves in terms of surface tension, density and frequency
- pisiks
- · Replies 1 ·
Force Vector Problem: Find Magnitude of Force on Rider from Motorcycle
- Elmnt
- · Replies 4 ·
Finding sphere radius containing 90% of field energy from charged shell
- bodensee9
- · Replies 5 ·
Spinning flywheel on rotating table with springs (Kleppner 7.2)
- Sam_Goldberg
- · Replies 8 ·
Easier Way to Simplify log_3 3x?
- JakePearson
- · Replies 1 ·
How to Simplify Logarithmic Equations?
- JakePearson
- · Replies 4 ·
What is the thickness of the paper in this interference experiment?
- Matt1234
- · Replies 1 ·
Circular orbit VS Elliptical orbit? Differences?
- graphicer89
- · Replies 2 ·
Proving Horizontal Component of Tension in Stationary Chain
- RoyalCat
- · Replies 2 ·
What Is the Period of a 50-g Weight in Uniform Circular Motion?
- Paulbird20
- · Replies 12 ·
Projectile launched vertically from Moon: altitude at 3/4 initial speed
- tgvaughn
- · Replies 8 ·
Calculate Torque in 12.2m Crane - 18kN Load, 67kN Tension
- xicedcandyx
- · Replies 5 ·
Specific heat capacity
- fani98
- · Replies 1 ·
Exponential relationships to logarithms and straight line graph?
- JakePearson
- · Replies 2 ·
Power of atmosphere and skyscraper windows?
- graphicer89
- · Replies 5 ·
How Does Velocity Affect String Tension in Circular and Parabolic Motion?
- songoku
- · Replies 26 ·
Grasshopper Jumps Between Two Cars Before Collision
- rado5
- · Replies 20 ·
What is a Conservative System in Classical Mechanics?
- fortaq
- · Replies 4 ·
MY First Post what force is exerted on a astronaut in space that ?
- graphicer89
- · Replies 3 ·
Logarithmic decrement for torsional pendulum with 13% amplitude after 100 cycles
- tone999
- · Replies 1 ·
Peter and Margeret skating: KE, momentum, force and power
- ride4life
- · Replies 2 ·
How Do Magnetic Fields Orient Around Parallel Conductors?
- 9giddjl
- · Replies 4 ·
Angle between a force and radius?
- TexasCow
- · Replies 11 ·
Conservative Forces and Friction
- MarineBio
- · Replies 2 ·
Gravitation multiple particle system
- Puchinita5
- · Replies 1 ·
Light intensity of a flashlight?
- superbnchic
- · Replies 9 ·
What is the Original Speed of Linked Objects in Two Dimensions?
- tiffanysnsd
- · Replies 15 ·
How high will a stone shot from a slingshot go?
- colachuu
- · Replies 7 ·
Solving for Minimum Angle for Home Run
- jazz20
- · Replies 1 ·
Charge Density (Relaxation Time)
- jeff1evesque
- · Replies 8 ·
What is the drag coefficient of the cue ball
- Paulbird20
- · Replies 8 ·
Nonconservative work and a slide
- pttest
- · Replies 2 ·
How long would it take to count all the atoms in
- phartnett
- · Replies 3 ·
Tension Equation Question - Algebra Related
- crono_
- · Replies 2 ·
Determining instantaneous velocity and average velocity using a graph.
- Crescent
- · Replies 2 ·
Does moving charge in an electric field count as Ohm's law?
- jsalazar
- · Replies 13 ·
A lot of questions about statics
- RoyalCat
- · Replies 15 ·
Electron deflection between parallel plates with 120 N/C field
- mvk1
- · Replies 11 ·
How does change in current induce electromotive force
- jeff1evesque
- · Replies 3 ·
Electric field from a line of charge
- midge
- · Replies 1 ·
Calculate Charge on Each Sphere: Force and Total Charge Given
- jmb07
- · Replies 5 ·
What is the tension in the rope problem?
- pttest
- · Replies 3 ·
Energy lost by speeding car while drinving on a soft surface
- emusheyev
- · Replies 3 ·
What is the tension in each part of the rope
- donotremember
- · Replies 6 ·
Tension in bow string when pulled with 30.0 lb force at 126° angle
- rock_star
- · Replies 2 ·
I don't get something about the speed wave equation
- AznBoi
- · Replies 10 ·
Checking Conversion Accuracy for Frequency and Inductance Calculations
- physics10189
- · Replies 4 ·
Determining Initial Speed of Electron in Head-On Collision
- Matt1234
- · Replies 5 ·
Solve Torque Confusion: Find D to Snap Cable in Fig. 12-35
- Puchinita5
- · Replies 3 ·
Point where electric field from two charges is zero
- Matt1234
- · Replies 7 ·
Plate - E - Plate (Reasoning Needed more than Answer)
- exitwound
- · Replies 11 ·
What is the effect of friction on the orbit of a satellite?
- bodensee9
- · Replies 11 ·
F = ma also equals to F = mg? F = Fa - Ff?
- Physlithium
- · Replies 8 ·
Time-harmonic functions (Complex Vectors)
- jeff1evesque
- · Replies 12 ·
Complex Conjugates: I'm Not Sure Why V^2?
- jeff1evesque
- · Replies 1 ·
Cannonball Question Solved - 200m Target Hit?
- juliany
- · Replies 2 ·
MCQ: Potentiometer: Balanced Length, Resistance of Cell E
- leena19
- · Replies 6 ·
What is the Effect of Dimpled Surfaces on Rolling Friction?
- Meggett
- · Replies 12 ·
Harmonic Function (time averages) II
- jeff1evesque
- · Replies 1 ·
Refrigerator power rating and heat absorption
- nrweis
- · Replies 4 ·
Train climbing 5 km track with 40 m rise: work-energy equation
- ln85
- · Replies 1 ·
Friction and tension force- mass
- Paulbird20
- · Replies 3 ·
What is the Contribution of Segments AB and CD to the Magnetic Field at Point O?
- peaceandlove
- · Replies 1 ·
The electric potential difference created by point charges.
- xkelleh
- · Replies 2 ·
Energy lost when reconnecting charged capacitors with opposite polarities
- wcelectric
- · Replies 7 ·
Getting an intuitive feel for pressure in psi and pascals
- madhuresh
- · Replies 6 ·
Optical Instruments I: Optical Element
- OsDaJu
- · Replies 3 ·
Stocke's law and terminal velocity
- leena19
- · Replies 17 ·