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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What is the atmospheric pressure at the planet's surface?
- JWHooper
- · Replies 2 ·
How Does Magnetic Force Affect the Direction of a Wire in a Magnetic Field?
- arod2812
- · Replies 1 ·
Vector addition graphically with multiple angles
- ronislegend
- · Replies 2 ·
Two-loop circuit using Kirchoff's Laws problem
- ayeelkaye
- · Replies 1 ·
Solving Kepler's Laws: Calculating a, b, and f in Mkm
- goldfronts1
- · Replies 2 ·
Which Brick Lands with the Highest Speed and Other Physics Enigmas?
- lollol
- · Replies 3 ·
Solving Tension in 2 Wires Attached to 360 g Sphere
- mofazfaz
- · Replies 5 ·
Change in Electric Potential from the Surface of a Conducting Sphere to Infinity
- jhfrey89
- · Replies 4 ·
Freefall from a great height, changing g
- bitrex
- · Replies 2 ·
Circular Motion and Tension: Solving for Wire Tension in a Rotating System
- tarheelfan286
- · Replies 3 ·
Mark's Struggle to Solve Dynamic Systems Qn
- series111
- · Replies 19 ·
Maximum oscillation points from two 300Hz out-of-phase sources 5m apart
- LandOfStandar
- · Replies 7 ·
What Is the Laboratory Frame Energy of a Proton?
- cartonn30gel
- · Replies 1 ·
What will happen to the world without friction?
- ultimasayan
- · Replies 2 ·
Compound pulley tension question
- sailsinthesun
- · Replies 7 ·
Find the rotational inertia of a sphere suspended from the ceiling
- grouchy
- · Replies 15 ·
Calculating Trajectory of a Plane Flying at 100m/s
- qubert
- · Replies 6 ·
Gravitational force between 2 protons
- jace
- · Replies 1 ·
Plotting Total Energy vs Time for Damped System (MATLAB)
- krnhseya
- · Replies 8 ·
How to Calculate the Work Done When Pushing a Ball Underwater?
- Drektjal
- · Replies 2 ·
Kinetic Energy of 7.0 kg Bowling Ball Falling from 2.0 m High Shelf
- 21ducks
- · Replies 11 ·
Tension in string between blocks with applied forces
- A_lilah
- · Replies 1 ·
Why a balloon sticks to the wall
- jace
- · Replies 1 ·
Solve Kirchoff's Laws: 8V, 4V, 110Ω, 40Ω, 50Ω
- shigg927
- · Replies 1 ·
Current density of protons in solar wind at Earth's orbit
- flash525
- · Replies 1 ·
Who wants to grade my test? (physics 1, simple for physics buffs)
- Nima23
- · Replies 4 ·
Upward force on parachute with person descending at 2.8 m/s²
- A_lilah
- · Replies 2 ·
What Is the Second Force Acting on a Mass in the x-y Plane?
- dflutedevil
- · Replies 2 ·
Finding mass of paperclip using Millikans theory
- Physics_MHS
- · Replies 1 ·
Guitar String Vibrations: Freq 437 Hz, Distance 235m
- petern
- · Replies 4 ·
How close will comet come to earth
- scatterbrain8
- · Replies 1 ·
What is the speed of the block when the spring is compressed by 10 cm?
- grouchy
- · Replies 9 ·
Tension pulls the bucket upward
- 21ducks
- · Replies 4 ·
The How Long Does It Take for the Sun's Light to Reach Earth?
- zachcumer
- · Replies 8 ·
Electric flux through top face of a cube with nonuniform field
- dgoudie
- · Replies 20 ·
What are the tensions in the strings of a 3.60 kg object in circular motion?
- zcabral
- · Replies 1 ·
Calculating Acceleration of Ions in 2D Motion for Cancer Tumor Treatment
- StephenDoty
- · Replies 4 ·
Electric field at center of square given corner potentials
- katie_lynn16
- · Replies 1 ·
What is the speed of a block dropped from 0.41m with a pulley involved?
- MellowOne
- · Replies 1 ·
How Do Newton's Laws Apply to a Lemon Half on a Frictionless Surface?
- iamkristing
- · Replies 3 ·
Magnitude of Electric Field problem
- jlone
- · Replies 2 ·
Kinetic Energy of Charged Particle
- soccerj17
- · Replies 1 ·
Why do all colors combine to make white?
- zachcumer
- · Replies 3 ·
Finding coil diameter for 1.66 mT field from 1.1 m copper wire
- BuBbLeS01
- · Replies 1 ·
Calculating the Speed of a Ball Shot from a Spring Gun
- cstout
- · Replies 5 ·
Block A with hanging weight and angled string to wall
- amm617
- · Replies 1 ·
Refrigerator rated 80W at 250V: what happens when voltage drops to 50V?
- ritwik06
- · Replies 1 ·
Solving a Copper Metal Heat Exchange Problem: Seeking Advice
- kirste
- · Replies 3 ·
Measuring Human Reaction Time with a Ruler
- Dgolverk
- · Replies 1 ·
How Does Changing Arm Position Affect Angular Velocity and Work Done?
- PeterPoPS
- · Replies 1 ·
Shape of field line in an electric dipole
- darkrystal
- · Replies 2 ·
Electric Potential within coaxial cylinder
- electrifice
- · Replies 2 ·
How Much Weight Can Block A Support Before Sliding?
- amm617
- · Replies 1 ·
What Is the Magnitude of the Average Acceleration of a Ball Bouncing Off a Wall?
- chocolatelover
- · Replies 9 ·
What Determines a Roller Coaster Car's Speed at the Top of a Loop?
- StephenDoty
- · Replies 1 ·
How Are Pendulums Used in Safety Testing for Land Rover Cars?
- Ahem
- · Replies 4 ·
Model car speed from work-energy theorem with varying force
- clope023
- · Replies 16 ·
How to Determine Maximum Spring Stretch for a Box on an Inclined Plane?
- just.karl
- · Replies 2 ·
How High and Fast Does a Grasshopper Jump at a 44° Angle?
- Raul-7
- · Replies 1 ·
Doppler effect: car horn, reflected sound, and beat frequency
- ron_jay
- · Replies 4 ·
Change in Water Level after throwing over anchor
- TFM
- · Replies 29 ·
Charged ball suspended at 19° by horizontal electric force
- grothem
- · Replies 3 ·
Net Force Exerted on 4.0*10-9 C Charge at Origin
- undrcvrbro
- · Replies 3 ·
Special relativity - collision of a photon and an electron
- shwouchk
- · Replies 6 ·
Circular Motion Experiment: Velocity^2 vs. Radius Analysis
- smashingtime
- · Replies 1 ·
Electric potential and kinetic energy
- tony873004
- · Replies 1 ·
Periodic motion, electric charge
- tony873004
- · Replies 1 ·
Which wave reaches point B first?
- ~christina~
- · Replies 3 ·
How Do You Calculate the Coefficient of Kinetic Friction on a Slide?
- just.karl
- · Replies 5 ·
A simple but interesting problem
- dr_d_is_cool
- · Replies 1 ·
Solving Motion of a Ball Fired by Compressed Air
- grothem
- · Replies 1 ·
Skateboarder leaving a 1.0-m ramp at 30°: how far away does he land?
- StephenDoty
- · Replies 19 ·
How Does Angular Velocity Vary from Top to Bottom of a Tower on the Equator?
- StephenDoty
- · Replies 2 ·
Simple angle relationship question
- jx44
- · Replies 3 ·
Why is the negative charge excluded from the potential change integral?
- skt1BOXER
- · Replies 1 ·
How Much Force is Needed to Move a Block on a Wall?
- james2mart
- · Replies 1 ·
Determining Coefficient of Kinetic Friction on an Inclined Slide
- just.karl
- · Replies 11 ·
Energy dissipated in copper loop as magnetic field increases
- tigerguy
- · Replies 6 ·
Line Integration: Electric Field, Potential Energy & Displacement Vector
- Gear300
- · Replies 2 ·
Angular Velocity: Calculating Revolutions in 4 Seconds
- StephenDoty
- · Replies 1 ·
Potential Energy and maximum velocity
- JSapit
- · Replies 4 ·
How Does a Window Washer Adjust Force to Ascend at a Constant Speed?
- rwx1606
- · Replies 7 ·
Addition and Subtraction of Vectors
- MuchJokes
- · Replies 7 ·
How to Calculate Power Requirements for a Truck at Different Speeds
- clope023
- · Replies 21 ·
How Do You Calculate the Volume and Weight of Air in a Building?
- chocolatelover
- · Replies 3 ·
3 vectors using south, northeast, and west
- chocolatelover
- · Replies 6 ·
How Many Molecules Exist in a Cubic Centimeter at 10^-15 atm and 20°C?
- bse
- · Replies 1 ·
What is the principal difference between light and X-rays?
- zachcumer
- · Replies 5 ·
Multiplying rational expressions with cancellation
- mike_302
- · Replies 2 ·
Canoeist paddling perpendicular to current: which calculation is correct?
- r.meghdies
- · Replies 6 ·
What Went Wrong in My Incline Friction Problem?
- houseguest
- · Replies 3 ·
Ball on ramp and Merry Go Round problem
- john8910
- · Replies 1 ·
Finding the Center of Mass of a Human Figure
- yoshuayisrael
- · Replies 1 ·
Converting Newton's Law of Cooling from Heat Loss to Temperature Decay
- Grapz
- · Replies 2 ·
Solving the Falling Ball Problem: t2=2t1?
- princesspriya
- · Replies 4 ·
How Does Gravity Affect Equations in Vertical SHM Problems?
- brendan3eb
- · Replies 3 ·
Frictional forces acting on log Application of Newtons Laws
- destro47
- · Replies 3 ·
What is the force needed to stretch a horizontal spring by 7.15 cm?
- destro47
- · Replies 2 ·
Proportional Masses Newtons Laws
- destro47
- · Replies 1 ·
Calculating Tensions and Acceleration in Frictionless Pulley System
- Lamoid
- · Replies 2 ·