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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Parallel axis theorem and moment of inertia
- Edwardo_Elric
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Ayren purchased a 1000W (120V) hair dryer in the USA,
- Xaspire88
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Photoelectric Effect, Threshold Frequency etc.
- Andresx90
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Two uniformly charge spheres are firmly fastened
- Xaspire88
- · Replies 3 ·
How Do You Solve for Variables in Vector Addition Equations?
- DoktorD
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Find 3rd Component of Y Velocity for Projectile Question
- jbutl3r25
- · Replies 3 ·
Change in gravitational potential energy when a rope falls from ceiling to floor
- Edwardo_Elric
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Force applied to a ball thrown 7.23 m high
- fubag
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What is the moment of inertia for small blocks clamped to a light rod?
- Edwardo_Elric
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What is the asteroid's acceleration in unit-vector notation?
- tjcreamer9
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Why Do My Physics Calculations Keep Giving Incorrect Results?
- Lorelyn
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Uniform Acceleration/Projectile Motion
- barnaby
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Elastic collision speed and time problem
- fizzzzzzzzzzzy
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How Do San Francisco's Cable Cars Work Mechanically?
- splac6996
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Two 1.0-g beads are charged .?
- mikebc
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Conservation of Energy and Centripital Acceleration
- Sirkus
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Kirchhoff's second law having exams soon,
- Kushal
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Gauss' Law (Why the opposite sign?)
- PFStudent
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Space Station and motion sickness
- eanderson
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Where is the center of mass and black hole in this space system?
- Ertosthnes
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What force is needed to keep the box at rest on an inclined plane?
- map7s
- · Replies 9 ·
Static Friction - starting motion
- surfinusa555
- · Replies 3 ·
Free Body Diagram and tension force
- random101
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What Is the Earth's Acceleration Toward a Falling Student?
- map7s
- · Replies 4 ·
Integral problem on electric potential
- venom_h
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Calculating Drag Forces on Arcs for Engineering Project
- SkydiverChris
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What is the force exerted by the shuttle-rocket engines during launch?
- map7s
- · Replies 3 ·
Coefficient of kinetic friction of force sensor
- map7s
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How Far Does a Bullet Travel When a Gun Recoils 2mm?
- kateman
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Solving Inclined Plane w/ Frictionless Box: Find Accel & Force
- map7s
- · Replies 5 ·
Linear impulse and linear momentum
- krnhseya
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What is the tangential speed of the ball?
- Smessy
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Dynamics Questions: Spring Scale and Fire Helicopter
- rabedes
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How Far Does a Snowball Travel After Rolling Off a Roof?
- ptpatil
- · Replies 7 ·
Plane diving at 30° releases radar decoy - height and time in air
- Sympathy
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Electric potential calculation
- indigojoker
- · Replies 12 ·
Uniform angular acceleration - degrees per second?
- BlueSkyy
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Velocity of a mass being pulled across a level surface
- ttk3
- · Replies 1 ·
Tension in cord holding bundle in accelerating elevator
- pinkpanda02
- · Replies 4 ·
Find speed and acceleration of truck
- 012435
- · Replies 8 ·
Work Done to Stop 1590 kg Car from 82 km/hr
- chaotixmonjuish
- · Replies 8 ·
How Does Launch Angle Affect Slingshot Range and Velocity?
- physics_wannabe
- · Replies 3 ·
Rotational inertia of particle system
- snoggerT
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Net Force on a 850 kg Car Moving Right at 1.44 m/s
- willingtolearn
- · Replies 3 ·
Work of a child going down a slide
- delecticious
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How Does Friction Affect the Distance a Block Slides on an Elevated Track?
- delecticious
- · Replies 1 ·
Solving Unknowns for 10 N Force and 3.0 kg Box
- xCanx
- · Replies 1 ·
Testing Ohm's law with everyday items instead of meters
- breeniu123
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How Fast Does a Released Mass Travel After Being Stretched by Springs?
- kdm06
- · Replies 3 ·
Solving for Water Flow Distance Under Faucet
- momogiri
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Hocky puck vel/displacement/acc
- DarkTangent
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Robot on track with time-dependent force F(t)
- johnsonandrew
- · Replies 5 ·
Nuclear Reactions and Symbol Notation
- leah0084
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Finding coefficient of kinetic friction from braking distance
- imadagron89
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1998 Electricity FR Answers Needed
- fourteen_two
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Find the ratio of the frequency of the damped oscillator
- kreil
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Toy car motion: distance, displacement, speed and velocity
- cherryrocket
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AP Physics 2-D trajectory problem
- DyslexicHobo
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What Tension Must Ellen Maintain to Steady the Piano Descent?
- klm
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Work and frictional force on a Sliding Box
- danni7070
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How Far Did Big Bertha's Shell Hit During WWI?
- jbutl3r25
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Pool depth from refraction at 18 degrees viewing angle
- Huskies213
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Questions about x and y components of its change in momentum
- witeruna
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Constructing a Standing Wave Interference Pattern
- nblu
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Calculating Wind Speed for City A to City B Trip
- fubag
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Normal force on a pilot at the bottom of a dive loop
- eanderson
- · Replies 11 ·
How Does Projectile Angle Affect Range and Distance?
- SharkFin39
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Verify my calculation, bending moment torque
- WhiteHawk
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Charge on a bead given the Electric Potential
- julianne
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Shell exploding at apex with two fragments landing at different points
- Niles
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Distinguishing between different waves.
- nblu
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Lux Lumens and Watts per square meter
- Deleted member 74205
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Gravitationtrouble setting up equation
- Saladsamurai
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How Do I Calculate Currents in a Circuit with Different Resistances?
- Chantry09
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How Do I Derive the Equation for Theta in a Tension Problem?
- narsasistickx
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Magnitude of torque on a current loop
- ovoleg
- · Replies 3 ·
Water height in bucket with bottom hole using Bernoulli's equation
- momogiri
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Freefall, is the answer really 20 ?
- EvilBunny
- · Replies 3 ·
How Do You Calculate the Center of Mass in a Three-Body Celestial System?
- Ertosthnes
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What is the Radius of a Satellite's Circular Orbit Around Earth?
- BuBbLeS01
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Finding Average Speed and Velocity for a Round Trip
- jedjj
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Impulse and force from water stream hitting a vertical window
- kateman
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A Satellite in Sun-Synchronous Orbit
- ColdFusion85
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Ball being thrown against a wall
- turnip
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Hydraulic lift force and friction on a pipe plug in water
- ascll
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Force needed for 3kg block to slide down 40° incline at constant velocity
- graten2go
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Car Radial and Tangential Acceleration
- JeYo
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Max Velocity for Banked Road Problem
- jrmed13
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Why Is Calculating Tension in a Frictionless Pulley System Confusing?
- johnsonandrew
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Solving Kinematic Problem: Object Thrown From 50m High Building
- EvilBunny
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Acceleration of Book on Incline: Forces & Friction Analysis
- Vii
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Calculating Normal Force Acting on Car at Point B
- BuBbLeS01
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Work done by braking force without knowing acceleration
- sheri1987
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How Much Force Can Be Applied Before a Penguin Slides Off a Sled?
- ace214
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Force Analysis of a Pulley System with Inclined Plane and Hanging Masses
- B-80
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Crossing a River: Boat Direction and Time Calculations
- nealh149
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Power of Energy Transfer: Solving a 3D Vector Problem
- eraemia
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What percentage of the gas propellant in the completely filled propuls
- thatgirlyouknow
- · Replies 4 ·
Incline Plane / Friction Problem
- Destrio
- · Replies 6 ·