Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
How Do You Calculate Wire Resistivity in Physics Homework?
  • thunderstorm
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Momentum Problem and final velocities
  • Foon
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What Physics Principles Explain the Safe Drop of an Egg from a 5-Story Building?
  • gr8one626
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How Do Cepheid Variable Stars Illuminate Distance Calculations in Astronomy?
  • Morpheus
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Desperately with physics project (building a motorized drawbridge)
  • LtSparky
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Creating a Contraption to Protect a Raw Egg from Impact
  • ccb056
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Rotating 1/x to make a hyperbola?
  • Khan
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Mechanical Reversibility vs Thermodynamical Irreversibility
  • Batman
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How Does Hooke's Law Affect Wave Propagation in Stretched Rubber Bands?
  • DivGradCurl
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Answer AP Physics Q: Moment of Inertia, Angular Accel, Tension, Torque, & RKE
  • pezzang
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Solve Motion and Friction Problem: Estimate Car Speed When Brakes Applied
  • latte
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Electrostatic Force Question: Am I Right?
  • Inquiring_Mike
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Waves - I just need to confirm an idea
  • DivGradCurl
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How to Solve Momentum Problems in Collisions
  • SEG9585
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What is the mass of the string?
  • timtng
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Pendulum differential equation question
  • okalakacheekee
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Truss - how are forced transfered
  • omgitsroy326
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Calculating the Mass of the Galactic Center with Kepler's Third Law
  • Morpheus
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What is the total momentum of a high school discus thrower's throw?
  • leftdalltheway
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How many g of ice melt before thermal equilibrium is attained
  • cathliccat
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How Is the Formula for Centripetal Acceleration Derived?
  • Lindsey
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Please help with Motion Problem, looks easy but is confusing (to me)
  • accesskb
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Help! Grade 12 Physics Puzzler: Can You Solve It?
  • paigegail
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Calculating Orbital Periods in Saturn's Rings
  • solo
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Protecting Endangered Species & Viruses: Research Topics
  • zeronem
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Air flow speed at top of airplane wing
  • kashmirekat
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Centripetal acceleration of a car in a loop
  • star56
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Question 1st law of Thermodynamics
  • kuwait
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Geometry: Equilateral Tri. and Circumcirles
  • wubie
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How Do You Calculate the Center of Gravity for a Carpenter's Square?
  • Nanabit
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How Does Rotational Kinetic Energy Affect the Range of a Tennis Ball?
  • Nb
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How to Calculate Tension and Acceleration in a System of Connected Masses?
  • RickT
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What is the decrease in kinetic energy during the collision?
  • mustang
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Tractor Towing a Trailer: What Force is Exerted on the Incline?
  • izmeh
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Relative Motion of a moving sidewalk
  • aragornbird
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Formula for the harmonic oscillator is f"(x)+W^2 * X(t)=0
  • Chiara
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Calculating Initial Speed of Bullet After Collision with Spring-Mounted Block
  • PiRsq
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Manipulating Data to Create a Linear Graph for Circular Motion Experiment
  • tonogai40
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Fluid Mechanics and Styrofoam slab
  • vmind
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Measuring Gravity: Finding Accurate Results for Your City
  • Meab5
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How Does Mass and String Length Affect Rotational Dynamics?
  • kamoey
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Fluid Mechanics of helium-filled balloon
  • vmind
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What Are the Equations to Solve a Ladder's Minimum Angle Problem with Friction?
  • wolfgarre
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Doppler effect ball throw question
  • andytran
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Solve Equilibrium Problem: Biceps Force at Elbow
  • timtng
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Geometry: What Theorem Is This?
  • wubie
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Applying to MIT: What GPA is Necessary?
  • The_oMeGa
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Midterm HELP - On Kinematics and Dynamics
  • coglon
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What Happens When Two Equal Mass Carts Collide Head-On at the Same Velocity?
  • game
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Voltmeter Measurement: Peak vs RMS?
  • discoverer02
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Solving a Seismic Mystery: Calculating Epicenter Distance
  • tristan_fc
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Formula for atmostpheric pressure
  • mattmns
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Spring loaded collisionneed some guidance
  • Juntao
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What Are the Next Steps in Solving This Physics Problem?
  • paigegail
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Looking for an Experiment about water
  • mmcoelho
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HELP Projectile motion and Force puzzler
  • paigegail
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How Can I Solve This 2 Part String Problem in Physics?
  • Aaron8153
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How Does Windmill Power Depend on Blade Diameter and Wind Speed?
  • tandoorichicken
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How Does Friction Affect the Speed of a Toy Cannon Ball?
  • wachaif
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Non-harmonic oscillatory motion
  • Nitrus
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What is the current I in a wire that repels an electron at a certain distance?
  • happy thoughts
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What Forces Have You Experienced That Follow the Inverse Square Law?
  • Inquiring_Mike
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A jet transport has a weight of 2.97 x 106 N and is at rest on the runway
  • moonlit
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L2 transformation reduces to the L1 transformation
  • Pyrokenesis
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How Is the Formula for Kinetic Energy Derived?
  • Haftred
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Solving Recoiling Problem: Mass, Angle, and Velocity Calculations
  • rdn98
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Tension in a Rope: Understanding Acceleration in Lifting a Bucket of Water
  • izmeh
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A couple problems with angular momentum
  • Nanabit
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Pig on a slide Friction Problem
  • Kharmon7814
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Why Does a Pulley System Show Different Tensions for Different Masses?
  • Psi
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DC Motor Problem - Magnetic Field Calculation
  • Shahil
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Help Struggling Student w/ Glancing Collisions Qs
  • ScoutFCM
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How do I calculate the distance of a particle in an electric field at t=2.0s?
  • zath
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Solve Checkers Problem: 8x8 Board, 7 Moves, Many Paths
  • Chaotic Boredom
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Rate of Heat Output to Low-Temp Res per Cycle: 450J
  • fish
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What is the tension in the cable
  • physicszman
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How Can You Calculate the Acceleration Due to Gravity?
  • mattmate
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How Do You Solve Newton's Laws Problems for a Sailboat and a Pickup Truck?
  • Alethia
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Ferris Wheel Weight Calculation
  • Kharmon7814
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What Determines the Maximum Speed of a Ball Fired from a Toy Cannon?
  • wachaif
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Calculating Gravitational Potential Energy in a Swinging Child
  • floydzeppelinfan
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Tension and Friction problem, i
  • zm87
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Validation of a Work/Energy Problem
  • Mattchu
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Is String Theory the Future of Physics?
  • daodude1987
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Why Does the Moon Take 6 Hours to Pass Through the Earth's Penumbra?
  • Math Is Hard
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How great of a force is required?
  • ACLerok
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Calculating Angle of Fuzzy Dice with Acceleration
  • Kharmon7814
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Applying the Product Rule to a Non-Differentiable Function
  • StephenPrivitera
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Equilibrium Problem: Equal Stresses/Strains in A & B
  • broegger
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Work on 1.5x10^3 N Crate: Force, Displacement & Friction
  • Alethia
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Calculating Time for Rotation Problem with Coefficient of Friction μ
  • timtng
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Equilibrium Problems Kc = .090: Calculating Concentration
  • marioland
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Is Any Dynamical Variable's Infinitesimal Transformation Canonical?
  • Lotophage
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Bowling Ball Angular momentum problems
  • Nanabit
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Solve Tension Problem: mgsinθ Answer
  • prettybabylily
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Amplitude and Velocity Relationship in Violin Playing
  • barcat
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Conservation of Angular Momentum Question
  • timtng
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Question For Physics Take Home Quiz that I just can't get
  • chuckles_345
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Solving Exploding Spring: Find Car Speeds
  • Juntao
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Calculating Force Needed to Support an Object with Hydraulic Press
  • ShakeWell
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