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.
Theory of special relativity -clocks and objects
  • ally1h
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How Fast Does the Elevator Cable Perform Work?
  • needhelp1234
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How to Find the Tension in a Three-Pulley System?
  • Phan
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How Much Water Flows Through a 1cm Hole in a Minute?
  • alibaba2
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Inclined plane and elapsed time
  • Sassenav22
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Forces in Equilibrium-Tension Forces at Different Angles
  • 312213
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Why Is Achieving Orbit Considered Halfway to Anywhere?
  • dswatson
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How Much Power Does the Elevator Cable Exert in kW?
  • needhelp1234
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How to Calculate Average Force from Momentum Change in a Collision
  • Maiia
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3
Solving Questions on Throwing a Baseball to Hit a Target
  • Sassenav22
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A disk with a Spring around it
  • lebprince
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Short, Easy, Lenz's Law Question
  • Sheneron
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Block on incline with vertical force
  • robvba
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10
How Do Newton's Laws Apply to a System of Hanging Masses?
  • cartoonorange
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Stuck on ladder problem, know the solution but need an explanation
  • BifSlamkovich
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Calculating Tension in a Rope: Is Fnet=ma Correct?
  • rachelamaryah
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Calculating Vector Components at 45 Degrees
  • thehatchetmen
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What is the final velocity of the goalie after catching a hockey puck?
  • itsmarasilly
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Two objects colliding & sticking together, what is their final speed?
  • itsmarasilly
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1
How Do You Calculate the Coefficient of Kinetic Friction for a Moving Crate?
  • Mebmt
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Magnitude, Direction of Momentum, & Velocity
  • itsmarasilly
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Moment of Inertia: Mass Distribution & Coefficient
  • fk378
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How Much Work to Compress a Spring Further by 7cm?
  • aleferesco
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4
Pendulum in Simple Harmonic Motion
  • smile05
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3
How Does Friction Affect Spring Compression on an Inclined Plane?
  • nns91
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Simple harmonic motion and oscillation period
  • 05holtel
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Spinning Frame of Reference: Inertial or Non-Inertial?
  • alpha372
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What is the slope of a force vs. distance graph?
  • JJBladester
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2
Pistons, Pressure, Work, and Height
  • Phoenixtears
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2
Calculating Projectile Work and Force in a Compressed Helium Launcher
  • Woopy
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I am having trouble relating to impulse
  • harvellt
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Diffraction and interference patterns
  • nokia8650
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Understanding Polarisation of Light
  • nokia8650
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2
Solving Missile Motion Problems: Answers & Explanations
  • malay ko
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Capacitor Circuit: Solving for Charge & Voltage
  • noppawit
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3
An elastic collision in two dimensions
  • Woopy
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Friction between 2 masses and maximum acceleration
  • 12thString
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4
How Do You Calculate Torque in a Static Equilibrium Problem?
  • jaded18
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How Does Jet Engine Thrust Affect Train Kinetic Energy?
  • citypigeon
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Acceleration Question.Please Check My Answer
  • cbrowne
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4
Solving Angular Acceleration: Tips and Help for Inclined Planes and Formulas
  • tidus1117
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Angular Acceleration of a Model Rocket
  • x2008kwa
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Circular motion and gravitation
  • Inertialforce
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Please help me with this physics problem on static friction
  • redhawks
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Point charges in a line; electric field
  • etagg
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How Do You Calculate the Tangential Force on a Pole?
  • jumbogala
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Calculating angular speed out of tangential speed
  • catstevens
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Vertical acceleration of a rod rotating around a pivot
  • yankans
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9
Conceptual thermodynamics question
  • kuahji
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Energy required to expand V of cylinder
  • vertciel
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How to Calculate Horizontal Distance in a Ballistic Pendulum Experiment?
  • stanford1463
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Solving a Complex Rotational Dynamics Problem
  • x2008kwa
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Does the Water Freeze When a Cooled Aluminum Cylinder is Placed in It?
  • mtu8
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Maximum horizontal range-shot putting
  • bobbyc15
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How Much More Infrared Does a Sick Individual Emit Compared to a Healthy One?
  • MSmith19
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Standing Waves Formula Question
  • jessedevin
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Recoil Velocity: Solving Numerical Problems in Momentum and Energy
  • Woopy
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Balistic Pendulum Equation Solution
  • Woopy
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Energy Conserved in momentum problem
  • Woopy
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8
Effects of Increasing Temperature on Ideal Gas
  • jimbo71
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Where is the Greatest Pressure in Fluid Dynamics?
  • jimbo71
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Pressure and force in 3 different containers
  • hellblazer970
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Calculating Max Depth of Apparatus on Mars
  • jimbo71
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4
How Do You Calculate the Coefficient of Friction?
  • liz777
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How is the cylinder's motion affected by changing the tension of the string?
  • soupastupid
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Simple Newtonian Mechanics question (infamous box and ramp question)
  • mjdiaz89
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Calculating Angular Momentum with Constant Torque: A Particle in Motion
  • lebprince
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Solving the Tension in Three Object Pulley System
  • bluejay1
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Bungee Jumper/Oscillatory Motion
  • jromega3
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Sound, balloons, light, & pressure questions
  • alliecr
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Electromagnetic Waves Question, regarding Magnetic Field and Electric Field
  • TFM
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How Much Energy Was Lost to Friction When Braking Downhill?
  • davedave
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What is the net force on the roof
  • robvba
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What is the Time and Distance for a Hockey Player to Catch Up with an Opponent?
  • cbrowne
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How Accurate Are These Sig Fig Calculations and Unit Conversions?
  • cbrowne
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Find the depth of a tube submerged in water that is half filled with air
  • KEØM
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Calculating Initial Speed and Velocity of Thrown Keys
  • cbrowne
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Simple temperature ratio question
  • bpaterni
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Loss of mechanical energy in a plastic collision
  • fluidistic
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Cooking Veggies: Boiling or Steaming - Which is Faster?
  • dsptl
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Finding distance that a pad is compressed after being dropped
  • Greywolfe1982
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How Do You Calculate the Physics of a Race Car on a Banked Curve?
  • Jayker
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Weight & Buoyancy: Will the Measured Weight Be Less?
  • krayziemuzick
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Solving for Period of SHM with Pendulum Hitting Peg
  • keasterling
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What is the acceleration of the center of mass of the cylinder?
  • cloudzer0
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How Fast Does Roller A Rotate?
  • tom23
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Solving a Puzzling Motor-Wheel Problem
  • saltine
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Maxwell's Equations: Help to truly understand them
  • TFM
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Determine the wavelength of the wave
  • keemosabi
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Solving for Depth in Boyle's Law: Barometer Tube Submerged in Water
  • aamphys
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What is the Optimal Angle for Pulling a Sled to Minimize Force?
  • slugglee
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Rods & Springs Oscillations: Frequency Calculation
  • thejinx0r
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Mass-spring system with friction
  • GoSS190
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Work done by friction on an incline plane
  • GoSS190
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Giraffe Blood Pressure: Calculating Gauge Pressure at the Brain
  • chandangang
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Finding mass of a central body: centripetal forces and orbiting bodies
  • Omnistegan
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Thermodynamic problem, mastering physics
  • Shayna
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Bernoulli's fluid flow in a tube [desperate]
  • erinec
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Transverse Waves- Verticle Rope
  • bollocks748
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Ideal gas equation and boyle's law
  • moeraeleizhaj
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