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.
Thermodynamics: Adiabatic Process and Changes in Volume and Pressure
  • joe215
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Finding the Cross Product of A and B: A Puzzling Answer?
  • -EquinoX-
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3
What Minimum Height Must the Sides of a Steel Boat Have to Float?
  • aa1515
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Torque direction using right hand rule
  • -EquinoX-
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Elastic Potential Energy of a Spring Between 2 Blocks
  • mac31905
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5
Temperature of Pluto's Atmosphere
  • viviolet
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Heat/First Law of Thermodynamics/Calorimetry - Have work done
  • maniacp08
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How Many Beers Does It Take to Reimburse Energy Expenditure?
  • nns91
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6
Static Equilibrium of a tree sapling
  • Bones
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2
Gravity in a uniform density sphere and a shel
  • musicfairy
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Acceleration of mass on a spring
  • futurept
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3
How to Find a Skateboarder's Speed Down an Inclined Ramp?
  • Vaalron
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Tyrolean Traverse/Static Equilibrium Problem
  • SMA83
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Torque and netwon's second law: True or false question
  • alpha372
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Thermodynamics involving rods and heat transfer with conduction
  • goodiegrady
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Time for a micro-wave to travel a distance
  • rebeccc
  • · Replies 11 ·
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Do Friction Forces Have Units?
  • AirHendrix
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6
Oscillation of a String: Amplitude, Speed & Node Distance
  • matt62010
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1
How Do Sinusoidal Waves Interfere to Form a Resultant Wave?
  • matt62010
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Electric field caused by a uniform linear charge
  • gotem3303
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1
Circular Motion and Friction on an amusement park ride
  • DMOC
  • · Replies 9 ·
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9
Collision, Bullet fired into block of wood
  • synergix
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7
Simple Harmonic Motion of a machine part problem
  • veronicak5678
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Elastic collision, frictionless surface
  • synergix
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5
Significant Figures: Do Instructors Require Them?
  • Elbobo
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Angular acceleration of one rotating object fixed to another rotating object
  • p21bass
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Answer Check: Displacement Currents and Capacitors
  • TFM
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Calculating Orbital Time of Sun with Average Radius of 2.5*1025 km
  • jawo3
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2
Minimum Radius of Space Habitat to Maintain <1/100g Variation
  • NateTheGreat
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Weight Density and Mass Density
  • GreenEyedGal3
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4
Astronaut traveling what effects would she feel?
  • goWlfpack
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5
Torque and equilibrium; concept problem
  • alpha372
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2
Relativity and observed length of a moving object
  • goWlfpack
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6
Kinetic Energy of tennis ball drop
  • lenbc2006
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3
What is the Time Read by a Moving Clock in Basic Relativity?
  • DukeLuke
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6
Answers to Physics Questions: Temperature, Range, Forces, Spillage, and Speed
  • lenbc2006
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Friction force on a rolling ball
  • jimbo71
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Capacitor Circuit (Capacitor as source)
  • mtbhrd
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Angular Speed of Rotating Disk: Omega Final & Initial
  • mburt3
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Partial Pressure question (should be easy to answer)
  • dlw902
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Rotation kinetic energy/linear velocity
  • jimbo71
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4
How can I solve these physics problems involving torque and rotational energy?
  • Max CR
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Impulse on ball involving angles
  • AdamNailor
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9
Is the answer for (3 + i) / (6 - i) correct?
  • elie_girl
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5
What are the velocities of the carts after a perfectly elastic collision?
  • southernbelle
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How Does River Current Affect Boat Speed and Crossing Time?
  • Inertialforce
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2
Mass momentum of inertia in lab, error analysis
  • Regel
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4
Calculating Work Output from Thermal Efficiency of Car Engine
  • WhyPrime89
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Gravitational Field problem Question
  • jessedevin
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4
How Does the Position on a Turntable Affect a Mass's Acceleration?
  • jimbo71
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What do photons carry information about?
  • cap.r
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What Is the Volume of a Gas Bubble Just Beneath the Surface of Mercury?
  • greyknight
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Rotation Problem/Total Kinetic Energy
  • mburt3
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What Is the Correct Value for k in the Latent Heat Equation?
  • jcpwn2004
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How Do You Calculate the Electric Field to Suspend a Proton?
  • EtherMD
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Angular Momentum: Rod on Rotating Disk
  • nastassja
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Physics Free Body Diagram Question
  • bengalkitties
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How Does Tension Vary in a Simple Pendulum?
  • bocobuff
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How Do You Calculate Displacement and Time of Flight When Sliding Off a Roof?
  • Inertialforce
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How Can We Optimize Our Water Balloon Launcher?
  • mcca408
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Is This Free Body Diagram of a Pendulum Correct?
  • -EquinoX-
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Billiard ball rolls with slipping to without slipping.
  • alphaJA
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Solving for Spring Compression: A 0.10 kg Wooden Block
  • BC2210
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Solve for Acceleration at Point B in a Rod on a Frictionless Surface"
  • saltine
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Kinetic Energy/Velocity Relationship
  • bmyer
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How would i find the coefficient of sliding friction
  • meredith
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Find work done by each of the forces.
  • wadesweatt
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What is the lowest frequency for a microphone interference maximum?
  • rsu
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Calculating Length, Radius & Frequency of Steel Guitar String
  • anubis01
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How Long Does It Take for the Planet to Complete One Rotation?
  • jromega3
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Rolling Without Slipping/Loop Problem
  • mburt3
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Fission Reaction Energy Calculation
  • s_stylie0728
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Energy and Circular Motion Problem
  • sinequanon
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Calculating Angle in Two-Slit Experiment with High-Speed Protons
  • nnof55
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Spring constant with given mass, find Work
  • BC2210
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How High is the Watermelon When Its Kinetic Energy is 4.61J?
  • soccerplaya09
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Analyzing Tension Forces with friction
  • Mindstein
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What is the resultant magnitude and direction of three perpendicular forces?
  • ghostanime2001
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Physics Home Work: Coefficient of Friction Requirement
  • #CW!!ZERO
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Harmonic motion whose damping is not related to velocity
  • fdsadsfa
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Why Can't Brass Rods Be Charged by Rubbing?
  • perjogab
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Photons per second hitting an aperture
  • SammC
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How Do You Calculate Angular Momentum for a Swinging Bob?
  • mburt3
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Moving two blocks connected by a spring
  • soupastupid
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Maximising sensitivity in a voltage divider
  • iainfs
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Capacitors Question Homework: Find Final Charge on 4.10 uF Capacitor
  • kidsmoker
  • · Replies 4 ·
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Conservation of energy of a rollercoaster car
  • nns91
  • · Replies 16 ·
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Find Magnitude with little information HELP
  • vballkatie22
  • · Replies 17 ·
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How Much Heat is Needed for a Steel Sphere to Pass Through an Aluminum Plate?
  • moeraeleizhaj
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Understanding Force Statements: Solving a Confusing Homework Problem
  • vballkatie22
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To what depth will the bullet penetrate the block in this case?
  • frosti
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Quick Question on Frequency (just a theoretical question)
  • sugarntwiligh
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4
How Much Force is Needed to Move a 50kg Crate?
  • vballkatie22
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What Is the Initial Momentum of the System?
  • Maiia
  • · Replies 3 ·
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Calculating Minimal Force for Constant Speed: Friction & Mass Relationship
  • liz777
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Is 1/2ln(a+4)+ln(b)-5ln(c) equal to ln(b/(c^5(a+4)^(1/2)))?
  • elie_girl
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3
1 Billard Ball Into Middle of 2 Others
  • agross
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1
Why Should the Power Output Be 47.7 Horsepowers?
  • davedave
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Finding Tensile Force in Pulley Problem
  • Ryino
  • · Replies 23 ·
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Calculating Impulse and Average Force in a Softball Pitching Problem
  • Maiia
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6