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.
Solving Squids' Impulses: Calc Speed to Escape Predator
  • mdewdude
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Radiation Pressure of 75 Watt Bulb at 8 cm
  • FrankJ777
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Find its moment of inertia about its axis of symmetry
  • bowma166
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6
Moment of Inertia: Mass, Radius, Formula
  • uno
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Induced voltages and step-up transformers
  • kitkat2950
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4
Can antimatter annihilation lift 81 million tons half a mile into the air?
  • starfox07
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River Current Speed: 2m/s or 4m/s?
  • Krystan
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Finding kinetic energy retained by an object after an elastic head-on collision
  • JuniorJumper
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How is kinetic energy related to momentum in a spring-mass system?
  • Shambles
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What is the Average Flow Rate in a Room with Circular Ducts?
  • jerryez
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Simple frictional forces and forces on boxes
  • metsjetsfan
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Billiard ball collision with change in direction
  • mariac
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What is the Centripetal Acceleration of a Car on a Circular Curve?
  • robvba
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What Are the Solutions to These 2D Motion Problems?
  • moaath
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2
Mechanical Energy: Solving for Work & Change in ME
  • sweedeljoseph
  • · Replies 6 ·
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6
Velocity of Ball on a Decline Ramp
  • maja_08
  • · Replies 3 ·
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3
Angular Position: t=0s, t=3.07s
  • Nyx018
  • · Replies 3 ·
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3
Work and Energy Block on incline problem
  • Thepoint
  • · Replies 5 ·
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5
Kinetic Energy of a flat uniform disk
  • themilkman
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1
Calculate EMF: 3.25 ohm, 440 mH, 3.00 A, 3.60 A/s
  • Shackleford
  • · Replies 2 ·
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Forces- two pulleys w. diff accelerations
  • Maiia
  • · Replies 1 ·
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Two Slit Interference Question =] Thanks
  • chipmunk951
  • · Replies 4 ·
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Air glider question and air resistance
  • BJducky
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2
Simple harmonic motion pendulum ( only given length and release angle)
  • Mr Person
  • · Replies 6 ·
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6
How Do You Calculate Vehicle Speeds After a Collision?
  • mandos
  • · Replies 1 ·
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Does anyone know the formula to find tension
  • tonya
  • · Replies 1 ·
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Circuit Analysis: Solving w/ Kirchoff's Laws for Potential Difference b/w a & b
  • Sheneron
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How Does Coulomb's Law Explain the Movement of a Cobweb?
  • Shilly
  • · Replies 1 ·
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1
Is It Easier to Use Mass Units for Calculating Kinetic Energy?
  • soupastupid
  • · Replies 1 ·
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1
Static Equilibrium Experiment: Calculations and Analysis | P182A-10.042
  • cali_sk8er205
  • · Replies 1 ·
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1
Solving Kinetic Energy of Block After Bullet Passes Through
  • DPatel304
  • · Replies 1 ·
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1
Skier on a sphere problem involving conservation of energy
  • BJducky
  • · Replies 1 ·
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1
Auxiallry Field in a Coaxial Cable
  • TFM
  • · Replies 90 ·
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What is the length of Joe's image in the mirror?
  • jcvince17
  • · Replies 2 ·
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Need help with simple mechanics problem
  • issacnewton
  • · Replies 1 ·
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Equivalent force-couple system (conceptual)
  • jaredmt
  • · Replies 1 ·
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Calculating Satellite Orbit Height Above Earth's Surface
  • livblue23
  • · Replies 1 ·
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Finding values of x where the infinite geometric series converge
  • meeklobraca
  • · Replies 4 ·
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4
Three Cylinders (rotational kinematics)
  • r34racer01
  • · Replies 3 ·
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What could be causing the discrepancy in Y0 when finding the placement vector?
  • devanlevin
  • · Replies 4 ·
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Maximum force exerted by floor?
  • kristibella
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EGG drop with elastic potential energy.
  • Asubach
  • · Replies 5 ·
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5
Free Fall Trajectory? Simple answer
  • MacFanBoy
  • · Replies 4 ·
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4
How Do You Calculate Force and Acceleration on an Inclined Plane?
  • swede5670
  • · Replies 5 ·
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Calculating Angular Speed of Playground Merry-Go-Round
  • Husker70
  • · Replies 1 ·
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Thought Experiment (Jumping of a building)
  • asc3nd
  • · Replies 1 ·
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How long does it take for the sun to move its own diameter?
  • shaka23h
  • · Replies 4 ·
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4
Need help with projectiles launched at an angle
  • austin1250
  • · Replies 3 ·
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3
Calculate Torque: Homework Solutions
  • halo9909
  • · Replies 1 ·
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Conservation of Energy equation help
  • MentalScrew
  • · Replies 3 ·
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3
Force to Lift 10 Bags of Soil (185N each)
  • halo9909
  • · Replies 1 ·
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A couple of projectile trajectory-related questions
  • FlyinDutchman
  • · Replies 1 ·
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Solving Watts Units: V/m From H/m, m/s, W/m^2
  • tony873004
  • · Replies 3 ·
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Find time of freefall based on little knowledge
  • Planefreak
  • · Replies 1 ·
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Where Should the Pivot Be Placed for Balance on a Seesaw?
  • uno
  • · Replies 4 ·
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Determining angle from initial velocity and distance
  • Planefreak
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How to Calculate Wind Pressure on a Wall?
  • jackamo321
  • · Replies 4 ·
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Solving Rotational Kinematics: Moment of Inertia & Energy
  • Awwnutz
  • · Replies 4 ·
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Will the Box Move on a Braking Truck? Mathematical Justification Required
  • tonya
  • · Replies 3 ·
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Induced Voltage Calculation for Stick in Magnetic Field B
  • Petkovsky
  • · Replies 3 ·
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Understanding Relative Angular Velocity and Acceleration in Rotating Bodies
  • da_vinci
  • · Replies 6 ·
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Experimental physics histogram problem
  • Ertosthnes
  • · Replies 1 ·
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Block Slides Down Giant Globe in Italy
  • soupastupid
  • · Replies 4 ·
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What is the Required Pressure Difference to Heat 2 Moles of Gas?
  • bap902
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Two forces act on a object with different magnitudes and direction
  • qtgrl120
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What is the Normal Force on Tires in a Banked Curve with Friction?
  • nns91
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What is the x-value at which the body's velocity is 5.0 m/s?
  • B-80
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How to Calculate Tension and Acceleration in a Frictionless Pulley System?
  • Miss1nik2
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Nonuniform circular motion toy train
  • Jennifer001
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What is the Final Momentum of Three Colliding Balls?
  • ScullyX51
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What are the forces acting on a ball falling through a liquid?
  • tachu101
  • · Replies 6 ·
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Finding acceleration of elevator using mass
  • mjolnir80
  • · Replies 4 ·
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How Does Frequency Variation Affect RMS Current in an AC Circuit?
  • alexmahone
  • · Replies 4 ·
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How Do You Calculate the Total Energy of a Geosynchronous Satellite?
  • ND3G
  • · Replies 7 ·
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Height of a Cliff (Only time Given)
  • PhysGoat
  • · Replies 2 ·
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2
Solving Two Worlds Spinning: Calculating Tension (T) in String
  • soupastupid
  • · Replies 1 ·
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Calculate Average Blood Speed with Volume Flow Rate | Physics Problem Help
  • diamond_dust
  • · Replies 1 ·
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How to find Density/ Radius of planetesimals
  • Cherrio
  • · Replies 7 ·
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Power problem - finding altitude change
  • apang42
  • · Replies 9 ·
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Two Oxford Admissions Questions, Pedulums and Aircraft
  • alex3
  • · Replies 2 ·
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Finding the Ratio of Electron to Proton Speed in Beta Decay
  • tater08
  • · Replies 3 ·
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Light scattering (rayleigh scattering)
  • spaghed87
  • · Replies 5 ·
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Kinetic Energy Dissipation in a Colliding System
  • tater08
  • · Replies 3 ·
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Jumping impulse physics homework
  • keemosabi
  • · Replies 4 ·
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4
Velocity Of An Object Accelerated By A Spring
  • fcv33
  • · Replies 1 ·
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How Do You Calculate Bullet Acceleration in a Rifle Barrel?
  • tjh855
  • · Replies 3 ·
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One force represented along an x-axis
  • blakester
  • · Replies 2 ·
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Bullet penetrating a block problem
  • mjolnir80
  • · Replies 4 ·
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Force of impact during collisions
  • smiling_bug44
  • · Replies 3 ·
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Elastic collison of 2 moving object
  • HelloMotto
  • · Replies 2 ·
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Currents in Parallel Wires for Magnetic Attraction
  • nckaytee
  • · Replies 17 ·
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Conservation of momentum and astronaut
  • ScullyX51
  • · Replies 2 ·
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Revolutions of and Electric Drill
  • uno
  • · Replies 2 ·
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Angular speed of earth in its orbit
  • smw1016
  • · Replies 2 ·
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Conceptual work/energy question
  • Inertialforce
  • · Replies 2 ·
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Equivalent capacitance in complex circuit
  • quietriot1006
  • · Replies 2 ·
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Different Notations of Direction
  • jwj11
  • · Replies 1 ·
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Master Newton's Laws with These Challenging Practice Problems
  • the whizz
  • · Replies 3 ·
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How Does Friction Affect the Acceleration of Stacked Blocks?
  • lax1113
  • · Replies 6 ·
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Coefficient of friction Problem
  • highc
  • · Replies 36 ·
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