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.
Work-Kinetic Energy Theorem problem
  • anne921
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Solving a Physics Problem with Friction: Directions of Forces and Torques
  • sapz
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How Many Trucks Can US Oil Production Fuel in a Year?
  • cytochrome
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How to find the specific volume?
  • xCuzIcanx
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7
Atwood's Machine with one side holding a variable mass
  • coffeebird
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A Cylinder Rolling Down a Vertical Wall
  • Puky
  • · Replies 10 ·
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10
Mason-Weaver equation and time dependend solutions
  • Rosengrip
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1
Idealized Fluid: Pressure & Force Tangential to Surface
  • Von Neumann
  • · Replies 8 ·
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8
Calculating the moment of inertia of a cylinder
  • sapz
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2
Multiplying a Vector Product by Another Vector
  • student34
  • · Replies 15 ·
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15
Calculating G-Forces in a Banked Turn on a Roller Coaster
  • ntweisen
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2
Solving Final Temp of Ice & Water Mixture
  • Arooj
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6
How Do You Determine the Direction of a Magnetic Field in Wire Configurations?
  • e.pramudita
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Parallel Plate Capacitor having equal charges on plates
  • Tanya Sharma
  • · Replies 8 ·
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8
Scaling factor of Energy in a capacitor with change in charge
  • mrcotton
  • · Replies 2 ·
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2
Solve Physics Essay on Wave Power Plants with IB Course
  • Techlogic
  • · Replies 1 ·
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1
Making a DC motor speed question
  • 33639
  • · Replies 2 ·
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2
Need help for my question regarding circuit
  • mremadahmed
  • · Replies 8 ·
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8
Calculating the Required Charge for Gravitational Force
  • dfetnum
  • · Replies 4 ·
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4
Problem about Force, Work, and Energy
  • mrcat100
  • · Replies 3 ·
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3
Calculating Net Force on a Cyclist: Newton's Law Q Explained
  • pencilcase
  • · Replies 7 ·
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7
Two Rolling Objects Racing Down a Hill?
  • dwangus
  • · Replies 3 ·
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3
Calculating Error in Multiple Independent Variables
  • IZlo0110
  • · Replies 7 ·
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7
Can a Cannonball's Height Exceed Its Range?
  • poseidon007
  • · Replies 4 ·
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4
Find the maximum tension allowed.
  • SAUMYA B
  • · Replies 2 ·
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2
Switching inertial reference frames equations
  • Allie182
  • · Replies 1 ·
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1
Action and reaction pair for buoyant force.
  • kennykwong
  • · Replies 4 ·
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4
Tennis Ball Launcher Calcuations
  • Redfire66
  • · Replies 10 ·
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10
Why does it matter whether or not an ammeter has zero resistance?
  • question dude
  • · Replies 10 ·
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10
Particle in 1D Box: Relationship to Probability & Energy
  • Ayham
  • · Replies 6 ·
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6
Why the total tension is not zero?
  • Aruna Kiran
  • · Replies 6 ·
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6
Maximum value of F - SIN Waterloo Contest
  • Uns7able
  • · Replies 1 ·
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1
Wave: amplitude, frequency, wavelength
  • ahchew1413
  • · Replies 4 ·
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4
Torque (of a couple) and centre of gravity MCQ
  • Originaltitle
  • · Replies 2 ·
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2
Find the time interval between the above two events.
  • 7even
  • · Replies 11 ·
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11
Derive the density of an ideal gas as a function of temperature?
  • Outrageous
  • · Replies 6 ·
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6
What is the value of r given the change in electric potential?
  • mrcotton
  • · Replies 4 ·
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4
Complex operations, bra-ket notation, confusion
  • demoncore
  • · Replies 1 ·
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1
What Is Gaetan Boucher's Total Acceleration at 1/4 Lap?
  • Lolagoeslala
  • · Replies 35 ·
2
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SIN Contest Water Tank in a Moving Vehicle Question
  • daga2222
  • · Replies 10 ·
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10
Estimate the number of electrons flowing in a semiconductor pn junction
  • nishantve1
  • · Replies 1 ·
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Newtons laws clarification question
  • physics2000
  • · Replies 2 ·
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What Is the Tension in the Horizontal Segment Above the Attached Object?
  • ML1
  • · Replies 6 ·
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Calculate Ratio of Masses A & B After Collision
  • Gloyn
  • · Replies 10 ·
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10
Voltage B to D in a simple Circuit
  • Justkiller91
  • · Replies 9 ·
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9
Water and mercury volume change with temperature
  • spaghetti3451
  • · Replies 3 ·
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3
Static Equilibrium with buoyant force. High difficulty.
  • physninj
  • · Replies 6 ·
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6
I need to find the function of f with given data
  • mimi.janson
  • · Replies 15 ·
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15
Solving Static Equilibrium: Force at Support & Left End
  • ehabmozart
  • · Replies 3 ·
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3
Unknown angle between two vectors
  • student34
  • · Replies 2 ·
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2
Calculate the Ratio of Ib/Ia in an Electrical Circuit
  • SuperHero
  • · Replies 8 ·
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Problem related to the vector potential of B
  • nuclear_dog
  • · Replies 6 ·
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6
Derivations of KE=1/2mv^2 and PE=mgh
  • FaraDazed
  • · Replies 1 ·
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2012 F = ma Contest, Problem 24
  • luvp
  • · Replies 9 ·
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9
Find the distance with the relativity problem
  • Please Wait
  • · Replies 3 ·
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3
The force of wind blowing on a wall at an angle
  • hyperddude
  • · Replies 4 ·
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Circuit analysis problems with answers
  • Log
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Solving Physics Problem: Momentum of mK Affected by mL
  • BerkS
  • · Replies 7 ·
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7
Pebble falling into water; drag force
  • unscientific
  • · Replies 27 ·
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Moment of inertia physical pendulum
  • arierreF
  • · Replies 11 ·
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11
Solving an Elasticity Problem - Any Help Appreciated!
  • physicist10
  • · Replies 6 ·
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6
Find time, given acceleration as a function of position.
  • tent
  • · Replies 15 ·
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15
How to get the variables m,v^2,h and g
  • epicsauce1137
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Sketching loci in the complex plane
  • jj364
  • · Replies 5 ·
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5
Angular momentum and energy conservation.
  • golanor
  • · Replies 15 ·
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15
What is the significance of having coherent light in a laser?
  • Jye
  • · Replies 3 ·
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Energy needed for a velocity change?
  • Mecia22
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What Is the Escape Speed from the Sun to Mercury at 25 Million Kilometers?
  • Mecia22
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Calculating Kinetic & Potential Energy of Rama's Impact
  • Mecia22
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Rotational and Translational Equilibrium Help Needed
  • hjcrbwg
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How Does Elevator Acceleration Affect Gold Trading Profits?
  • Please Wait
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What is magnetic flux and magnetic flux density? Please keep it simple.
  • martin glen
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How Do You Convert Weight to Newtons in Variable Gravity?
  • Mecia22
  • · Replies 4 ·
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Solving the Olympic Ring Puzzle: Calculate Max Mass
  • SuperHero
  • · Replies 87 ·
3
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Help me proving this Kinetic Friction Coefficient
  • Calabi_Yau
  • · Replies 3 ·
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Tangent to the centrum edge of a circle
  • mimi.janson
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Finding mass of ice, using densities
  • careless25
  • · Replies 3 ·
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3
Slope and Projectile Problem: Finding Distance Covered on a Landing Slope
  • Lolagoeslala
  • · Replies 53 ·
2
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Buoyant force in seawater and freshwater
  • urbano
  • · Replies 5 ·
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Finding velocity and displacement at any time during uniform acceleration motion
  • FaraDazed
  • · Replies 9 ·
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9
Find mom of inertia and frictional torque
  • physicsgirl4
  • · Replies 1 ·
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1
Please help Projectile breaks into fragments question
  • DunWorry
  • · Replies 5 ·
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Calculating Current Through 8Ω Resistor with 2 Cells: Homework Solution
  • asdff529
  • · Replies 3 ·
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RC Circuit: Charges faster than discharges?
  • Frozen Stair
  • · Replies 4 ·
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4
Does Solenoid Diameter Affect Acceleration of a Metal BB?
  • joe_cool2
  • · Replies 2 ·
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Conservation of Energy + Projectile Motion
  • andy343
  • · Replies 7 ·
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Situation involving gravity, a quarter-circular incline plane, and friction.
  • Woolverton
  • · Replies 1 ·
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Dynamics - the physics of tobogganing and forces at an angle
  • L_0611
  • · Replies 2 ·
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What forces act on the supports of a rectangle?
  • hyperddude
  • · Replies 3 ·
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Distance between point charges in equilibrium (simple)
  • Mitocarta
  • · Replies 4 ·
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Projectile Motion - motion on a horizontal surface
  • bonbloc
  • · Replies 2 ·
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2D kinematics - Solved, but a question on the logic
  • Greyt
  • · Replies 3 ·
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3
Gravitational field strength between masses
  • calculator20
  • · Replies 1 ·
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Handicapped pendulum assignment
  • tomkoolen
  • · Replies 3 ·
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3
Forces Concerning a Rectangular Prism
  • hyperddude
  • · Replies 15 ·
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What Problems Can Occur When Automobile Engines Get Too Hot?
  • spaghetti3451
  • · Replies 2 ·
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Very simple conversion problem
  • coffeebird
  • · Replies 9 ·
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9
Optimizing Airplane Manoeuvres: Calculating Time for a Circular Arc Turn
  • Loading
  • · Replies 19 ·
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Can not understand how to divide the components of the vector.
  • arierreF
  • · Replies 8 ·
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8
What is the force on a test charge at the center?
  • spaghetti3451
  • · Replies 8 ·
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8