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.
Amount of kWh used to heat water
  • rullervea
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Damped Simple Harmonic Motion - Finding drag constant
  • elemis
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Determining at which point the electric field is zero
  • ughhphysics
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1
Geostationary satellite collision - Orbits
  • unscientific
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7
Combining Resistors and Capacitors
  • megaspazz
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4
How Does Simple Harmonic Motion Apply to Physical Pendulums?
  • cjavier
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4
Torricelli's theorem Derivation help
  • kashan123999
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4
What is the magnitude of an electric field at a certain time?
  • tinabelcher_13
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Can anyone see a better way of solving this?
  • memoguy
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How Does Physics Explain a Fly Sticking into Cake Icing?
  • goli12
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Kinetic Energy Formula definition explanation
  • Selina94
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2
How many particles of air do their lungs contain after inhaling?
  • booooo
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14
Calculate Force for Torque of 16Nm Using Spanner Length 24cm
  • coconut62
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Work energy efficiency car problem
  • freshcoast
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13
How to calculate the torque required to move the gear?
  • aiklone1314
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5
What is the Work Done by Gravity on an Object Moved Straight Up?
  • NathanLeduc1
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Determine the absolute Velocity and Acceleration of Particle A
  • Northbysouth
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7
Kinetic and Potential Energy on a roller coaster
  • NathanLeduc1
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5
Escape velocity for object on Earth
  • thyrgle
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3
Drawing Relative Velocity/Triangle Diagrams?
  • kmizzle
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11
What is the Total Work Required to Drive a Screw Completely into Wood?
  • Gingrbreadman1
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5
Finite Differences Method for Physics
  • fredrogers3
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9
Determine electric field at point P, Electric fields question
  • riken9
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8
Roller Coaster Problem with KE and PE
  • chris61986
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3
Conservation of momentum question. (which is the correct method)
  • chestycougth
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6
Solving Mass-Spring System: Find Spring Constant & Max Stretch
  • CollegeStudent
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7
Hula Hoop Rotational Motion Problem
  • elemons
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1
Frequency away from an oscillating body
  • roberttk01
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1
A charged rod transfers electrons to a neutral conductor
  • RichardEpic
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5
HELP Is my answer correct? Is negative Friction possible?
  • 13physicsdude
  • · Replies 8 ·
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8
Scale Design Using an Angle Measurement for Weight
  • BamaChemE
  • · Replies 14 ·
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14
Calculate Acceleration of Falling Hammer on Moon | 1-D Kinematics Problem
  • RubenL
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Inner Product Space, quick questions.
  • binbagsss
  • · Replies 7 ·
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7
How Do You Calculate Resistance in a Circuit with Only One Current Source?
  • Questions999
  • · Replies 5 ·
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5
Finding acceleration, velocity, and time for simple harmonic motion
  • andreaumali
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1
How to Calculate Hydrostatic Force and Center of Pressure on a Gate?
  • salomatik
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2
Simple electric flux through tetrahedron problem
  • kirby2
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7
How is Work Done on an Object Thrown Up an Inclined Plane Calculated?
  • Felafel
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3
Special Relativity, simultaneity and spatial separation
  • zhillyz
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9
Location and Magnification of Coin's Final Image
  • phunphysics2
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2
Conductance of 2 bodies: Is it dependent on geometry?
  • Arkavo
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Find the tension in the wire - Heat and thermodynamics
  • exuberant.me
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5
Sound waves - Detector and a moving wall
  • Saitama
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21
What Is the Electromagnetic Force on an Electron in Given Fields?
  • Roodles01
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3
Twin Source Interference - Radio Towers
  • elemis
  • · Replies 7 ·
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The maximum speed the truck can go without sliding
  • goli12
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3
HELPHow is this possible? The hanging mass is lighter then the cart
  • 13physicsdude
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3
Time for melting and vaporising a wax candle
  • kotchenski
  • · Replies 9 ·
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9
Elastic vs Gravitational Energy of a System
  • GoGoGadget
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1
Damped Harmonic Motion - Oscillating Spring
  • elemis
  • · Replies 4 ·
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4
Applying conservation of momentum to find recoil of the Earth
  • cherry_cat
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Equivalent Capacitance for 4 capacitors of same capacitance
  • nasdogster
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Using Torque and Tension to find the rate of decreasing tension
  • QuickSkope
  • · Replies 13 ·
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Calculating the torsion constant
  • andreaumali
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1
Tension & Torque, Static Equilibrium
  • MicahP
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Finding acceleration of box- given mass of box and magnitude of frict
  • 13physicsdude
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Gauss Law? Average charge density
  • Roodles01
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10
Finding momentum of a two-block system
  • cherry_cat
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2
Trouble determining the slope of the graph
  • riseofphoenix
  • · Replies 14 ·
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14
Which Quality Does a Fired Cannonball Lack?
  • freshcoast
  • · Replies 7 ·
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7
Finding the Resistance in an RC Circuit
  • hamhamt
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3
Inductance and Magnetic Energy of a Straight Wire
  • AJKing
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Gradient ∇4: Generalizing for Spacetime and Proving its Four-Vector Properties
  • Unicorn.
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Calculating Energy Loss (Kinetic Energy) and Output
  • Hearzy
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8
Work required to increase Earth/Moon separation
  • tony873004
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Stuck for 2hrs on this frequency question
  • icecubz
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Particle in an Electric and Magnetic Field
  • kinof
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4
Is there a net force as someone jumps?
  • student34
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9
What is the Lorentz Transformation for t'?
  • climb515c
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Energy of twin source interference
  • elemis
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Finding resistance in an LC Circuit (FM Radio)
  • Renaldo
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Efficiency of engine taking diatomic ideal gas through cycles
  • jensgt
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6
Why does someone with normal vision not need glasses?
  • Xelb
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Work Energy Problem: Calculate Fg and m in Constant Velocity Scenario
  • TheRedDevil18
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3
Torque for a hanging sign. Finding Tension
  • Jbreezy
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How can a guitarist avoid breaking strings when tuning?
  • myrek
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Angular speed + moment of inertia
  • MicahP
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8
Work Done by Weight Homework: Find W
  • Legerity
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7
Find the Capacitance when the switch is closed
  • SalsaOnMyTaco
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6
Statics, forces in each memeber of a truss
  • jonjacson
  • · Replies 7 ·
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7
Sound waves - Destructive Interference
  • Saitama
  • · Replies 6 ·
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6
Gravitation equations and expressions - gravitational field strength
  • dory
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Potential Energy of water in a wedge
  • irkutsk
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Concept Problem: Oscillation and friction
  • cjavier
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Determining current through a resistor
  • Felicitymaroon
  • · Replies 9 ·
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9
Help with a mechanical energy exercise
  • Felafel
  • · Replies 1 ·
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Conservation of Momentum of masses
  • MostlyHarmless
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Velocity Problem (person/subway)
  • whitehorsey
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How Efficient Are Human Leg Muscles?
  • coconut62
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Resistivity of a material involving temp
  • Felicitymaroon
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How Do You Calculate the Capacitance of a Thundercloud?
  • mathnoobie
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Solving energy-momentum equations for lamba decay
  • jturko
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Optics: Total Internal Reflection with Triangular Prisms
  • everlasting89
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Simple Pendelum - Help with Quadratic Regression on Excel?
  • kmr159
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Torque and Equilibrium of a Rod
  • sketchedwords
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Pressure difference when height changes
  • FollowTheFez
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Solving Resistors in Series: 1.50 V Battery
  • franky1994
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Pressure Question using 'mm-Hg'
  • FollowTheFez
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1
Conservative Forces: The Relationship Between Work and Energy Conservation
  • mcnealymt
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10
Electric Field of Finite, Diagonal Line-Charge
  • AmagicalFishy
  • · Replies 6 ·
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6