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.
How can I explain how air resistance damps a pendulum's motion
  • JamieGreggary
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Finding the natural frequency of a steel beam
  • hks118
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4
Skier on a snowball (Newtonian Mechanics)
  • derravaragh
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5
Kinematics: Slowing Car from 54 to 32 km/h in 65 m
  • Inferior Mind
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Graph help on Damping effects on SHM experiment
  • JamieGreggary
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2
Charge on a Sphere: Calc Magnitude & Deficit Electrons
  • quicksilver123
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Two Balls Dropped: Same Time Impact?
  • Toranc3
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2
Calculating Ratio of Time Above ymax/2 to Time from Floor to ymax
  • Toranc3
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How much force to drag an object?
  • c131frdave
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4
Finding the total vertical distance - transverse wave
  • PhysicsFriend
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2
5 blocks connected together on an incline
  • loxo
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1
Kinetic enengy needed to break a board
  • Howlin
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Vertical Projectile Motion Problem
  • TheRedDevil18
  • · Replies 10 ·
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10
Particle motion + electric fields
  • quicksilver123
  • · Replies 6 ·
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6
Overlapping spheres of charge: finding the E field between them
  • jerro
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Lorentz transformations combined with force
  • daselocution
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2
Validity of Newton's 2nd Law in accelerating ref. frame and constant v.
  • Hakkinen
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5
Optics: Finding the wave equation given position and amplitude information
  • azolotor
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1
Free Body Diagram and applied force
  • ThePhysicsBoy
  • · Replies 13 ·
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13
Help differentiating energy wrt time.
  • caius
  • · Replies 4 ·
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4
What am I doing wrong in my calculations
  • aruji73
  • · Replies 7 ·
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7
Re-arranging cosh to make x the subject
  • zfleas
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1
F = ma Exam 2011 # 12 (Gravitational Attraction of Rods and Balls)
  • SignaturePF
  • · Replies 5 ·
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5
Electric Potential and Energy in Parallel Plate Configuration
  • skg94
  • · Replies 9 ·
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9
F=MA 2012 Exam #19: Find Pipe Radius
  • SignaturePF
  • · Replies 8 ·
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8
F = ma 2011 Exam #9 (Ideal Spring problem)
  • SignaturePF
  • · Replies 15 ·
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15
Electric potential at the outer surface of the insulating sphere?
  • bodaciousbob
  • · Replies 1 ·
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1
F = MA 2010 # 11 (Static equilibrium, 3 masses on a string)
  • SignaturePF
  • · Replies 11 ·
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11
How Does Gauss's Law Help Calculate Earth's Total Electric Charge?
  • Lolligirl
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4
Hudson River accident. Friction on water
  • MikeyMike
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2
Why does the E-field inside a cylinder =0?
  • lodovico
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2
Ball thrown striaght up part C
  • Toranc3
  • · Replies 1 ·
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1
Thermal Physics, finding the thermal conductivity of a metal
  • jv616
  • · Replies 1 ·
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1
How Does Moving a Charge Affect Electric Flux in a Cubic Gaussian Surface?
  • CAF123
  • · Replies 16 ·
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16
Resonant frequencies in a tube with adjustable length
  • Von Neumann
  • · Replies 4 ·
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4
Mechanics Problems, involving spring system and gravitation
  • Thundagere
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5
What type of heat transfer is this? Conduction, convector, or radiation?
  • pyroknife
  • · Replies 2 ·
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2
Thermodynamics internal energy Problem
  • liamtcarroll
  • · Replies 1 ·
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1
Water Flowing through U-tubes (Velocity Given Cross-Sectional Areas)
  • SignaturePF
  • · Replies 6 ·
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6
Energy Considerations When A Satellite Changes Orbit
  • Bashyboy
  • · Replies 1 ·
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1
Sniper Projectile Motion: Trajectory and Impact Analysis
  • Inferior Mind
  • · Replies 5 ·
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5
Determing Height To Which A Projectile Will Rise
  • Bashyboy
  • · Replies 9 ·
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9
Distance Travelled in Perfectly Elastic Collision with Friction
  • SignaturePF
  • · Replies 12 ·
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12
Calculating total circuit resistance
  • Jalisi
  • · Replies 5 ·
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5
Why is my calculation for the height of the building off?
  • Toranc3
  • · Replies 4 ·
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4
F = MA 2010 #10 (Two blocks on top of each other, one is being pulled)
  • SignaturePF
  • · Replies 9 ·
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9
F = MA Exam 2010 #'s 15,16 (Two mass system with initial velocity)
  • SignaturePF
  • · Replies 8 ·
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8
A ball is dropped twice off the same initial height. trial one bounces
  • melofc
  • · Replies 4 ·
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4
Block on a Plane - Friction problem
  • bd2015
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Solving for Acceleration using V^2=V0^2+2a(x-x0)
  • tball665
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Very hard Coulomb Force with two charges
  • Ben000
  • · Replies 4 ·
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4
F = MA 2010 Exam # 24 (MoI after shift in CoG)
  • SignaturePF
  • · Replies 6 ·
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6
Finding Acceleration of a Car with a Hanging Mass
  • morrisj753
  • · Replies 4 ·
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4
Circuit 1 with Resistors and Battery
  • kjlchem
  • · Replies 14 ·
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14
Particle collision at an angle
  • Saxby
  • · Replies 3 ·
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3
Particle speed relativity question
  • Artichoke
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Be atom splitting into two helium atoms
  • mc0210
  • · Replies 14 ·
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Resultant vector relative to x and y axis.
  • kaffekjele
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Falling stick with weight on the end
  • leroyjenkens
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Doubling the frequency of a wave
  • Saxby
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Differentiating force to find potential energy
  • Saxby
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2
How Fast Does a Rock Accelerate Past a Window?
  • mgerman63016
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3
Rutherford Experiment, energy and acceleration.
  • skg94
  • · Replies 19 ·
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19
Ring of charge (half positive, half negative)
  • jtran06
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3
Solving Ideal Gas Question: Calculating Total Hydrogen and # of Balloons
  • jiayingsim123
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Law of conservation of energy and springs.
  • firezap
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3
Point Charge and Charged Sphere; Gauss' Law
  • SeanFM21
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5
Question concerning Electromagnetism
  • Shinster007
  • · Replies 2 ·
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2
How Does Friction Affect Energy Between Points B and C?
  • Questions999
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1
Can heat be conducted in ice when only one layer is melted?
  • sgstudent
  • · Replies 12 ·
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12
Diffraction Gratings, confusing question.
  • skg94
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Longitudinal Waves in Air (Experimentally determining the speed of sound)
  • Von Neumann
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Solving the Rock Falling: Velocity & Time
  • Reth0407
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Experimental physics - simplified compound pendulum formula
  • Gauss M.D.
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9
Relativity problem solving help time dilation
  • wackyscience
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3
Angle required to keep block from sliding down plane
  • leroyjenkens
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2
Finding and labeling equilibrium points between multiple point charges.
  • nontradstuden
  • · Replies 1 ·
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Motion in two and three dimensions question?
  • Questions999
  • · Replies 1 ·
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Projectile:body falling down well
  • CAF123
  • · Replies 16 ·
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16
Gauss' Law: Electric Field of Spherical Shell Insulator
  • miniMitts27
  • · Replies 1 ·
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Finding the Height of a Pot On the Y-Axis
  • Juan42
  • · Replies 3 ·
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A Penny Falling Off a Non-moving Sphere
  • Juan42
  • · Replies 1 ·
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Color band colors for 1kΩ resistor
  • pyroknife
  • · Replies 3 ·
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Kinetic Energy and Time Problem
  • jtim36
  • · Replies 3 ·
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3
F = MA 2011 #'s 19, 20 (Force, Kinematics)
  • SignaturePF
  • · Replies 22 ·
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How Far Must a Skier Travel to Reach 48 m/s on a 22° Slope?
  • anne921
  • · Replies 1 ·
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1
Angular Resolution of Telescopes at 500nm: Formula & Explanation
  • oldspice1212
  • · Replies 5 ·
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Finding the electric field on a cylinder with a hole
  • PhysicsRob
  • · Replies 6 ·
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(Very Basic) Movement of Charged Particles Through Parallel Plate Apparatus
  • 012anonymousx
  • · Replies 1 ·
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Work-Energy, Acceleration, and Plates
  • skg94
  • · Replies 7 ·
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7
Newtonian Mechanics - Ball Falling through Syrup
  • derravaragh
  • · Replies 6 ·
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DC circuit steady state (resistors and capacitors)
  • pyroknife
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Calculating Reaction Time from Dropped Meter Stick
  • _physics_noob_
  • · Replies 8 ·
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F = ma 2012 #20 (Apparent weight when dunking wood in water)
  • SignaturePF
  • · Replies 5 ·
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How Many Electrons Are Removed from a Charged Copper Ball?
  • mysticbms
  • · Replies 3 ·
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Determining The Mass Of The Earth
  • Bashyboy
  • · Replies 9 ·
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9
What Are the Correct Responses to These Basic Physics Questions?
  • salman19753
  • · Replies 8 ·
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Find the average speed from t = 0 to t = 1 s
  • valerieangel
  • · Replies 1 ·
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F = MA Exam 2011 # 13 (Rotation/Rolling)
  • SignaturePF
  • · Replies 8 ·
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8
Please help I am finding the new speed and distance traveled of train. Thanks
  • keevo
  • · Replies 5 ·
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