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.
Two Charged Masses Suspended From Strings
  • Geromy
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14K
Computing energy in the electron of Li 2+?
  • robertjordan
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2K
'Eyeballing' non-zero divergence and curl from vector field diagrams
  • mindarson
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6
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7K
Shortest collision time that will leave engine block intact?
  • kvkenyon
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9
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4K
Distance Traveled & Average Speed
  • dgsigala
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5
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2K
Fraction of a distance (1D Kinematics)
  • chatnay
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1
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3K
Final Temperature of Ideal Gas in Constant Pressure and Volume Compression
  • chicagobears34
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Finding number of atoms per cm^3 of zinc?
  • robertjordan
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1
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9K
Calculate flux through face of a cube
  • mindarson
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2
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3K
Deriving a forumla for the gradient in cylindrical coordinates
  • wifi
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4
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2K
Vector Components: Equal Force of Two Wires Suspending 500N Sign
  • Coco12
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4K
Help on a project for Physics class. Already have one idea
  • PerfumeLover
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1
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Colliding Trains: Will Cows Witness It?
  • lep11
  • · Replies 17 ·
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17
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6K
Vectors - Driving a car between time zones
  • Coco12
  • · Replies 3 ·
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3
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Calculating Internal Resistance of a Worn-Out Battery
  • Sastronaut
  • · Replies 10 ·
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10
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3K
Calculate Current Through R3: Negative Possible?
  • Sastronaut
  • · Replies 7 ·
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7
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2K
Circuit Problem with diodes and resistors with sine wave input
  • GreenPrint
  • · Replies 15 ·
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15
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3K
Is \( x_0 \cos(\theta) \) Misinterpreted in Radial Coordinates?
  • SlowProgress
  • · Replies 4 ·
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4
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2K
How Is Impulse Calculated in a Two-Cart Collision?
  • dylanhouse
  • · Replies 3 ·
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3
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3K
Electric Field- Infinite Plane Charge Infinite Line Charge
  • MostlyHarmless
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2
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2K
Tangential and Centripetal Acceleration
  • kwenz21
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3
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3K
Charge On A Infinite Conductor Slab From An Infinite Sheet Of Charge
  • Baumer8993
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1
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4K
Find V3 to Make I in 10Ω Resistor Zero
  • Sastronaut
  • · Replies 2 ·
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2
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2K
One Dimentional Relative Motion
  • shizaep
  • · Replies 3 ·
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3
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2K
Physics Help Greatly Appreciated - Block sliding down ramp
  • Engineering101
  • · Replies 4 ·
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4
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7K
Theoretical Curve Graph vs Straight Line
  • Richard Ros
  • · Replies 1 ·
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1
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2K
Gravitation Problem (Please check my work)
  • PsychonautQQ
  • · Replies 6 ·
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6
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2K
Finding electric field of a bent uniform charged rod.
  • freshcoast
  • · Replies 10 ·
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10
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7K
Hypervelocity Planet: Orbital Dynamics of a Star-Planet System
  • bowlbase
  • · Replies 6 ·
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6
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2K
Kirchoff's Loop Rule: Compute R2 Current
  • Sastronaut
  • · Replies 6 ·
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6
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2K
Solving the Mystery of the Rock's Velocity
  • Sylis
  • · Replies 15 ·
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15
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4K
How long does it take for the sun to produce 10,000 KWh on a 31,700 m² surface?
  • Dassinia
  • · Replies 7 ·
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7
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2K
Resultant Velocity & Time for Crossing Stream: Vectors Comp. HW
  • Coco12
  • · Replies 3 ·
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3
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6K
Component resolution of g on an inclined plane
  • themselv
  • · Replies 4 ·
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4
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5K
Find the Wavelengths of Red and Blue Light in a Grating Spectrometer
  • Gee Wiz
  • · Replies 2 ·
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2
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6K
Find the direction in which slope is the steepest
  • wifi
  • · Replies 11 ·
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11
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5K
Resultant displacement of vectors
  • Coco12
  • · Replies 2 ·
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2
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3K
Possible Rectangular Potential Barrier Transmission Problem
  • member 422733
  • · Replies 4 ·
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4
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3K
Do images move faster than objects?
  • Violagirl
  • · Replies 2 ·
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2
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3K
How Many Electrons Are Needed to Accelerate Two Charged Spheres at 25g?
  • flynnk567
  • · Replies 3 ·
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3
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3K
Evaluating an exponential function that models a real-world situation
  • Drakkith
  • · Replies 4 ·
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4
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6K
Quick question about PhotoElectric Effect
  • kougou
  • · Replies 1 ·
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1
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2K
Finding v of a charged particle in a uniform magnetic field
  • ThereIam
  • · Replies 7 ·
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7
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3K
A 10g mass suspended from a string is immersed into a liquid
  • GreenTea09
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1
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Magnetic moment of a solid, uniformly charged ball
  • six7th
  • · Replies 5 ·
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5
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Find acceleration from distance and time, with a twist
  • qwertyertyuiop
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1
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3K
Why do we need to pick a very small A for curved surfaces in electrostatics?
  • bowlbase
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Acceleration in Two Dimensions (Vector)
  • trapones
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1
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How do you solve the d(λmu) equation in relativistic energy?
  • kbeach
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Breaking Bad Pizza Throw Physics Calculation.
  • bala_phy
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What is the speed of the ball when it leaves Sarah's hand?
  • Alcubierre
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Integral on the surface of a sphere - course notes
  • Dassinia
  • · Replies 23 ·
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23
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Circuits Q&A: My Question About Vdb
  • Miike012
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1
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2K
Finding the Angle of Trajectory
  • Lamebert
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4
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5K
What is the Index of Refraction in a Crystal Sphere Focusing Light?
  • Aelo
  • · Replies 12 ·
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Electric force in an electric field.
  • MostlyHarmless
  • · Replies 6 ·
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6
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2K
Determining charge of q and the spring coated with metal?
  • Richard Ros
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1
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Finding velocity of gas molecule
  • Miike012
  • · Replies 15 ·
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Buoyant Force Problem: Equilibrium and Submerged Objects Explained
  • PsychonautQQ
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Find the magnitude and the direction of the electric field at the thir
  • Richard Ros
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4
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The ratio of the gravitational force between electron and proton
  • Richard Ros
  • · Replies 7 ·
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7
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Frictional talk - mass suspended from a flywheel
  • brenfox
  • · Replies 6 ·
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6
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3K
Hooke's law and the Coulomb force
  • Ampere
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Problem from physics teacher newsletter
  • what2wham1
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2K
How would one approach such problem?
  • NasuSama
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5
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Light scattering homework question (rayleign scattering)
  • haitianstudent
  • · Replies 4 ·
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4
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8K
Why Is the Coefficient of Restitution Calculated as (Va - Vb)/(Vb - Va)?
  • Gank
  • · Replies 3 ·
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3
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2K
Motion Problem with two moving masses
  • Gank
  • · Replies 25 ·
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25
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3K
Solving one-dimensional Motion Problems
  • Sylis
  • · Replies 3 ·
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3
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5K
How to find magnetic dipole force?
  • PhizKid
  • · Replies 1 ·
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1
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2K
Does the Volume of Water in a Tube Affect Net Force on a Barrel?
  • PsychonautQQ
  • · Replies 8 ·
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8
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How Do You Determine the Angle β for Light Traveling Parallel Inside a Prism?
  • haitianstudent
  • · Replies 1 ·
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7K
Critically Damped Bathroom Scale
  • jguilherme137
  • · Replies 2 ·
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2
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3K
How Does Lorentz Transformation Affect Muon Decay Observations?
  • Steelangel
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1
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What Determines the Direction of Potential Gradient?
  • Yosty22
  • · Replies 2 ·
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Kinematics: Projectile Motion, Constant Acceleration
  • SammyLP250
  • · Replies 16 ·
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16
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6K
How Fast Must a Laser Move to Exceed Light Speed on the Moon's Surface?
  • leroyjenkens
  • · Replies 13 ·
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13
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3K
BALL DROP EXPERIMENT: calculation of the magnitude of G
  • Brittbrit22
  • · Replies 1 ·
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1
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What is the magnitude of force vector?
  • ozzolins
  • · Replies 11 ·
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3K
What is the magnitude of Electric Field at r=R/2
  • jaydnul
  • · Replies 7 ·
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7
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4K
How to make a mathematica code with vectors and magnitude
  • Sneakatone
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1
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Uniform line of charge and point charge
  • noagname
  • · Replies 5 ·
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5
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11K
Calculating Momentum with Constant Force
  • Alucard2487
  • · Replies 6 ·
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6
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6K
How Do You Calculate Velocity from a Graph with Two Points?
  • butter231
  • · Replies 2 ·
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2
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Calculating Horizontal Distance of a Proton in a Parallel-Plate Capacitor
  • tuggler
  • · Replies 16 ·
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16
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8K
How Does Height Influence Torque in Static Equilibrium?
  • member 392791
  • · Replies 15 ·
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15
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Find the net electric field these charges produce
  • yaro99
  • · Replies 3 ·
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3
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29K
What is the tension at point A below the x-z plane?
  • member 392791
  • · Replies 4 ·
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4
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2K
Interpreting Velocity vs Time Graphs
  • nsn7
  • · Replies 6 ·
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6
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3K
Solve 3D Kinematics Problem with Homework Equations | Attempted Solution
  • togame
  • · Replies 2 ·
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2
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4K
Deriving acceleration from Position vector help
  • kpadgett
  • · Replies 9 ·
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9
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18K
Shooting Rifles from Platforms - Projectile question
  • Niner1309
  • · Replies 6 ·
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6
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6K
Equilibrium radioactive decay question
  • nateja
  • · Replies 2 ·
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2
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3K
Projectile Questions: Solving Max Height & Xmax
  • KingPapaya
  • · Replies 41 ·
2
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41
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4K
Why Does Thin Film Oil Show Different Colors When Illuminated?
  • whitehorsey
  • · Replies 4 ·
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4
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9K
How to solve a velocity problem as an initial condition problem
  • Wolvenmoon
  • · Replies 4 ·
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4
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4K
Moving and not moving people using Lorentz transformation
  • leroyjenkens
  • · Replies 21 ·
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21
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3K
Change in velocity when given a graph that shows time and acceleration
  • flynnk567
  • · Replies 2 ·
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2
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10K
Deriving The Work-Energy Theorem
  • Superman1271
  • · Replies 20 ·
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20
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6K
Doppler equation not making sense to me
  • PsychonautQQ
  • · Replies 4 ·
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4
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2K