Introductory Physics Homework Help Forum

Post thread
Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Ground state of 7 electrons in infinite square well
  • sabinscabin
  • · Replies 3 ·
Replies
3
Views
9K
Light - Thin Film interference
  • Foxhound101
  • · Replies 11 ·
Replies
11
Views
23K
Parallel Plate Capacitors Being Separated
  • Fizzicist
  • · Replies 4 ·
Replies
4
Views
12K
Calculating Lift Force and Air Resistance in a Moving Helicopter
  • PhysicFailure
  • · Replies 3 ·
Replies
3
Views
4K
Calculating Change in Charge Density for a Parallel-Plate Capacitor
  • just.karl
  • · Replies 8 ·
Replies
8
Views
3K
Solving Complex Exponentials: Deduce & Explain Relation w/ Vector Diagram
  • kevi555
  • · Replies 6 ·
Replies
6
Views
4K
Calculating the Critical Distance for Spaceship Gravity: A Scientific Approach
  • brookbj
  • · Replies 6 ·
Replies
6
Views
3K
How Does Acceleration Affect Pendulum Frequency?
  • akan
  • · Replies 4 ·
Replies
4
Views
5K
Momentum of Photon with Energy of 2500000 Ergs: 8.3*10^-10 J*s/m
  • melissajohn
  • · Replies 3 ·
Replies
3
Views
2K
At what angle should the gun be aimed to hit the target?
  • ross the hoss
  • · Replies 1 ·
Replies
1
Views
3K
The last static equilibrium problem.
  • akan
  • · Replies 4 ·
Replies
4
Views
5K
Answer Check for kinematic in 2-d
  • Filenes
  • · Replies 2 ·
Replies
2
Views
4K
Projectile Motion: Calculating Flight Time and Initial Speed
  • jarrellboog04
  • · Replies 24 ·
Replies
24
Views
8K
Calculating Force and Velocity of a Launched Water Balloon
  • Mike_r
  • · Replies 1 ·
Replies
1
Views
2K
Solve Relativity Questions: Spacetime Coordinates in Reference Frames
  • fredrick08
  • · Replies 18 ·
Replies
18
Views
8K
What direction does the wreckage move after two cars collide and stick together?
  • aj_2008
  • · Replies 2 ·
Replies
2
Views
3K
Circular Curve of a Highway problem
  • mossfan563
  • · Replies 5 ·
Replies
5
Views
5K
How Do You Calculate the Equations of Motion for a Skydiver with Drag?
  • ko_kidd
  • · Replies 1 ·
Replies
1
Views
3K
Kinetic and static frictional forces
  • Leestyn
  • · Replies 1 ·
Replies
1
Views
2K
How Do I Solve These Four Physics Motion Problems?
  • psp101
  • · Replies 3 ·
Replies
3
Views
3K
How Much Runway Does a Jet Need for Takeoff?
  • OxxCloudxxO
  • · Replies 8 ·
Replies
8
Views
6K
Max and min speed around banked curve
  • diablo2121
  • · Replies 3 ·
Replies
3
Views
13K
Path Coordinates and constant circular acceleration.
  • Buckshot23
  • · Replies 1 ·
Replies
1
Views
4K
How Do Charges Distribute in Series vs. Parallel Circuits?
  • ally1h
  • · Replies 1 ·
Replies
1
Views
4K
How Is the Electric Field Distributed Around Concentric Cylindrical Conductors?
  • bodensee9
  • · Replies 4 ·
Replies
4
Views
4K
Tricky Kinematics: Projectile Motion in 2D
  • guty316
  • · Replies 3 ·
Replies
3
Views
2K
What Inclination Angle Causes a Car to Slide Downhill at Constant Velocity?
  • CaptainSFS
  • · Replies 8 ·
Replies
8
Views
4K
Uniform circular motion equation
  • HelloMotto
  • · Replies 3 ·
Replies
3
Views
4K
Frictionless Ski Jump at an angle
  • Phoenixtears
  • · Replies 1 ·
Replies
1
Views
6K
Circular motion (Newton's 3 Laws)
  • southernbelle
  • · Replies 1 ·
Replies
1
Views
4K
How Does Ramp Angle Affect the Maximum Height Reached by a Block?
  • girlsnguitars
  • · Replies 2 ·
Replies
2
Views
9K
What is the charge on the droplet?
  • ally1h
  • · Replies 8 ·
Replies
8
Views
7K
Simple harmonic motion , Particle
  • EvilBunny
  • · Replies 1 ·
Replies
1
Views
5K
Calculate Swing Length of Ballistic Pendulum | 25-gm Bullet at 300m/sec
  • acissej_o3
  • · Replies 4 ·
Replies
4
Views
3K
Determining Speed & Angle of Raindrops Relative to Ground
  • laxman31757
  • · Replies 1 ·
Replies
1
Views
4K
Vibration Platform: Find Frequency for Rock Clatter
  • gonzalo12345
  • · Replies 1 ·
Replies
1
Views
5K
How Does Frictionless Slope Affect Acceleration?
  • bamfdan
  • · Replies 1 ·
Replies
1
Views
2K
Equations of linear motion in terms of films
  • tonto995566
  • · Replies 1 ·
Replies
1
Views
2K
What Acceleration Is Needed for Ion Deflection in Cancer Treatment?
  • monkey888888
  • · Replies 1 ·
Replies
1
Views
5K
Solving Flow Rate Problem to Increase Pipe Diameter by 5.3
  • Andrusko
  • · Replies 2 ·
Replies
2
Views
3K
What is the role of dimensional analysis in solving physics equations?
  • mjolnir80
  • · Replies 6 ·
Replies
6
Views
3K
Electric Field in Gaussian Spheres: Equilibrium and Charge Distribution
  • antingtom
  • · Replies 1 ·
Replies
1
Views
3K
Electric Field Inside a Cylindrical Gaussian Surface: Exploiting Symmetry
  • jaejoon89
  • · Replies 3 ·
Replies
3
Views
2K
How Does Gauss's Law Explain Net Flux in Electric Fields?
  • jaejoon89
  • · Replies 2 ·
Replies
2
Views
2K
Mass flowing through fluid at constant velocity
  • waswik
  • · Replies 2 ·
Replies
2
Views
3K
How Does Friction Affect Spring Motion on a Rough Surface?
  • jspek9
  • · Replies 3 ·
Replies
3
Views
2K
Calculating Flux for a Uniform Electric Field at an Angle
  • ayestaran1
  • · Replies 4 ·
Replies
4
Views
3K
Forces on a Door Homework: Solution Attempt
  • Darkalyan
  • · Replies 12 ·
Replies
12
Views
7K
Maximum angle of rolling without slipping.
  • synth
  • · Replies 3 ·
Replies
3
Views
18K
Easy question that I'm not getting?
  • dominus96
  • · Replies 4 ·
Replies
4
Views
3K
What Is the Relative Velocity of Two Colliding Planets?
  • lzh
  • · Replies 2 ·
Replies
2
Views
2K
Parallel RLC circuit: find resonant frequency and Input at that frequency
  • VinnyCee
  • · Replies 7 ·
Replies
7
Views
49K
Calculating Elevator Acceleration and Velocity?
  • crhscoog
  • · Replies 2 ·
Replies
2
Views
11K
How Does the Speedometer Reading Change as an Object Falls?
  • missie
  • · Replies 11 ·
Replies
11
Views
2K
Resultant Magnitude of Two Forces
  • ut4ever8
  • · Replies 2 ·
Replies
2
Views
23K
Terminal velocity of a body of mass
  • musicfairy
  • · Replies 4 ·
Replies
4
Views
7K
Refraction 2: Is Larger Angle Refraction Possible?
  • GillaGorilla
  • · Replies 1 ·
Replies
1
Views
1K
Magnitude of the Sum of Vectors
  • vrobins1
  • · Replies 1 ·
Replies
1
Views
3K
Finding charge based on net force and other charges
  • jelliDollFace
  • · Replies 9 ·
Replies
9
Views
16K
Solving Gravity: Initial Velocity & Time
  • Sammiches
  • · Replies 1 ·
Replies
1
Views
2K
Internal Resistance: Solving for Battery Emf 9.30 V and Load 60.0 Ω
  • goWlfpack
  • · Replies 2 ·
Replies
2
Views
2K
How Does a Pulley System Affect Tension on an Inclined Plane?
  • pikapika1
  • · Replies 9 ·
Replies
9
Views
14K
How Long Does It Take to Retrieve a Floating Lunchbox in a River Scenario?
  • lmlgrey
  • · Replies 1 ·
Replies
1
Views
3K
Can You Solve These Challenging Physics Problems?
  • tristan4040
  • · Replies 1 ·
Replies
1
Views
7K
How do Newton's Laws relate to friction and inclined ramps?
  • sktgurl930
  • · Replies 5 ·
Replies
5
Views
3K
Calculating Acceleration for a System of Frictional Forces with Two Cubes
  • am92
  • · Replies 1 ·
Replies
1
Views
2K
Radii for a circular path of a proton.
  • Lance WIlliam
  • · Replies 1 ·
Replies
1
Views
5K
Capacitance, switches, and lightbulbs oh my
  • goWlfpack
  • · Replies 1 ·
Replies
1
Views
5K
Determining Force of Fb: Homework Statement
  • Eternal Sky
  • · Replies 2 ·
Replies
2
Views
3K
Visualize Horizontal Motion: Draw Diagram & Graphs
  • zuber
  • · Replies 1 ·
Replies
1
Views
3K
A problem that has force, friction on an incline
  • musicfairy
  • · Replies 4 ·
Replies
4
Views
9K
Acceleration in 1 dimension (Conceptual)
  • skwz
  • · Replies 2 ·
Replies
2
Views
12K
Finding the electric field magnitude in a parallel plate compacitor.
  • nemisisnik
  • · Replies 5 ·
Replies
5
Views
11K
Cop A Catches Thief: Time to Catch & Calculation
  • Sakha
  • · Replies 1 ·
Replies
1
Views
2K
Four trains coupling - find speed of resulting train
  • dsptl
  • · Replies 1 ·
Replies
1
Views
2K
Discovering Force: Acceleration with a Meter Stick at 30° Angle
  • Larrytsai
  • · Replies 1 ·
Replies
1
Views
2K
Acceleration of System of Objects w/ m1=10kg, m2=20kg
  • Nanoath
  • · Replies 1 ·
Replies
1
Views
3K
What Is the Correct Magnetic Field Strength at the Surface of a Wire?
  • Lance WIlliam
  • · Replies 1 ·
Replies
1
Views
3K
What Angle Does the Plumb Bob Make with the Vertical on a Sliding Frame?
  • Jstew
  • · Replies 1 ·
Replies
1
Views
3K
Is My Solution to This Force/Friction Physics Problem Correct?
  • musicfairy
  • · Replies 1 ·
Replies
1
Views
3K
How Do You Calculate the Damping Coefficient of a Pendulum in Water?
  • math111
  • · Replies 1 ·
Replies
1
Views
4K
Is the Force in r = a cos(wt) i + b sin(wt) j Conservative?
  • LilithBlack
  • · Replies 1 ·
Replies
1
Views
2K
Satelite Tracking: Solving My Career Advancment Puzzle
  • jstrz13phys
  • · Replies 2 ·
Replies
2
Views
3K
Solving Physics Homework: Find Acceleration & Tension
  • Husker70
  • · Replies 1 ·
Replies
1
Views
2K
How is Tension Distributed in a Massless Pulley System?
  • pikapika1
  • · Replies 12 ·
Replies
12
Views
5K
Floating speck of dust with charge
  • roz77
  • · Replies 1 ·
Replies
1
Views
3K
Help with a kinematics question
  • danhamilton
  • · Replies 6 ·
Replies
6
Views
2K
Elevator Problem w/ app. Weight
  • Bachi234
  • · Replies 1 ·
Replies
1
Views
7K
Kinematics - free fall/projectile
  • rhodium
  • · Replies 4 ·
Replies
4
Views
7K
Force / elastic potential energy of a rubber band
  • Heirot
  • · Replies 1 ·
Replies
1
Views
10K
Mass and speed of (current) electrons
  • Bjarne
  • · Replies 2 ·
Replies
2
Views
2K
How far does the particle travel?
  • hichangkyu
  • · Replies 3 ·
Replies
3
Views
6K
Yet another static equilibrium problem.
  • akan
  • · Replies 5 ·
Replies
5
Views
3K
Push a Block against a Wall- Static Friction
  • Phoenixtears
  • · Replies 2 ·
Replies
2
Views
25K
How to Solve a Tough Concept Question: Rifle Aiming Experiment
  • zn23
  • · Replies 3 ·
Replies
3
Views
7K
Speed of ship as fraction of speed of light
  • Dannya
  • · Replies 2 ·
Replies
2
Views
5K
Physics homework help, how to set up problem
  • RubrickZero
  • · Replies 3 ·
Replies
3
Views
2K
Stopping Distance of a Locomotive with Failed Engine and Brakes
  • Phoenixtears
  • · Replies 2 ·
Replies
2
Views
3K
What is the solution to the garden cart torque problem?
  • akan
  • · Replies 4 ·
Replies
4
Views
5K
Finding the Magnitude of a Horizontal Force on a Frictionless Inclined Plane
  • veronicak5678
  • · Replies 12 ·
Replies
12
Views
6K