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.
Circular Motion, Gravity, Muddy Wheel
  • porschedude
  • · Replies 14 ·
Replies
14
Calculating Tension in a Charged Ball Suspended in an Electric Field
  • Ryoblck
  • · Replies 16 ·
Replies
16
Finding Tension of a Massless Rope
  • Yosty22
  • · Replies 4 ·
Replies
4
How Do You Calculate Voltage Differences Using Kirchhoff's Rules?
  • StarMan1234
  • · Replies 7 ·
Replies
7
Mass revolving around a vertical axis
  • Astrum
  • · Replies 7 ·
Replies
7
The reaction of a spherical surface on an object
  • TheDoctor46
  • · Replies 5 ·
Replies
5
Special relativity:2 ships pass eachother
  • bfusco
  • · Replies 2 ·
Replies
2
Constant angular acceleration problem
  • Paulhaley2000
  • · Replies 1 ·
Replies
1
Physics Electric Field Problem
  • asheik234
  • · Replies 3 ·
Replies
3
What is the maximum instantaneous power that the resistance must withs
  • lizaliiu
  • · Replies 1 ·
Replies
1
Finding Tension using Newton's Laws
  • Mangoes
  • · Replies 4 ·
Replies
4
Calculating Average Acceleration: Rebounding Hockey Puck Example
  • charlotte1208
  • · Replies 1 ·
Replies
1
2 Charged thick plates placed next to each other.
  • Ghastn
  • · Replies 7 ·
Replies
7
Damped harmonic oscillator, no clue
  • Smity
  • · Replies 1 ·
Replies
1
Find the Magnitude of the Normal Force on the Slider and v'
  • Northbysouth
  • · Replies 4 ·
Replies
4
Calculating the capacitance of a parallel-plate air capacitor
  • shandsy
  • · Replies 1 ·
Replies
1
Angular Momentum and Flywheel Energy problem?
  • SecretSnow
  • · Replies 3 ·
Replies
3
C 12B 2009 Problem 17: Finding the Fraction of Air in a Heated Souffle
  • skate_nerd
  • · Replies 2 ·
Replies
2
Find gravitational acceleration through luminosity
  • astrofunk21
  • · Replies 8 ·
Replies
8
What is the power of a pump spraying water at 20 m/s with a 0.05 m radius?
  • New_bee
  • · Replies 6 ·
Replies
6
Boat Speed and Resistance: Solving a Proportion Question in 140 Minutes"
  • avcireis
  • · Replies 27 ·
Replies
27
I dont understand how to find acceleration for the second part
  • Sneakatone
  • · Replies 18 ·
Replies
18
Kirchhoff's Rule: Maximize Dissipation Rate
  • StarMan1234
  • · Replies 12 ·
Replies
12
Comparing Electric Potential and Electric Field
  • MattyP
  • · Replies 1 ·
Replies
1
Acceleration on Inclined Plane and Pulley System
  • aaronfue
  • · Replies 2 ·
Replies
2
Throw a Ball: Find Height Above Ground After .7s
  • VU2
  • · Replies 15 ·
Replies
15
Circuit with Two Batteries and Six Resistors
  • Gee Wiz
  • · Replies 6 ·
Replies
6
Colliding Binary Star (GPE Problem)
  • macaholic
  • · Replies 2 ·
Replies
2
What Factors Determine the Trajectory of a Baseball?
  • Sneakatone
  • · Replies 11 ·
Replies
11
Find the Acceleration of the two joined Blocks
  • Northbysouth
  • · Replies 1 ·
Replies
1
Why Is the Wave Equation Dimensionally Incorrect?
  • Sorgen
  • · Replies 2 ·
Replies
2
2D Kinematics Problem dealing with acceleration
  • Element1674
  • · Replies 5 ·
Replies
5
Electric field within a solid sphere
  • Gee Wiz
  • · Replies 10 ·
Replies
10
Accident Reconstruction using Friction, Energy, Momentum, and Work
  • sparris
  • · Replies 2 ·
Replies
2
Final Speed of a Proton and Electron
  • Bashyboy
  • · Replies 6 ·
Replies
6
Ramp With Friction - Help Appreciated
  • Nfinley1
  • · Replies 5 ·
Replies
5
Why Is Measuring Jupiter's Mass Using Its Four Largest Moons More Accurate?
  • Bashyboy
  • · Replies 5 ·
Replies
5
How Long Does Is take for a car to go from 0-60 MPH
  • lorenamtimas
  • · Replies 3 ·
Replies
3
Projectile Motion of a Secondary Rocket in a Vertical Launch
  • Toranc3
  • · Replies 2 ·
Replies
2
Simple problem with vectors in 3 dimensions
  • Wolftacular
  • · Replies 5 ·
Replies
5
How Do You Calculate Force in Biomechanical Movements?
  • chris.hess
  • · Replies 10 ·
Replies
10
Finding Electric Field of A Sheet Infinite In Magnitude
  • Bashyboy
  • · Replies 9 ·
Replies
9
Calculate forces on a fixed beam
  • dreamliner
  • · Replies 3 ·
Replies
3
Energy density and range calculation Electric Vehicle
  • Bianca12
  • · Replies 18 ·
Replies
18
Coulombs law, initial speed to collide with other nucleus
  • skate_nerd
  • · Replies 3 ·
Replies
3
Calculate the Vertical Acceleration
  • Northbysouth
  • · Replies 1 ·
Replies
1
How to determine what sign (+/-) to use?
  • nothanksjeff
  • · Replies 1 ·
Replies
1
I on finding seconds from maximum height.
  • Sneakatone
  • · Replies 6 ·
Replies
6
Centripetal Force Ball Swing Question
  • tcc88
  • · Replies 8 ·
Replies
8
Two masses connected to a spring.
  • Sefrez
  • · Replies 6 ·
Replies
6
What Is the Time Interval of Lightning Strikes Observed by a Train Passenger?
  • bfusco
  • · Replies 18 ·
Replies
18
Finding the Magnitude and Direction of Magnetic Field of 2 parallel wi
  • physicshelpnow
  • · Replies 1 ·
Replies
1
Quadratic Graph & Bouncing Ball
  • tariel
  • · Replies 10 ·
Replies
10
How Fast Does the -8.051 μC Charge Travel to Position A?
  • loganhey
  • · Replies 7 ·
Replies
7
Gauss's Law insulating cylinder concentric shell
  • ilovetswift
  • · Replies 3 ·
Replies
3
Drawing a shear force diagram with loads working at an angle
  • dreamliner
  • · Replies 1 ·
Replies
1
Where Does \(\frac{1}{2}x\) Come From at \(k=1\)?
  • izen
  • · Replies 2 ·
Replies
2
Thermodynamics. Find the Mass Flow Rate of the Air and the Exit Area
  • Northbysouth
  • · Replies 1 ·
Replies
1
Forces for Differing Masses and Accurately Reporting Them
  • KayCup
  • · Replies 5 ·
Replies
5
Initial displacement in Simple Harmonic Motion
  • heartyface
  • · Replies 7 ·
Replies
7
Capacitor help needed (voltage needed and time constant question)
  • LTME
  • · Replies 2 ·
Replies
2
Left-over AC voltage in a half-wave rectifier
  • JJBladester
  • · Replies 6 ·
Replies
6
Mass of Condensed Water Out of a Moist Air Stream
  • rcl5011
  • · Replies 10 ·
Replies
10
Gravity and mass with Jupiter's moons
  • Surgikill117
  • · Replies 2 ·
Replies
2
Binary stars ,time period of orbit?
  • humanist rho
  • · Replies 8 ·
Replies
8
Newton's third law, bullet through wood question
  • MightyMuddy
  • · Replies 14 ·
Replies
14
What is the index of refraction of this unknown material?
  • cjhockey35
  • · Replies 3 ·
Replies
3
Thermodynamics problem - internal energy of a saturated steam?
  • theBEAST
  • · Replies 2 ·
Replies
2
Find Direction and Angle to arrive directly across initial location?
  • Stanc
  • · Replies 6 ·
Replies
6
How can I Find all V in Resistor, and all Currenst flowing?
  • shojimar
  • · Replies 2 ·
Replies
2
How Does Projectile Angle Affect Range in Physics?
  • Questions999
  • · Replies 3 ·
Replies
3
Speed of a Car on Straight Road
  • nody
  • · Replies 1 ·
Replies
1
Vector Plane, Calculating Windspeed Question?
  • Stanc
  • · Replies 8 ·
Replies
8
Whirling Rope - Find the Tension at Position r
  • Astrum
  • · Replies 17 ·
Replies
17
Rainwater Accumulation on Moving Truck: Momentum Conservation
  • CAF123
  • · Replies 24 ·
Replies
24
Rolling Motion, confusing with linearizing a graph?
  • tariel
  • · Replies 4 ·
Replies
4
Vertical Motion Scenario Solving for Velocity
  • cassc94
  • · Replies 2 ·
Replies
2
Finding the thickness of a double convex lens
  • chris_0101
  • · Replies 1 ·
Replies
1
What Is the Maximum Height of the Rocket After Engine Failure?
  • revults
  • · Replies 4 ·
Replies
4
How to read superheated water tables?
  • theBEAST
  • · Replies 1 ·
Replies
1
Finding Magnitude of Unkown Force on Rough Horizontal Surface
  • FaraDazed
  • · Replies 4 ·
Replies
4
Intertial mass and determining the value of gamma
  • daselocution
  • · Replies 1 ·
Replies
1
Find the angle of a force by means of graphic solution
  • kaffekjele
  • · Replies 3 ·
Replies
3
Electric Potential for Concentric Cylinders
  • mrshappy0
  • · Replies 15 ·
Replies
15
Applying Gauss's Law Several Times
  • Bashyboy
  • · Replies 24 ·
Replies
24
Electric field due to a line of charge
  • Gee Wiz
  • · Replies 16 ·
Replies
16
Differentiating electrostatic force
  • Saxby
  • · Replies 2 ·
Replies
2
Parallel plate - uniform electric field help
  • alittlelost
  • · Replies 1 ·
Replies
1
What Is the Power Output of a Car Accelerating from Rest in First Gear?
  • TheRedDevil18
  • · Replies 4 ·
Replies
4
Magnification equation problem
  • Saxby
  • · Replies 7 ·
Replies
7
R-L Transient Circuit: Find Time Constant & Energy Stored in Inductor
  • freshbox
  • · Replies 16 ·
Replies
16
Relative Motion- Airplane/Wind
  • revults
  • · Replies 7 ·
Replies
7
Binary Star System Period of Revolution
  • derravaragh
  • · Replies 1 ·
Replies
1
Find electric Field through 3 plates using Gausses Law
  • Broem
  • · Replies 1 ·
Replies
1
Which runner has a larger maximum speed?
  • lorenamtimas
  • · Replies 2 ·
Replies
2
Calculating Flux Through a Gaussian Spherical Shell Inside a Charged Sphere
  • Gee Wiz
  • · Replies 1 ·
Replies
1
Can Duct Tape Really Hold a Person Against a Wall?
  • barrywhite
  • · Replies 1 ·
Replies
1
Kirchhoff's Rule: Find Current in Resistors
  • phunphysics2
  • · Replies 1 ·
Replies
1
Find forces acting on a combined beam with load.
  • dreamliner
  • · Replies 4 ·
Replies
4
Why is it hard to discover new energy sources?
  • Miyz
  • · Replies 6 ·
Replies
6