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 much power is needed to steer tires?
  • qpham26
  • · Replies 9 ·
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9
Calculating Force of Friction: A Homework Help Guide
  • tyler hartman
  • · Replies 8 ·
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8
What is the Wave Equation for a String?
  • Stealth849
  • · Replies 10 ·
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10
R through a wire: What's the max error in diameter if your R has 1% uncertainty?
  • anban
  • · Replies 4 ·
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4
Use Planck’s radiation law to derive the Stefan-Boltzmann
  • modphysnoob
  • · Replies 1 ·
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1
Find period of astronaut when Normal force of ship = normal force on earth
  • kariibex
  • · Replies 1 ·
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1
Help with rearranging equations for gas laws
  • talebone
  • · Replies 4 ·
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4
Mass, Weight and the local acceleration due to gravity
  • Northbysouth
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1
How Far is Charge Q1 from Point P Where the Electric Field is Zero?
  • AyooNisto
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1
What is the speed of the string? (wave problem)
  • bored2death97
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2
How Do You Calculate the Mass of a Steel I-Beam?
  • mynameiscool
  • · Replies 3 ·
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3
Calculating Kinetic and Potential Energy of a Falling Object
  • Coco12
  • · Replies 9 ·
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9
Rutherford's Formula & Alpha Particle Scattering Disagreement
  • rbwang1225
  • · Replies 4 ·
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4
Help finding the magnitude of the net force
  • dragon18
  • · Replies 1 ·
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1
Tension in Fixed Pulleys: Understanding Forces and Equilibrium
  • Bipolarity
  • · Replies 1 ·
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1
What Was the Initial Velocity of the Bullet in the Momentum Problem?
  • robertmatthew
  • · Replies 16 ·
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16
Attraction of a steel rod with a solenoid
  • sgstudent
  • · Replies 7 ·
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7
Find Io in the network nodal analysis
  • Color_of_Cyan
  • · Replies 6 ·
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6
Special Relativity, calculating velocity of Kl0 meson with reference frames
  • PhysicsProblem
  • · Replies 4 ·
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4
How Do You Calculate Time in a Charging Capacitor Equation?
  • MidlandSoul
  • · Replies 4 ·
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4
Finding the Equivalent Force: Solving for a Single Force in Basic Mechanics
  • DanB1993
  • · Replies 7 ·
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7
What Is the Velocity and Net Force After Two Football Players Collide?
  • quicksilver123
  • · Replies 6 ·
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6
Three blocks Newtons law help have I got my answers and sign correct ?
  • aruji73
  • · Replies 6 ·
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6
When Will the Two Trains Collide?
  • Toranc3
  • · Replies 4 ·
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4
Finding Equilibrium: How to Solve Force Problems Involving Poles and Objects?
  • has1993
  • · Replies 14 ·
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14
Vector addition word problem question
  • personguything
  • · Replies 8 ·
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8
Velocity of a steel ball bearing due to magnetic force
  • jonc1258
  • · Replies 4 ·
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4
Electron/Positron Annihilation
  • Von Neumann
  • · Replies 4 ·
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4
How Do You Calculate Angular Motion for a Child on a Merry-Go-Round?
  • LizAnn10
  • · Replies 3 ·
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3
Determining the time of a collision
  • robertmatthew
  • · Replies 3 ·
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3
What will be the acceleration of an electron when it is at the origin?
  • AxM=Fam
  • · Replies 3 ·
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3
Circular motion x, y acceleration
  • aruji73
  • · Replies 5 ·
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5
What Is the Least Time for Blocks to Move 7.20m Without Sliding?
  • Nbwx
  • · Replies 4 ·
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4
Help with Point Charges and Charge by Contact
  • talebone
  • · Replies 12 ·
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12
Thrust separate from acceleration?
  • bd2015
  • · Replies 1 ·
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1
What is your velocity when walking on a moving train in the opposite direction?
  • aruji73
  • · Replies 2 ·
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2
How Do You Calculate the Speed of a Plane with Respect to the Ground?
  • aruji73
  • · Replies 3 ·
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3
Constant Acceleration of a skier Problem
  • bmb2009
  • · Replies 4 ·
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4
How Do Forces Affect Motion on Inclined Planes?
  • Bipolarity
  • · Replies 3 ·
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3
Finding Work function and Plank constant
  • modphysnoob
  • · Replies 2 ·
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2
Find the components of a unit vector
  • seanster1324
  • · Replies 2 ·
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2
Charge on a point in three different locations with a thin semicircular rod
  • swagadoo
  • · Replies 11 ·
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11
Acceleration and Kinetic Energy
  • k0k
  • · Replies 4 ·
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4
Finding the impedance of circuits.
  • RobLikesBrunc
  • · Replies 5 ·
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5
Are Identical Masses' Angles Equal for Different Charges?
  • anban
  • · Replies 2 ·
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2
Locomotives on a collision track
  • kopinator
  • · Replies 1 ·
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1
Thermodynamics and Mechanics questions
  • nasar176
  • · Replies 3 ·
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3
What is the Standard Deviation of the Mean for Lab Homework Data?
  • jumi
  • · Replies 9 ·
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9
Polarizing Light through Two Filters
  • thiefjack
  • · Replies 2 ·
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2
Simple Harmonic Motion: Calculating Mass and Frequency
  • quicksilver123
  • · Replies 9 ·
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9
Optics question, locate mirror and its focal length
  • SlothNast
  • · Replies 3 ·
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3
Rate of energy release by Polonium-210
  • influx
  • · Replies 1 ·
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1
Forces Acting on Mass M on Wedge
  • Gloyn
  • · Replies 2 ·
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2
What is the strength of the gravitational field?
  • Workout
  • · Replies 5 ·
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5
Discovering the Sun's Mass: Calculating Without AU Distance | Wikipedia Method
  • bionioncle
  • · Replies 7 ·
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7
Beam bending, overhang with 2 concentrated loads
  • SolMech
  • · Replies 5 ·
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5
Problems with Critical Damping and Underdamping
  • NewtonsHead
  • · Replies 1 ·
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1
Finding acceleration using static/kinetic friction, mass & applied force?
  • emall16
  • · Replies 1 ·
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1
I have got a lab on 'Braking distance of a wooden block'?
  • Bharat_prakash
  • · Replies 4 ·
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4
Q) What is the final temperature of the compressed air in degrees Celsius?
  • Azareus
  • · Replies 2 ·
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Finding Final Temperature of Boiling Water and Potatoes
  • erok81
  • · Replies 5 ·
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5
Relativity and Lorentz Transformations
  • mhz
  • · Replies 1 ·
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1
Dr Evil( Straight line motion)
  • Toranc3
  • · Replies 4 ·
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4
Master the FBD Technique: Superhero & Sidekick Hanging on a Rope
  • cmkc109
  • · Replies 3 ·
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3
What Does the Area Under a Force vs Time Graph Represent?
  • Tylemaker
  • · Replies 1 ·
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1
How long after the second ball is thrown do the two balls pass each other?
  • Toranc3
  • · Replies 2 ·
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2
Confusion on wording of a dimension problem
  • camillevoll
  • · Replies 5 ·
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5
What is the acceleration due to gravity?
  • adrianagisela_
  • · Replies 1 ·
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1
Can Electrons Really Conduct Heat?
  • quantumfoam
  • · Replies 12 ·
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12
Scaling up a test cannon to a life sized cannon
  • FredGirl13
  • · Replies 1 ·
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1
How Do You Determine if a Meteoroid Has an Open Orbit?
  • Workout
  • · Replies 9 ·
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9
What is the net pressure force on a pressurized jumbo jet flying at 10 km?
  • Von Neumann
  • · Replies 22 ·
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22
Two line charges lie in the XY plane
  • weresquid
  • · Replies 3 ·
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3
Calculating Average Speed of a Baseball in Horizontal Projectile Motion
  • momoskittles
  • · Replies 1 ·
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1
Help Solve 2012 F=ma Problem 21
  • ksrivatsan
  • · Replies 2 ·
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2
Free-falling Weight and Newtons: A Physics Question for Kids
  • Clangador
  • · Replies 6 ·
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6
Calculating Car Acceleration: Kinematic Equations
  • helpme2012
  • · Replies 3 ·
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3
Projectile Motion: Finding the Angle of Launch
  • helpme2012
  • · Replies 10 ·
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10
Kinematics of Constant acceleration word problem
  • pistolpete333
  • · Replies 3 ·
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3
Relativity: A bus with a vertical windshield
  • itssmee
  • · Replies 3 ·
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3
Question on considering final velocity
  • baird.lindsay
  • · Replies 3 ·
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3
Most probable speed of Aluminium
  • rashi
  • · Replies 8 ·
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8
Solving for Acceleration when weight is in Newtons instead of Kg
  • tommyboy2
  • · Replies 6 ·
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6
Circuit with two resistances and inductance
  • bznm
  • · Replies 4 ·
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4
How would you solve this physics problem on relativity and the doppler effect?
  • amr55533
  • · Replies 2 ·
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2
Can I reverse the PdV integral for work?
  • Hercuflea
  • · Replies 1 ·
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1
Two Rotational Dynamics Problem
  • morrisj753
  • · Replies 1 ·
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1
A Uniform Beam Supported by a Cable
  • ginza88
  • · Replies 1 ·
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1
Sketch of an interatomic potential
  • CAF123
  • · Replies 8 ·
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8
How Do You Analyze Acceleration on a Position vs. Time Graph?
  • omc1
  • · Replies 15 ·
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15
Newton's second law - jumping from a height
  • eternalronin
  • · Replies 7 ·
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7
Capacitor Series Circuit: Deriving Cs Relationship
  • maulucci
  • · Replies 9 ·
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9
Help with a conservation of momentum problem
  • tommyboy2
  • · Replies 2 ·
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2
Mechanics - marble rolling in dish
  • micromass
  • · Replies 29 ·
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29
Latent Heat and conservation of energy
  • rico22
  • · Replies 6 ·
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6
The First Law of Thermodynamics
  • rico22
  • · Replies 2 ·
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2
Calculate the kinetic energy of an electron with a wavelength of 1fm
  • richyw
  • · Replies 1 ·
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1
Find effective resistance using kirchoff's laws
  • brushman
  • · Replies 4 ·
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4
Tension: 2 wires one at 60degrees one at 45degrees
  • zeshkani1985
  • · Replies 10 ·
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10
Electric field at a distance from a charged disk
  • kb1408
  • · Replies 11 ·
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11