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.
Physics (Net Forces/Newton's laws)
  • austin1250
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Rotational Inertia of a Ball-Rod system
  • Dtails
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2
How Does Constant Power Affect Truck Acceleration and Position?
  • nns91
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1
How Is Tension Calculated in a Moored Dirigible's Support Wires?
  • emoseman
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7
What Is the Final Temperature After Dropping Hot Coins into Cooler Water?
  • jcwhitts
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3
How Do You Determine Forces in a Truss Structure?
  • rikka22
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1
How Do Principles of Flight Apply in Real-Life Aviation Scenarios?
  • jasperhoopman
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1
How to Calculate Strain and Dimensional Changes in Complex Loading Systems
  • smiffy66
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3
Elastic Collision of Two Objects (2D)
  • Hermit Solmu
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5
Height, angles, and projectiles
  • FrenchAtticus
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1
Circular Motion force problem?
  • glindawantsme
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1
How Can I Solve Complex Electrostatics Problems?
  • xezer90
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1
Physics Problem: Minimum Bike Speed to Clear a 2.5m Ditch
  • TITO09
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1
Magnetic force on wires -direction of B
  • bcjochim07
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3
Elastic Collision: Solving for Delta x
  • rugbygirl2
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1
Momentum and Kinetic Energy problem
  • BuddyGoodness
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1
Coefficient of friction of a spring
  • reaperkid
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1
Conservation of Energy Problem involving a spring
  • myoplex11
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1
Horizontal Force on Pivot Point
  • Epif
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1
Transverse Sinusoidal Wave Function
  • wellejj
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1
Rotational Dynamics: Solve Problem & Get Help
  • boberth2o
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1
Bungee Jumping (Finding distance and spring constant)
  • jheld
  • · Replies 8 ·
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8
Mechanics of a Sliding Box: Calculating Kinetic Energy, Net Force, and Work Done
  • dbb2112
  • · Replies 27 ·
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27
Compensating for Gravity in Archery: Finding the Correct Aim Point
  • halo9909
  • · Replies 5 ·
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5
How Fast Was the Steel Ball Rolling?
  • halo9909
  • · Replies 1 ·
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1
Question about the Heisenberg Uncertainty Principle
  • MrDMD83
  • · Replies 2 ·
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2
Box Mechanics: Solving for Speed, Energy, Force, and Work
  • dbb2112
  • · Replies 20 ·
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20
Energy and momentum - pendulums
  • FrenchAtticus
  • · Replies 1 ·
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1
Total energy of a rolling sphere
  • pucr
  • · Replies 2 ·
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2
Speed acceleration equation help
  • halo9909
  • · Replies 1 ·
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1
How do virtual and real objects affect the image formed by multiple lenses?
  • Gear300
  • · Replies 18 ·
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18
Solving for Height and Distance: Janet's Displacement Speed Calculation
  • halo9909
  • · Replies 1 ·
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1
Calculating Kinetic Energy & Speed of a Thrown Yo-Yo: Physics Problem Help
  • matt62010
  • · Replies 1 ·
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1
Finding the pan's distance from the ceiling
  • jheld
  • · Replies 14 ·
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14
High school physics basic question about two dimensional motion (WITH PICTURE)
  • lanvin
  • · Replies 2 ·
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2
Gravitation (Preliminary Reference Earth Model)
  • ceomtcl
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2
How Can I Find the Center of Gravity for a Uniformly Distributed Mass?
  • bmandrade
  • · Replies 1 ·
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1
How to Calculate Maximum Jump Height with Given Variables
  • FrenchAtticus
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2
Gravitational Acceleration inside a Planet
  • Superfluous
  • · Replies 6 ·
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6
Meteor Entering Orbit of a Sun (cons. energy & momentum) [very hard algebra]
  • DD31
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2
Quick error propagation problem
  • mjolnir80
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2
Where should mass B be placed for rotational equilibrium?
  • bmandrade
  • · Replies 11 ·
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11
Conservation of Angular Momentum
  • lmc489
  • · Replies 1 ·
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1
Calculating Young's Modulus for a Wire
  • JJones_86
  • · Replies 3 ·
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3
Conceptual question on simple harmonic motion
  • xregina12
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3
Calculate the translational speed of a cylinder
  • Bones
  • · Replies 6 ·
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6
Another torque question (no math)
  • xlaserx7
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2
What is the difference in lever arms between two people on a seesaw?
  • xlaserx7
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1
Finding Velocity of a ball hitting a ball hanging from a string
  • jheld
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2
Thermo - mixing water in a container.
  • Thyferra2680
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1
Calculating Work for Satellite Orbits Around Earth
  • cobrasny
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3
Centre of mass and translational motion
  • godwinscareer
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3
Rate of Change of the Angle of Elevation
  • pippintook
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1
Power of a Transverse wave question
  • ultrapowerpie
  • · Replies 20 ·
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20
How Far Can a Coin Be Placed on a Rotating Record Without Slipping?
  • pucr
  • · Replies 3 ·
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3
Question concerning Michelson stellar interferometer
  • arrektor
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2
What is an inertial frame of reference?
  • alpha372
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3
Calculating Moment of Inertia for Rigid Bodies | Physics Help Needed
  • fluidistic
  • · Replies 4 ·
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4
Calculate Work Done by Gravity: Physics Homework Problem
  • reaperkid
  • · Replies 5 ·
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5
Angular Momentum Problem formula
  • blue-steel
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2
Help with adding vectors with component method (sin/cos/tan)
  • amd123
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2
Formula One Relating to the Combined Gas Law
  • heggs954
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1
I got a general question(not a math problem)
  • xlaserx7
  • · Replies 4 ·
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4
Dispersion through an equilateral prism
  • SteveM-
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2
Verifying the Accuracy of a Gun Aimed at a Falling Target
  • TITO09
  • · Replies 3 ·
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3
How to find angular acceleration
  • itsmarasilly
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A simple yet tricky pendulum problem
  • Mr.P
  • · Replies 4 ·
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4
Energy in a vertical spring mass system
  • S.A
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2
Calculating Power Output of a Weightlifter
  • lonlyincolleg
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2
What is the final velocity of mass
  • Inertialforce
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1
Pleaseeeeeeeeeee i need this exammmmm
  • lmohamed2008
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2
Finding Reactionary Forces on a Beam with Distributed Load
  • koolsid
  • · Replies 7 ·
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7
2D momentum ( in understanding, but have the answer)
  • Elbobo
  • · Replies 4 ·
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4
Bragg Scattering - Need help because it is hard for me.
  • getcarter
  • · Replies 1 ·
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1
Bowling Ball Slipping and Rolling: Analyzing Acceleration
  • jnimagine
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1
How Does Self Inductance Affect Current Over Time in an R-L Circuit?
  • TFM
  • · Replies 18 ·
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18
Calculating Force and Acceleration in Circular Motion Problem
  • phys1618
  • · Replies 3 ·
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3
Nuclear reaction/binding energy problem? Year 11 physics, so its fairly simple.
  • caitie_72
  • · Replies 1 ·
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1
Terminal Velocity and Resistive Forces problem
  • cheese825
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1
Inductance & magnetic flux problem -
  • bcjochim07
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2
How do i find the radius of this path
  • devanlevin
  • · Replies 14 ·
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14
Please check my acceleration hockey answer.
  • cbrowne
  • · Replies 13 ·
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13
Finding a common angular velocity
  • lmc489
  • · Replies 3 ·
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3
How Do You Calculate Tire Pressure Without a Gauge?
  • Jeff231
  • · Replies 1 ·
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1
What is the power input at time t=3s for the force of 5N on an 8kg object?
  • nns91
  • · Replies 5 ·
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5
Sig Figs: Calculating Answers to 1 & 2
  • chemic_23
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3
How Much Energy Is Required to Launch a Satellite into Orbit?
  • crr2010
  • · Replies 3 ·
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3
Carnot engine efficiency and exhaust problem
  • lzh
  • · Replies 2 ·
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2
How Does Gravity Affect the Maximum Height of a Thrown Ball?
  • needhelp?
  • · Replies 1 ·
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1
How Do You Calculate Speed at the Bottom of a Hill Considering Friction?
  • lonlyincolleg
  • · Replies 3 ·
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3
Intensity of Near-Infrared Spectroscopy Laser
  • creative_wind
  • · Replies 7 ·
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7
Find the period of the resulting swings of this pendulum
  • anubis01
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2
Error Propagation: Calculating Puck's X-Velocity
  • asleight
  • · Replies 3 ·
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3
What Determines the Dynamics of a Sled on a Frictionless Hemispherical Hill?
  • XJellieBX
  • · Replies 1 ·
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How far does the car travel before stopping?
  • collegegirl
  • · Replies 1 ·
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Coefficient of static friction of crate
  • collegegirl
  • · Replies 3 ·
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3
Bowling Question - Rotational Motion
  • gingerelle
  • · Replies 1 ·
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1
Max Mass for Equilibrium Problem Homework
  • bluejay1
  • · Replies 3 ·
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3
Earth's Elliptical Path: Acceleration Direction Explained
  • alexmahone
  • · Replies 3 ·
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3
Period of uniform plank with spring not at Center of Mass
  • ultrapowerpie
  • · Replies 7 ·
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7