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.
What is the Total Force Exerted on Block 3 by Block 2?
  • Juntao
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Uniform Circular Motion-Centripetal Force
  • PianoMan
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2
Solve for wInertia Confusion: Calculating Speed of a Merry-Go-Round
  • tucky
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4
Finding the Parametric Equations of a Line (0,4) & Alpha 60°; Beta 30°, 150°
  • PiRsq
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Rotational motion of a washing machine
  • tucky
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2
How much paint is needed for a larger, signal-reflecting weather balloon?
  • mary d
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2
Speed of electron after collision with Photon
  • dcl
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2
How to Graph y = 9/x² Without a Calculator?
  • Integral0
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2
How Much Force is Needed to Move a Box with a Rope at an Angle?
  • missrikku
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Solve Math Problems: Get Help for Last 2
  • Nanabit
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6
Calculating Mass of Equal-Mass Binary Star System
  • liljediboi
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6
Calculate the velocity vector as a function of time
  • Tony Zalles
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2
How Accurate Are These Chemistry Calculation Methods?
  • ConfusedStudent
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2
Solving for an Unknown Mass Using Hooke's Law and Simple Materials
  • daodude1987
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3
Equilibrium temperature as function of latitude
  • StephenPrivitera
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2
A race car traveling at +44 m/s
  • Integral0
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2
How do Tension Forces and Pulleys Work?
  • lurch0038
  • · Replies 13 ·
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13
Conservative and nonconservative potential energy
  • Nanabit
  • · Replies 5 ·
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5
Tension Strongman problem from Physics
  • havechanged
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2
When water waves travel from a deep region
  • Hyperreality
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2
How Long Does It Take a Bullet to Stop Inside a Tree?
  • Nanabit
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2
What is the charging current for a 120 ampere-hour storage battery?
  • da-outcast
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Banked curve, car, friction problem
  • groundknifer
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2
How Far Apart Will the Cheetah and Antelope Be After 17 Seconds?
  • Skyblitz
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5
Help with a hydrodynamics problem
  • MisterNi
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3
Two-Dimensional Kinematics: Ball on a string
  • Rockdog
  • · Replies 10 ·
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10
Solving Two Concurrent Vectors: Find G's Angle
  • ccb056
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6
Projectile Questions: Calculate Velocity and Height of Golf Ball | Help Needed
  • mcintyre_ie
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3
Find two unit vectors that are parallel to the xy plane
  • PiRsq
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2
What Minimum Speed Must an Arrow Have to Pass Through a Spinning Wheel?
  • Moxin
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2
2 simple Physics q's driving me nuts
  • kangta
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4
Swimmer in river relative motion crap
  • rdn98
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3
What's the Time for One Complete Revolution on a Hanging Swing Ride?
  • robdawg
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3
Solving Kinematics Problems in 2D: Get Help Now!
  • Mesmer17
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2
Does the following matrix have an inverse?
  • frankR
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3
Collision Problem using Conservation of Momentum and Energy
  • Moxin
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4
Solving Forces and Acceleration Problems in Physics - Study Group Help
  • caity232
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4
Does the Hockey Puck Reach the Hole on an Inclined Ramp?
  • evelynn33
  • · Replies 4 ·
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4
Static Friction: Finding F_min for Box on Board
  • Spectre32
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2
Proof Using Def. of Groups and Def. of Subgroups
  • wubie
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3
Help With Centripetal Acceleration *
  • nychic3000
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2
Defining Groups: Proving Abelian Property
  • wubie
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Is This PV Diagram Calculation Correct?
  • zaf
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2
What are the physics problems involving velocity and acceleration?
  • meteoguy04
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4
How do you calculate mass yield of a solution?
  • Cod
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2
Understanding Groups in Algebra: A Question of Closure and Inverses
  • wubie
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3
Solving Incline Forces: Acceleration, Tension, and Speed Calculations
  • Valerie
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2
Newtons Theory question - 911 - help exam tommorow
  • quarkboy
  • · Replies 4 ·
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4
Problem check please (projectile motion)
  • confused
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2
Force and Newton's laws (airbag)
  • missrikku
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2
What are the top US universities for studying physics?
  • < Ali >
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6
Solve Two Pulley System w/ Masses m1, m2, & m3
  • StephenPrivitera
  • · Replies 14 ·
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Easy Vertical Motion Question
  • Inquiring_Mike
  • · Replies 4 ·
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4
Newton's Laws homework questions
  • Nanabit
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4
What is the energy lost due to friction?
  • tristan_fc
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Temp diff in Greenland and Iceland
  • photon
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Sail Boat Race Trigonometry, just stuck on first part
  • Juntao
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The problem about tension forces
  • barbieprincess87
  • · Replies 15 ·
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Uniform circular motion - airplane
  • missrikku
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3
Why Does Height Affect Calculations in a Block's Kinetic Energy Problem?
  • Physicsit
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2
Spring Constants: Solving Sliding Block Problem
  • Nanabit
  • · Replies 6 ·
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6
Poisson stats: signal to noise
  • StephenPrivitera
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3
How Does a Pendulum Reveal Bus Acceleration in Different Reference Frames?
  • StephenPrivitera
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2
How Far Does Bob Plunge and What is the Maximum Force on the Bungee Cord?
  • Snikt
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It's that time again: Help by tonight
  • NINHARDCOREFAN
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Help with Acc Linear Motion: Part 1 & 2, Part B: Prove u > 9.8
  • mcintyre_ie
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Question regarding tension and friction
  • tristan_fc
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3
How is Capacitance, Resistance and Time to fully charge related?
  • Sociopath^e
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2
Why Am I Getting the Wrong Answers for My Physics Problems?
  • NINHARDCOREFAN
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What is the acceleration of a box on a 20 degree inclined plane?
  • fish
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Solving Graphs of All Nature | Velocity, Accerleration & Force
  • Spectre32
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If a rock is dropped off of a sea cliff
  • kbrowne29
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Why Does the Ball Thrown Upward Return to the Man in 2 Seconds?
  • rdn98
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John & Julia's Ages: Solving the Mystery
  • Jeebus
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3
Finding the Inductance of a coil
  • discoverer02
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2
Geometry Help: Solving Common Questions for Students - Get Assistance Now!
  • rahul_rudani
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2
How High Was the Girl When She Released the Rope?
  • Mesmer17
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Max Velocity on Elevated Curve: Solving for Mu_s
  • Spectre32
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3
Why Does the Book Say the Final Direction is SW When Moving From North to West?
  • Kinto
  • · Replies 9 ·
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9
Determine the acceleration of rope hoist
  • gameguru
  • · Replies 5 ·
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5
Solving a Force Problem: Finding the Angle of a Hanging Object
  • Flaming Toilet
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3
Finding Initial Velocity of a Ball Using Time and Distance
  • thegreatone09
  • · Replies 3 ·
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3
Integrating 1 over root x times root x plus 1 - A Guide
  • Khan
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4
Find p Given a.b = 4, a=[6,3,-2], b=[-2,p,-4]
  • PiRsq
  • · Replies 10 ·
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10
Help Solve Golf Launch Speed Problem w/o Initial Velocity or Time
  • ConfusedStudent
  • · Replies 5 ·
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5
Solving Complex If/Then Statements
  • qwpoi
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2
How High Does a Rocket Go in a Physics Experiment?
  • Rockdog
  • · Replies 4 ·
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4
A sledge loaded with bricks has a total mass of 18.0 kg
  • imaqueen
  • · Replies 3 ·
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3
Relative motion of an elevator question
  • missrikku
  • · Replies 3 ·
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3
Solving a Ramp Problem with 1kg Block
  • Inquiring_Mike
  • · Replies 3 ·
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3
Understanding Tension Force in a System of Connected Masses
  • missrikku
  • · Replies 3 ·
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3
Projectile motion of a salmon jump
  • Gunk
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What is the minium force required to pull block C out from under block B?
  • tucky
  • · Replies 3 ·
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SIMPLE force of friction question
  • helix
  • · Replies 2 ·
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Projectile motion and gravitational acceleration problem
  • imhereyeah
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Highway Patrol - Argh, looks so simple
  • Rockdog
  • · Replies 4 ·
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4
Jack's River Race: Solving the Shortest Path Problem
  • Matthew
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3
Acceleration of an object is always directed perpendicular to its velocity
  • pringless
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3
Prove some laws of sequencing limits
  • fangtu
  • · Replies 9 ·
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9
Undergrad nuclear physics; spin parity rules
  • grady
  • · Replies 3 ·
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3