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.
Satellite Slingshot manoeuvre question
  • Crosshash
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Uniform Circular Motion Question
  • Gigabytes
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Calculating Acceleration with Force and Mass
  • saychanh
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Newton's Second Law-Pulley problem
  • Precursor
  • · Replies 11 ·
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Understanding Angular Momentum Conservation
  • mathdude88
  • · Replies 8 ·
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8
Constant Acceleration - Kinematics Problem Help
  • dd12
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3
Moment of inertia flywheel mass problem
  • bowma166
  • · Replies 7 ·
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7
Electrical Circuits: Recharging a Battery
  • dimpledur
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6
Where does this energy come from?
  • cali_sk8er205
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Rotation problem: which would stop first?
  • Misako
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2
Projectile Motion in Elevator: Peach Pit Launch Homework
  • halo9909
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3
Definition of electric field dE due to a small charge dQ
  • twotaileddemon
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Projectile time left in basketball
  • halo9909
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3
The lowest centre of mass while filling a cup of water?
  • Aihara
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3
Calculating work done on a truck by friction when a truck is pushing a car
  • kristy hardy
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4
Calculating Average Force in a Car Collision
  • ScullyX51
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2
How Loud Is a Whisper at 3.5 Meters?
  • kristibella
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1
Can Physics Equations Help Solve Real-Life Motion Problems?
  • Tim P
  • · Replies 6 ·
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6
What is the average acceleration?
  • InSpiRatioNy
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Circular and simple harmonic motion
  • AcidicVision
  • · Replies 5 ·
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5
What Are the Units of Constants c and Fo in the Equation Fv = Fo * sin(cx)?
  • theneedtoknow
  • · Replies 6 ·
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6
Traverse E wave travel Time on wires
  • Husker70
  • · Replies 1 ·
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1
Collision of particles (relativity)
  • Frillth
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1
Is Work Path Dependent with a Zero Total Displacement?
  • fiziksfun
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Solve Raindrop Problem: Determine Time to Reach 63% Terminal Velocity
  • siwik39
  • · Replies 2 ·
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2
Acceleration, Velocity and distance
  • Oblivion77
  • · Replies 5 ·
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5
Identifying 2 Elements in an AC Circuit: R & L
  • zakaqel
  • · Replies 2 ·
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2
Heavy Pulley / Conservation of Mechanical Energy
  • danrochester
  • · Replies 4 ·
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4
Difference between Newton's first and second law
  • alpha372
  • · Replies 4 ·
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4
Magnetic Flux, Equator and flying bullets
  • TFM
  • · Replies 10 ·
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10
Deriving an equation for displacement and acceleration (given velocity)
  • southernbelle
  • · Replies 5 ·
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5
How Does Force Affect Velocity in a One-Dimensional System?
  • brittkub1291
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1
How Does Buoyancy Affect a Bubble's Force as It Sinks?
  • Tom59593
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1
How to Calculate Kinetic Energy Relative to Center of Mass?
  • lebprince
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Circuit/Mechanical oscillator analogy
  • jdstokes
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1
Torque on Supply Reel in Cassette Deck Playback
  • xlaserx7
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How Does Torque Affect Foot Bones?
  • davidjkuhr
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What Is the Velocity of the 3 kg Fragment After Explosion?
  • blayman5
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How Does Torque Relate to Different Types of Acceleration?
  • saltine
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Circular motion vector problem
  • devanlevin
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Self Inductance of a Coil: Why Not 1/2?
  • jaejoon89
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What Are the True Statements About Tension in a Simple Pendulum?
  • lmlgrey
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Centripetal Force, very simple.
  • nothing4me
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Net External Force in a Direction
  • Smiley.Teddy
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How Can Angular Momentum Principles Solve Ice Skater and Rotating Disk Problems?
  • jcumby
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A few questions relating to the cross product
  • Spiffy
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Rate magnitude of vertical component
  • hulahoop09
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I need to to find the moment of inertia for the system
  • afcwestwarrior
  • · Replies 1 ·
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Completely Inelastic Collision Question
  • Inertialforce
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Specific Latent Heat of Fusion problem
  • 9giddjl
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Spring problem-perpendicular force
  • racast5
  • · Replies 7 ·
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7
Work done by a Spring Force question
  • brittkub1291
  • · Replies 17 ·
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17
Rotational Kinematics - Cylinder down a slope.
  • CaptainSFS
  • · Replies 4 ·
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4
Calculating the voltage over a resistance with and without voltmetre
  • OldSnake
  • · Replies 4 ·
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Conceptual problem: Finding gravitational KE
  • grantP
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Quick general question about induction problem
  • bcjochim07
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How many rocks/min to mantain a constant speed
  • tironci
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Help with a physics TEST (im desperate)
  • Killvenom
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Why do Satellites Orbit Earth at the Equator?
  • phys1618
  • · Replies 5 ·
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What Causes the Difference Between Calculated and Experimental Acceleration?
  • Ninjarzz
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Help with Forces - Get Answers & Diagrams for Net Force, Friction, Inclines
  • austin1250
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Concentric Circles & Magnetic fields
  • MikeSSSS
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Calculating Helium Vrms and Average KE at 5K
  • mastiffcacher
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What is the scale reading when the block starts to slide down the incline?
  • mjolnir80
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DeLorean Acceleration in Back to the Future III
  • Smeagol3
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Solve the Difference in Calculated and Experimental Acceleration
  • Ninjarzz
  • · Replies 1 ·
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Surface charge induced in conductor by point charge
  • jdstokes
  • · Replies 17 ·
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17
Solving a Puzzling Physics Problem: Pushing a Square Box
  • ruggler
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8
How Is Work Calculated in a Point-Particle System for a Sprinting Runner?
  • lebprince
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Newton's Law's Problem (Contact Force)
  • certainlynot5
  • · Replies 5 ·
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Potential Difference Across Resistor (RC Circuit)?
  • grouchy
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How Is Net Torque Calculated on a Rotating Sphere?
  • mathdude88
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How Long Does Sound Travel Through Water and Copper?
  • madd_bm
  • · Replies 2 ·
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Nuclear physics and radio activity
  • venky78666
  • · Replies 1 ·
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HELP Rotational kinetic energy problem
  • Kudo Shinichi
  • · Replies 5 ·
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Finding velocity given change in potential
  • Xender
  • · Replies 2 ·
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Moment of inertia - disk - finding dm
  • O011235813
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2
How Do You Calculate the Correct Resistor Values for a Simple Voltage Regulator?
  • bengaltiger14
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Linear Speed of a rigid rotating object
  • mathdude88
  • · Replies 1 ·
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How Does Newton's Third Law Apply in a Frictionless Two-Block System?
  • ScullyX51
  • · Replies 1 ·
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Charge to Mass Ratio difference between Electrons and Protons.
  • sdensmore
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Balancing a cylinder on an incline with a mag. field
  • bcjochim07
  • · Replies 2 ·
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How Do You Solve for tanB in an Elastic Collision Problem?
  • Welshy
  • · Replies 6 ·
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6
How Many Significant Figures for Time and Mass Calculations?
  • helpmedude
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Energy of simple harmonic oscillator
  • clemente
  • · Replies 2 ·
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Finding particle one's final velocity in inelastic collision
  • jheld
  • · Replies 1 ·
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Calculating the net torque help
  • cece
  • · Replies 8 ·
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8
Finding location of nodes and antinodes.
  • blueskadoo42
  • · Replies 15 ·
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Analyzing Friction in a Hanging Mass System
  • darkSun
  • · Replies 5 ·
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How Do You Solve These Basic Physics Problems on Force and Energy?
  • nns91
  • · Replies 9 ·
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How Do You Calculate Sound Intensity and Power from Decibels?
  • dislocated_ta
  • · Replies 1 ·
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Desperate! Circular motion - Acceleration and Velocity Analysis
  • nns91
  • · Replies 10 ·
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Hubbkles Constant and the age of the universe Its not very long apparentely
  • TFM
  • · Replies 7 ·
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7
Calculating Impulse and Force: Physics Homework Help
  • cali_sk8er205
  • · Replies 2 ·
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2
Temperature Change in Adiabatic Process for Ideal Monatomic and Diatomic Gases
  • akan
  • · Replies 4 ·
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Thermodynamics Ideal Gas Problem
  • akan
  • · Replies 2 ·
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How Much Power Does a Car Need to Climb a Hill at 100 km/h?
  • frosti
  • · Replies 3 ·
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How Does Sound Intensity Change with Fewer Firecrackers?
  • Alicek
  • · Replies 1 ·
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Which Scenario Best Reflects a Conservation of Momentum Graph?
  • jeremy smith
  • · Replies 4 ·
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4
Pulley Physics Help: Solve Force to Move Boxes
  • davo
  • · Replies 6 ·
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6