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.
Solve Spring Mass Change Problem: Find Distance for 4kg Mass
  • Jamboree
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3
How Fast Does a Bowling Ball Travel When It Falls Off a Table?
  • Michael17
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How many of C8H8's electrons has it gained/lost?
  • mono_ten
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Change in Velocity: Find Solution and Reasoning
  • yowatup
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5
Block held against a spring going up a frictionless plane
  • TaxiDriver113
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3
Lose weight (mass) or train? - effect of losing weight (mass) on power
  • Byrne
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Find the coefficient of kinetic friction?
  • kadavis2010
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4
Kinetic Energy: What am I doing wrong?
  • kadavis2010
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4
Electric fields and equipotentials
  • dasblack
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Elastic Potential Energy problem
  • kadavis2010
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3
Elastic Potential Energy Physics Problem
  • chops369
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4
What is the heat capacity of the tires of the car?
  • aps0324
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3
Solve for the amount of force on an 8kg ball
  • gigglin_horse
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6
Find Tension & Force Exerted by Shinbones on Foot w/ W, a, & b
  • Stratosphere
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4
Table tennis and air resistance
  • Michael17
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3
Would be AWESOME if someone could help with this
  • wayneinsane
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1
How do you change a base directly without using base 10 or base 2?
  • elcotufa
  • · Replies 3 ·
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3
Radius of core, using densities
  • bocobuff
  • · Replies 3 ·
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3
Fraction of a 100kg Cube's Volume Floating in Fluid | Uniform Density
  • jan2905
  • · Replies 1 ·
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1
Significant figures in one of the Sears and Zemansky book problems?
  • FountainDew
  • · Replies 2 ·
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2
Electromagnetism and Polarisation question
  • jazznaz
  • · Replies 3 ·
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3
Epotential of Point Charges - Really Hard Conceptual Problem
  • miguzi
  • · Replies 14 ·
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14
Astrophysics - Apparent Magnitude of stars in a close binary system
  • goldilocks
  • · Replies 1 ·
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1
Speed at 5 Seconds on Linear Plot with Slope 5.0 m/s2
  • fatmike6305
  • · Replies 1 ·
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1
How Is the Mass of a Hollow Sphere Calculated in Water?
  • dnp33
  • · Replies 3 ·
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3
Work Done by moving point charge
  • DANIELLYMA
  • · Replies 3 ·
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3
Laser Pointer Wave Energy and eyes seeing
  • TFM
  • · Replies 12 ·
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12
How do different track shapes affect the travel time of a mass?
  • jan2905
  • · Replies 1 ·
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1
Resistance and Power Probelm (again)
  • johnson.3131
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1
Mastering Physics Vector Question
  • fishguts
  • · Replies 3 ·
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3
Questin about moving an object through liquid
  • kevinf
  • · Replies 4 ·
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4
The Oscillation Period of A Rod Pivoted at One End
  • Beginner@Phys
  • · Replies 4 ·
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4
How to Calculate Power and Energy Usage in Electrical Devices
  • johnson.3131
  • · Replies 2 ·
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2
Maximum particle displacement in a sonic boom wave
  • markmai86
  • · Replies 6 ·
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6
Specific Gravity, weight and acceleration
  • jan2905
  • · Replies 6 ·
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6
Special relativity - velocity additions/energy
  • hadroneater
  • · Replies 4 ·
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4
How Fast is a Golf Ball Traveling 10m After Being Dropped from a Cliff?
  • Michael17
  • · Replies 3 ·
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3
How Do You Apply Kirchhoff's Rules to a Series Circuit with Multiple Resistors?
  • Elbobo
  • · Replies 1 ·
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1
Problem 3.62, Young and Freedman-On the Flying Trapeze
  • james brug
  • · Replies 1 ·
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Velocity of 1-dimensional projectile
  • notReallyHere
  • · Replies 1 ·
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1
Destructive interference of direct and reflected rays
  • adelianne
  • · Replies 1 ·
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1
Excess Electricial Charge Fraction
  • perfection256
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What is the Net Electric Field Vector at a Point Due to Two Charges?
  • perfection256
  • · Replies 2 ·
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2
Velocity When a Runner Covers Half a Lap
  • Bottomsouth
  • · Replies 7 ·
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7
Calculating net force on a charge placed at a spot
  • phys62
  • · Replies 1 ·
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1
How Do You Calculate the Mass of a Block from a Bullet and Spring Collision?
  • blindsided
  • · Replies 1 ·
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1
Understanding Fluid Resistance and Drag Forces in Swimming and Tug of War
  • ritwik06
  • · Replies 7 ·
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7
What is the total resistance in the given circuit?
  • Gregg
  • · Replies 1 ·
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1
Finding Equilibrium: Solving for Net Gravitational Force on a Mass
  • moaath
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Finding final velocity in a perfectly elastic collision
  • ilovedeathcab
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Olympic Class Runner: Race Time & Acceleration
  • grimsdale
  • · Replies 5 ·
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5
Electric Field and two point particles
  • fallen186
  • · Replies 1 ·
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Calculating Maximum Height of a Rocket in Free Fall
  • Bottomsouth
  • · Replies 4 ·
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4
Golf Ball Problem-elastic collision
  • ihatephysics7
  • · Replies 1 ·
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Blocks, a spring, and a collision
  • ~christina~
  • · Replies 15 ·
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15
Conservation of energy/ efficiency question.
  • maccha
  • · Replies 7 ·
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Solve Flying Trapeze: Texas Tumblers Puzzle
  • scorpa
  • · Replies 21 ·
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21
How Does a Gardner Shower Jet's Range Impact the Wall's Wetted Area?
  • succhi
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Solving a 2-Mass System Connected by a Rope
  • raptik
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How Is the Third Piece's Velocity Determined After a Grenade Explosion?
  • tornzaer
  • · Replies 3 ·
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How Do You Calculate Displacement and Distance in Physics Problems?
  • aspen1234
  • · Replies 3 ·
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3
Is this easy charge problem correct?
  • fallen186
  • · Replies 1 ·
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Bournalli's Equation homework problem
  • jan2905
  • · Replies 4 ·
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4
Calculating Braking Force for a 3000 lb Car
  • NYCHE89
  • · Replies 3 ·
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The Electric Field Due to a Charged Disk
  • brcole
  • · Replies 1 ·
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Finding the radius of a brass ball using tension?
  • rought
  • · Replies 9 ·
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9
Help with Displacement ( Vectors)
  • ipwnj00
  • · Replies 5 ·
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5
Cracking Nuts with Pliers: Estimating Hand Force Needed
  • Stratosphere
  • · Replies 6 ·
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6
Help with Circuit Homework: VAB=125V, R1=17.0, R2=84.0, R3=24.0
  • dgoudie
  • · Replies 6 ·
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6
Linear Expansion related to area expansion
  • student 1
  • · Replies 4 ·
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4
Vector Addition Using Components
  • Turquoise
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What is the mechanical advantage calculation for cracking a nut with pliers?
  • Stratosphere
  • · Replies 6 ·
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Calculate power with v on inclined plane with miu
  • sciencescienc
  • · Replies 7 ·
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7
Calculating Maximum Torque to Loosen Stuck RV Bolt
  • Stratosphere
  • · Replies 22 ·
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DC Circuit Diagram Help: Understanding Parallel and Series Resistors
  • Elbobo
  • · Replies 2 ·
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2
Why Does Using High Voltages in Power Transmission Reduce Losses?
  • paul_harris77
  • · Replies 1 ·
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What Weight Should Be Hung at Point P for Horizontal String?
  • ritwik06
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Do Normal Forces Always Exist When Surfaces are in Contact?
  • ritwik06
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Solving Gas Pressure Law: 4.5*10^5Pa to 1*10^5Pa
  • BadlyAddicted
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Do Balls Thrown Up and Dropped Down Meet Above the Halfway Point of a Building?
  • UMich1344
  • · Replies 1 ·
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Calculating the Force on a Falling Chain: Solving a Momentum Problem
  • cordyceps
  • · Replies 6 ·
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Is it possible to find the answer?
  • phys1618
  • · Replies 1 ·
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1
How can I find the acceleration and tension in a block and pulley system?
  • vpv
  • · Replies 10 ·
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Which electric field is larger?
  • -EquinoX-
  • · Replies 2 ·
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One-dimensional lattice (electrostatics)
  • asi123
  • · Replies 4 ·
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Watermelon and Superman experiment
  • BMWPower06
  • · Replies 1 ·
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Help The Density Force Area type problem.?
  • kurosaki_ichi
  • · Replies 15 ·
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Calculating Electric Fields Using Coulomb's Law
  • AbbyGirl
  • · Replies 2 ·
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Calculating Normal and Frictional Forces on a Parked Car on an Inclined Road
  • luap12
  • · Replies 2 ·
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How Do You Square Cosine B?
  • chemic_23
  • · Replies 4 ·
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Find out the number of batteries needed to power 5 devices of 12V for 18 hours
  • jesschin
  • · Replies 3 ·
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3
An electron moving across capacitor problem
  • KillerZ
  • · Replies 3 ·
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3
Electric Fields, Finding the zero field point
  • Oblivion77
  • · Replies 11 ·
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Kite string force, negative or positive>
  • 2clients
  • · Replies 1 ·
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1
Friction, Forces, Coefficient of Friction (True/False) Simple
  • FAJISTE
  • · Replies 2 ·
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Calculating Work Required to Move a Point Charge of +8μC from (0,4m) to (3m,0)
  • jan2905
  • · Replies 9 ·
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Angular velocity- pendulums and ideal springs
  • chantalprince
  • · Replies 4 ·
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4
Calculating the magnitude of the net force bewteen charges
  • thrills4ever
  • · Replies 5 ·
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Gauss's Law and charge distribution
  • KillerZ
  • · Replies 3 ·
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3
Solve the Ball Collision Problem: Angle α and Friction!
  • Copycat91
  • · Replies 4 ·
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4