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 Do You Calculate the X-Coordinate of a Particle in Circular Motion?
  • Cate
  • · Replies 9 ·
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3K
Finding original speed / acceleration
  • mrserv0n
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5
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25K
How Do You Calculate the Area of a Submarine Window from Its Diameter?
  • zuN
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4
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5K
Kinematics - How do I apply them to different problems?
  • 07triumphd675
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4
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9K
Trouble calculating the acceleration
  • ERAUin08
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1
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1K
How Does the Fizeau Toothed Wheel Experiment Calculate the Speed of Light?
  • s7b
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1
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3K
What is the relative velocity of a person running on a ship to the shore?
  • veronicak5678
  • · Replies 6 ·
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6
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2K
How Long Can You Avoid a Collision with an Accelerating Dragster?
  • aleferesco
  • · Replies 12 ·
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12
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4K
Which Happens First: Water Spills or Bottom Exposed in a Cylindrical Centrifuge?
  • Doogan1
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2
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3K
Analyzing False Statements about Orbitals
  • a.a
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1
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The Number of Electrons in the l = 2 Subshell for a 35-electron Atom
  • a.a
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Answer: Calculate Average Power Output for 600 kg Top Fuel Drag Racer
  • lpcampbe
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2
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37K
Calculating Horizontal Distance and Time for a Package Ejected from a Plane
  • tater08
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3
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7K
What Angle Does the String Make with the Vertical While Accelerating?
  • ldbaseball16
  • · Replies 5 ·
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5
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6K
Solving Frictionless Plane Incline Problem: A & B
  • Thoven
  • · Replies 3 ·
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3
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8K
Calculating Time for Side-by-Side Cars: Car Kinematics Homework
  • Youngstabullz
  • · Replies 5 ·
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5
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4K
How Do I Calculate Pressure Changes in a Linear Spring System?
  • Saladsamurai
  • · Replies 6 ·
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6
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2K
Need help before quiz today. Kinematics
  • joeth04
  • · Replies 7 ·
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7
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4K
P-V Diagram: Computing Work and Determining Sign of Work
  • Saladsamurai
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2
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4K
Magnitude + direction of block on an incline
  • jspek9
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1
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2K
Electric Field Calculation for Three Charges on a Horizontal Line
  • jaejoon89
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2
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6K
Calculation of Velocity in reference to circular motion
  • Kdoll1
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1
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3K
Find potential energy of system with 3 charges
  • mbmcgee
  • · Replies 7 ·
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7
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13K
Finding Ratios of Forces in a Two-Force System | Homework Question
  • Nivlac2425
  • · Replies 3 ·
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3
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2K
How Much Light Intensity Is Needed to Suspend a Sheet of Paper?
  • lunus
  • · Replies 3 ·
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3
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12K
Can Trigonometry Prove a Dart Always Hits Its Target?
  • LANS
  • · Replies 1 ·
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1
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3K
PLEASE HELP Projectile Motion: Two-dimensional Kinematics
  • Npila1
  • · Replies 4 ·
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4
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4K
Estimate Earth's Radius Using Sun's Disappearance Time
  • crazyforfood
  • · Replies 2 ·
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2
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2K
How Far Away Was the Earthquake if S Waves Arrived 2 Minutes After P Waves?
  • Foxhound101
  • · Replies 9 ·
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9
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13K
Bullet acceleration homework problem
  • kmikias
  • · Replies 1 ·
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1
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3K
Point Charges and Force vector addition
  • beccaka2003
  • · Replies 7 ·
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7
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4K
Dive-bomber projectile motion problem
  • jessedevin
  • · Replies 24 ·
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24
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12K
Centripetal Force (Loop the Loop)
  • Kajayacht
  • · Replies 1 ·
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1
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5K
Is My Calculation for Astronaut's Centripetal Acceleration Correct?
  • BeckyStar678
  • · Replies 1 ·
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1
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2K
Simple Vector Difference Question
  • CoolMan
  • · Replies 1 ·
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1
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6K
How dose an angle of an object effect it's distance/
  • katie<3
  • · Replies 12 ·
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12
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17K
Find the Distance and Sign of Charge Q for F1 = F2
  • Kathi201
  • · Replies 3 ·
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3
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2K
Calculating Relative Motion and Vectors for Moving Cars
  • southernbelle
  • · Replies 6 ·
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6
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3K
How many electrons emerge per second?
  • Ithryndil
  • · Replies 2 ·
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2
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10K
Thermodynamics question 1 (question about mass)
  • Saladsamurai
  • · Replies 1 ·
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1
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2K
Solve Homework Questions: Moon Walk, Slingshot, Ball on String
  • Kaze105
  • · Replies 6 ·
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6
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3K
Rotational Equilibrium Lab Question
  • CLeSure
  • · Replies 3 ·
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3
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3K
Magnitude of Normal Force (Frictionless)
  • Spartan Erik
  • · Replies 6 ·
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6
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5K
Painting hung by a wire suported by two nails
  • SteveM-
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2
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6K
Kinetic Friction Problem (Truck Braking)
  • Spartan Erik
  • · Replies 11 ·
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11
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13K
Getting the average velocity from a parabolic curve
  • theLHC
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4
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16K
Does Flying Across Australia Affect Your Age?
  • fredrick08
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2
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3K
Position of object above the ground.
  • Jacobpm64
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3
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Static/Kinetic Friction Problem
  • Spartan Erik
  • · Replies 6 ·
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Projectile Motion with acceleration phase
  • ionic_scream
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Calculating Distance for Throwing an Egg from a Building
  • veronicak5678
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5K
What Is the Coefficient of Kinetic Friction in This Physics Problem?
  • Spartan Erik
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2K
Projectile Motion Horizontal Displacement Equation
  • ArbazAlam
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2
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Calculate the car's average acceleration
  • Sevenheartz
  • · Replies 3 ·
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3
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6K
Projectile Motion: Finding Time to Change Angle from 31° to 21°
  • randomguy123
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2
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2K
Introducing Ian: Working on an Athletic Training Degree & Stumped by Physics HW
  • ut4ever8
  • · Replies 7 ·
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7
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2K
Juggling Problem: Solving for Time, Speed & Height
  • joeth04
  • · Replies 3 ·
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3
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Farday's Disc - Diameter of Disc
  • tpoulter
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5K
Help with an acceleration and distance problem
  • science_rules
  • · Replies 9 ·
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9
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3K
How Do You Calculate Total Vector Displacement and Average Velocity?
  • -EquinoX-
  • · Replies 4 ·
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4
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Electric fields, distance, and potential difference
  • goWlfpack
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4
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17K
What is the time taken for these 2 cars to meet?
  • nyrychvantel
  • · Replies 2 ·
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2
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3K
What Happens to Torque as the Wrench Lowers?
  • epheterson
  • · Replies 3 ·
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3
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4K
Calculating Magnitude of Force F2 on Mass M
  • BrettL789123
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2
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4K
What Are the Correct Base Units for Electric Field?
  • Kathi201
  • · Replies 1 ·
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1
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21K
Is This Physics Calculation Correct for a Force Problem?
  • dsptl
  • · Replies 1 ·
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1
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2K
Dropped Tennis Ball: Solving for Speed and Force
  • jspek9
  • · Replies 4 ·
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4
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3K
Projectile Motion: Throwing a Package to Reach a 2nd Story Window
  • shwanky
  • · Replies 1 ·
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1
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6K
How Does an Electron Behave Near a Nucleus?
  • ncm2
  • · Replies 1 ·
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1
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3K
Finding Efficiency from a P-V Graph
  • yossup
  • · Replies 2 ·
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2
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Radiation Dosage: Proving 1 Gray = 100 Rads
  • markm51
  • · Replies 4 ·
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4
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5K
What Happens to the Velocities in a Frictionless Curved Surface System?
  • Nikhil Kumar
  • · Replies 6 ·
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6
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3K
Finding Work Done by a Force on a Particle Along a Triangular Path
  • S[e^x]=f(u)^n
  • · Replies 2 ·
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2K
Three forces, one graph, one crazy problem
  • Phoenixtears
  • · Replies 1 ·
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1
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6K
Why Does W(sub ab) = 0 and W(sub bc) = 4 in Dynamics?
  • giant016
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2K
Finding Relations for Net Force with Two Exerted Forces at 150 Degrees Angle
  • Nanoath
  • · Replies 1 ·
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1
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2K
Cars, Ropes, Forces and Bisecting Angles
  • Phoenixtears
  • · Replies 2 ·
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2
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6K
Calculate Internal Resistance: I, R, V & More
  • nslinker
  • · Replies 3 ·
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3
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3K
Calculating Acceleration Change: Oil Drop in Electric Field | F=ma and F_e=qE
  • jaejoon89
  • · Replies 2 ·
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2
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2K
Electric Potential: Find Potential Everywhere from Two Point Charges
  • Crazy Gnome
  • · Replies 1 ·
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1
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2K
How to Calculate Battery Voltage from Resistor Power Dissipation?
  • crh
  • · Replies 3 ·
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3
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6K
Diffraction Minima: Should I Use p or p+0.5 in the Equation?
  • bcjochim07
  • · Replies 5 ·
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5
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3K
A fun new circular motion question
  • Garen
  • · Replies 7 ·
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7
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2K
Thermal Processes: Determine T3
  • yossup
  • · Replies 5 ·
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5
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Projectile Motion of launched ball
  • solarwind
  • · Replies 17 ·
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17
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12K
Two people pushing off each other
  • azure kitsune
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2
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24K
Calculating Speed of a Fishing Boat in a River
  • missie
  • · Replies 5 ·
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5
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2K
What is your velocity relative to the bus?
  • missie
  • · Replies 9 ·
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9
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2K
How much Plutonium 239 will remain after 20,000 years?
  • yoleven
  • · Replies 5 ·
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5
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3K
Energy requirements between orbitals
  • ChiliPanda
  • · Replies 2 ·
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2
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2K
How Do You Calculate Total Energy Stored in a Circuit System?
  • goWlfpack
  • · Replies 5 ·
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5
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18K
Projectile Motion Question: Football Kicker's Goal Post Dilemma
  • Strik3r
  • · Replies 1 ·
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1
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2K
How Is Torque Generated by an Electric Field on a Charged Rod?
  • nckaytee
  • · Replies 1 ·
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1
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4K
Solve the Golf Ball Problem: Time and Speed Calculations | 2-D Homework
  • vietmon
  • · Replies 1 ·
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1
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3K
Projectile Motion, With out numbers
  • hockeyboy
  • · Replies 3 ·
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3
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2K
Solving Universal Gravity Questions: Speed of Earth, Pallas' Orbit
  • hoooossein
  • · Replies 1 ·
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1
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2K
What Are the Solutions to These Projectile Motion Problems?
  • ado21
  • · Replies 1 ·
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1
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4K
So close to solving - force/friction
  • ff4930
  • · Replies 2 ·
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2
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5K
Calculating Energy from Intensity: A Super Nova Scenario
  • Aeighme
  • · Replies 4 ·
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4
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2K
Projectile Motion of Ball Problem
  • jessedevin
  • · Replies 5 ·
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5
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8K