Introductory Physics Homework Help Forum

Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.

Threads

Parallel-plate capacitor with 2.50 cm² plates and 1.00 mm separation

  • omarxfa2
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Finding original speed / acceleration

  • mrserv0n
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5
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4

Kinematics - How do I apply them to different problems?

  • 07triumphd675
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4

Trouble calculating the acceleration

  • ERAUin08
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1
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1

What is the relative velocity of a person running on a ship to the shore?

  • veronicak5678
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6

How Long Can You Avoid a Collision with an Accelerating Dragster?

  • aleferesco
  • · Replies 12 ·
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12
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2

Analyzing False Statements about Orbitals

  • a.a
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1
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6

Answer: Calculate Average Power Output for 600 kg Top Fuel Drag Racer

  • lpcampbe
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3

What Angle Does the String Make with the Vertical While Accelerating?

  • ldbaseball16
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5

Solving Frictionless Plane Incline Problem: A & B

  • Thoven
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3

Calculating Time for Side-by-Side Cars: Car Kinematics Homework

  • Youngstabullz
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5

How Do I Calculate Pressure Changes in a Linear Spring System?

  • Saladsamurai
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6

Need help before quiz today. Kinematics

  • joeth04
  • · Replies 7 ·
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7

P-V Diagram: Computing Work and Determining Sign of Work

  • Saladsamurai
  • · Replies 2 ·
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2

Magnitude + direction of block on an incline

  • jspek9
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1

Electric Field Calculation for Three Charges on a Horizontal Line

  • jaejoon89
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2

Calculation of Velocity in reference to circular motion

  • Kdoll1
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1

Find potential energy of system with 3 charges

  • mbmcgee
  • · Replies 7 ·
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7

Finding Ratios of Forces in a Two-Force System | Homework Question

  • Nivlac2425
  • · Replies 3 ·
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3

How Much Light Intensity Is Needed to Suspend a Sheet of Paper?

  • lunus
  • · Replies 3 ·
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3

Can Trigonometry Prove a Dart Always Hits Its Target?

  • LANS
  • · Replies 1 ·
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1

PLEASE HELP Projectile Motion: Two-dimensional Kinematics

  • Npila1
  • · Replies 4 ·
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4

Estimate Earth's Radius Using Sun's Disappearance Time

  • crazyforfood
  • · Replies 2 ·
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2

How Far Away Was the Earthquake if S Waves Arrived 2 Minutes After P Waves?

  • Foxhound101
  • · Replies 9 ·
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9

Bullet acceleration homework problem

  • kmikias
  • · Replies 1 ·
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1

Point Charges and Force vector addition

  • beccaka2003
  • · Replies 7 ·
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7

Dive-bomber projectile motion problem

  • jessedevin
  • · Replies 24 ·
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24

Centripetal Force (Loop the Loop)

  • Kajayacht
  • · Replies 1 ·
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1

Is My Calculation for Astronaut's Centripetal Acceleration Correct?

  • BeckyStar678
  • · Replies 1 ·
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1

Simple Vector Difference Question

  • CoolMan
  • · Replies 1 ·
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1

How dose an angle of an object effect it's distance/

  • katie<3
  • · Replies 12 ·
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12

Find the Distance and Sign of Charge Q for F1 = F2

  • Kathi201
  • · Replies 3 ·
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3

Calculating Relative Motion and Vectors for Moving Cars

  • southernbelle
  • · Replies 6 ·
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6

How many electrons emerge per second?

  • Ithryndil
  • · Replies 2 ·
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2

Thermodynamics question 1 (question about mass)

  • Saladsamurai
  • · Replies 1 ·
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1

Solve Homework Questions: Moon Walk, Slingshot, Ball on String

  • Kaze105
  • · Replies 6 ·
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6

Rotational Equilibrium Lab Question

  • CLeSure
  • · Replies 3 ·
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3

Magnitude of Normal Force (Frictionless)

  • Spartan Erik
  • · Replies 6 ·
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6

Painting hung by a wire suported by two nails

  • SteveM-
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2

Kinetic Friction Problem (Truck Braking)

  • Spartan Erik
  • · Replies 11 ·
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11

Getting the average velocity from a parabolic curve

  • theLHC
  • · Replies 4 ·
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4

Does Flying Across Australia Affect Your Age?

  • fredrick08
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2

Position of object above the ground.

  • Jacobpm64
  • · Replies 3 ·
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3

50N block with 20N force: does it overcome static friction?

  • Spartan Erik
  • · Replies 6 ·
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6

Projectile Motion with acceleration phase

  • ionic_scream
  • · Replies 3 ·
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3

Calculating Distance for Throwing an Egg from a Building

  • veronicak5678
  • · Replies 4 ·
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4

What Is the Coefficient of Kinetic Friction in This Physics Problem?

  • Spartan Erik
  • · Replies 1 ·
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1

Projectile Motion Horizontal Displacement Equation

  • ArbazAlam
  • · Replies 2 ·
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2

Calculate the car's average acceleration

  • Sevenheartz
  • · Replies 3 ·
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3

Projectile Motion: Finding Time to Change Angle from 31° to 21°

  • randomguy123
  • · Replies 2 ·
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2
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7

Juggling Problem: Solving for Time, Speed & Height

  • joeth04
  • · Replies 3 ·
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3

Farday's Disc - Diameter of Disc

  • tpoulter
  • · Replies 2 ·
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2

Help with an acceleration and distance problem

  • science_rules
  • · Replies 9 ·
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9

How Do You Calculate Total Vector Displacement and Average Velocity?

  • -EquinoX-
  • · Replies 4 ·
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4

Electric fields, distance, and potential difference

  • goWlfpack
  • · Replies 4 ·
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4

What is the time taken for these 2 cars to meet?

  • nyrychvantel
  • · Replies 2 ·
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2

What Happens to Torque as the Wrench Lowers?

  • epheterson
  • · Replies 3 ·
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3

Calculating Magnitude of Force F2 on Mass M

  • BrettL789123
  • · Replies 2 ·
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2

What Are the Correct Base Units for Electric Field?

  • Kathi201
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1

Is This Physics Calculation Correct for a Force Problem?

  • dsptl
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1

Dropped Tennis Ball: Solving for Speed and Force

  • jspek9
  • · Replies 4 ·
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4

Projectile Motion: Throwing a Package to Reach a 2nd Story Window

  • shwanky
  • · Replies 1 ·
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1

How Does an Electron Behave Near a Nucleus?

  • ncm2
  • · Replies 1 ·
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1

Finding Efficiency from a P-V Graph

  • yossup
  • · Replies 2 ·
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2

Radiation Dosage: Proving 1 Gray = 100 Rads

  • markm51
  • · Replies 4 ·
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4

What Happens to the Velocities in a Frictionless Curved Surface System?

  • Nikhil Kumar
  • · Replies 6 ·
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6

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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2

Three forces, one graph, one crazy problem

  • Phoenixtears
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1

Why Does W(sub ab) = 0 and W(sub bc) = 4 in Dynamics?

  • giant016
  • · Replies 1 ·
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1
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1

Cars, Ropes, Forces and Bisecting Angles

  • Phoenixtears
  • · Replies 2 ·
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2

Calculate Internal Resistance: I, R, V & More

  • nslinker
  • · Replies 3 ·
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3
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2

Electric Potential: Find Potential Everywhere from Two Point Charges

  • Crazy Gnome
  • · Replies 1 ·
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1

How to Calculate Battery Voltage from Resistor Power Dissipation?

  • crh
  • · Replies 3 ·
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3

Diffraction Minima: Should I Use p or p+0.5 in the Equation?

  • bcjochim07
  • · Replies 5 ·
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5

A fun new circular motion question

  • Garen
  • · Replies 7 ·
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7

Thermal Processes: Determine T3

  • yossup
  • · Replies 5 ·
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5

Projectile Motion of launched ball

  • solarwind
  • · Replies 17 ·
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17

Two people pushing off each other

  • azure kitsune
  • · Replies 2 ·
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2

Calculating Speed of a Fishing Boat in a River

  • missie
  • · Replies 5 ·
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5

What is your velocity relative to the bus?

  • missie
  • · Replies 9 ·
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9

How much Plutonium 239 will remain after 20,000 years?

  • yoleven
  • · Replies 5 ·
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5

Energy requirements between orbitals

  • ChiliPanda
  • · Replies 2 ·
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2

How Do You Calculate Total Energy Stored in a Circuit System?

  • goWlfpack
  • · Replies 5 ·
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5

Projectile Motion Question: Football Kicker's Goal Post Dilemma

  • Strik3r
  • · Replies 1 ·
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1

How Is Torque Generated by an Electric Field on a Charged Rod?

  • nckaytee
  • · Replies 1 ·
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1

Solve the Golf Ball Problem: Time and Speed Calculations | 2-D Homework

  • vietmon
  • · Replies 1 ·
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1

Projectile Motion, With out numbers

  • hockeyboy
  • · Replies 3 ·
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3

Solving Universal Gravity Questions: Speed of Earth, Pallas' Orbit

  • hoooossein
  • · Replies 1 ·
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1

What Are the Solutions to These Projectile Motion Problems?

  • ado21
  • · Replies 1 ·
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So close to solving - force/friction

  • ff4930
  • · Replies 2 ·
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2

Calculating Energy from Intensity: A Super Nova Scenario

  • Aeighme
  • · Replies 4 ·
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4