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 Much Force to Overcome Static Friction and Move a Sled?
  • literati
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Mastering Projectile Motion to Solving Problems with Sig Figs
  • nummytreat05
  • · Replies 2 ·
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2
Calculate the Electric Potential
  • discoverer02
  • · Replies 8 ·
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8
A football punter accelerates a 0.56kg football
  • mustang
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2
What is your understanding of force?Understanding Force: A Brief Overview
  • Astronomer107
  • · Replies 5 ·
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5
What is the largest number of pieces you can get by cutting a pizza
  • wubie
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2
Determine the angle between the inclined plane and the horizontal
  • Gtseviper
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2
Background Radiation+empirical and molecular formula
  • Yaqout
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2
Nonconservative Forces (conceptual)
  • Blade
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3
What Formulas Do You Use to Solve These Tricky Physics Problems?
  • stitch12
  • · Replies 7 ·
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7
A compact car, mass of 725 kg, is moving at 100 km.hr.
  • kath102245
  • · Replies 5 ·
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5
Light Refraction/ Reflection/ Etc
  • FestiveF
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2
Struggling with Physics Homework? Is There a Book That Can Help Me?
  • lurch0038
  • · Replies 2 ·
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2
Gravitation n Projectile Motion
  • Muhammad
  • · Replies 3 ·
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3
How can you accurately measure your weight on Jupiter without a solid surface?
  • Math Is Hard
  • · Replies 2 ·
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2
What Is the Triple Point Temperature Based on Given Thermodynamic Equations?
  • whitewanderer
  • · Replies 4 ·
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4
Solving the Ramp Problem: Finding Time to Stop Sliding on a Horizontal Surface
  • Ninja_P
  • · Replies 2 ·
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2
Challenging physics problems uniform circular motion, centripetal force
  • adeel
  • · Replies 2 ·
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2
Extremely Confusing Energy Question - Involves Springs
  • Foon
  • · Replies 2 ·
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2
Calculating Car Speed Based on Skid Mark Distance and Friction Coefficient
  • FLANKER
  • · Replies 6 ·
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6
How Long Does It Take for a Phonograph Record to Stop Spinning?
  • nautica
  • · Replies 2 ·
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2
How Do You Solve Accelerated Linear Motion Problems in Physics?
  • mcintyre_ie
  • · Replies 3 ·
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3
Crate Freefall Calculation: Air Drag at 2,000m Altitude
  • espo
  • · Replies 2 ·
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2
How Hard Must a Window Washer Pull to Raise Herself at Constant Speed?
  • zm87
  • · Replies 2 ·
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2
Acceleration of a car that goes from rest to 69 km h in 9 seconds
  • espo
  • · Replies 2 ·
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2
Air resistance of someone falling out of an airplane
  • espo
  • · Replies 2 ·
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2
Initial vertical component of velocity is 61 m/s
  • espo
  • · Replies 2 ·
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2
Newtons does a 40 kg bag of stones weigh
  • espo
  • · Replies 2 ·
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2
How Do You Calculate the Resultant Force of Two Perpendicular Forces?
  • espo
  • · Replies 2 ·
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2
Is 100N the Correct Calculation for Net Force Given These Directions?
  • espo
  • · Replies 2 ·
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2
An apple falls from a tree and 0.5 second later hits the ground
  • espo
  • · Replies 2 ·
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2
Problem about Einstein's postulate
  • silver
  • · Replies 5 ·
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5
What was the speed of the bullet at impact?
  • stitch12
  • · Replies 2 ·
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2
Solving Gauss' Law Problem with J.J. Thomson Model of Hydrogen Atom
  • discoverer02
  • · Replies 3 ·
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3
How High Will Tarzan Swing on the Vine?
  • LiquidIce
  • · Replies 5 ·
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5
This is actually a college level question.
  • ACLerok
  • · Replies 3 ·
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3
Help with A-level physics coursework. focal lengths of lenses
  • Xafron
  • · Replies 7 ·
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7
What prevents a star from collapsing under its own gravitational attraction?
  • nlink1979
  • · Replies 1 ·
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1
Which one of Newton's laws is this equation from and why?
  • marshall4
  • · Replies 3 ·
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3
Calculating Tarzan's Height on a Vine at 8.0 m/s - Grade 11 Question
  • LiquidIce
  • · Replies 4 ·
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4
Solving a Spring Constant Problem for Projectile Motion
  • outerrim
  • · Replies 6 ·
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6
Write an expression for the Optical path length
  • goodo
  • · Replies 2 ·
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2
How Do Matrices Help in Ray Tracing a Scratched Glass Sphere?
  • frankR
  • · Replies 2 ·
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2
1350Kg tuned up Civic moving at 15m/s hits a 1450Kg car moving at 12m/s
  • DrVirus
  • · Replies 5 ·
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5
One Last Problem, also related to energy
  • Antepolleo
  • · Replies 1 ·
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1
Find the speed of the ball after the ball leaves the bat
  • Le
  • · Replies 3 ·
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3
Centripetal Acceleration calculation help
  • nautica
  • · Replies 2 ·
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2
Conservation of angular momemtum
  • nautica
  • · Replies 2 ·
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2
Calculating Energy Requirements for Human Activity on Inclined Surfaces
  • thegame
  • · Replies 2 ·
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2
Do Wave Functions in Different Positions Form an Orthonormal Set?
  • einai
  • · Replies 9 ·
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9
How will the wind affect the plane's course and speed?
  • cowgiljl
  • · Replies 3 ·
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3
Permutations Help: Solving Questions About Collect and Seating Arrangements
  • adeel
  • · Replies 3 ·
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3
Physics Problem: Finding Final Velocity and Distance Traveled on a Ramp
  • aerichk
  • · Replies 2 ·
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Rate constant of enzymatic reaction
  • schordinger
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Projectile motion formulas help
  • cowgiljl
  • · Replies 2 ·
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Master the Bonus Physics Problem with Integration | 1000 kg Boat Case Study
  • Tony Zalles
  • · Replies 2 ·
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2
Calculating Acceleration and Velocity in a Pulley System: A Physics Problem
  • mcintyre_ie
  • · Replies 5 ·
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Calculate the linear acceleration of a car
  • nautica
  • · Replies 2 ·
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2
C++ Runtime Error Fix: Help Find What I've Done Wrong
  • enigma
  • · Replies 4 ·
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4
Do Heavy or Light Elements Better Stop Slow Neutrons?
  • kylemadigan
  • · Replies 2 ·
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Finding Displacement on a Velocity Time Graph
  • JDK
  • · Replies 4 ·
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4
Solving Exponential and Spring Constant Problems in Physics | Need Help?
  • Jammy
  • · Replies 4 ·
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4
Rotational dynamics of platform
  • rayf01
  • · Replies 4 ·
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4
How can E=mc^2 be used to calculate the radiation from a nuclear blast?
  • nlink1979
  • · Replies 5 ·
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Rotational Dynamics] Quadriceps Muscle Force Calculation
  • Nb
  • · Replies 1 ·
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Calculate the speed when the box reaches the bottom of the incline
  • cowgiljl
  • · Replies 2 ·
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Resultant Magnitude & Direction: 158.98 N, -86.04° E of S
  • cowgiljl
  • · Replies 3 ·
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Hello, my name is matt and i have a problem.
  • flutieflakes
  • · Replies 4 ·
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4
How Many Campers Are Needed to Find the Correct Path?
  • wubie
  • · Replies 1 ·
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1
How to Calculate Distance Traveled in a Momentum Problem with Friction
  • Spectre32
  • · Replies 3 ·
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3
Maximizing Tension in Vertical Circular Motion with Work-Energy Theorem
  • Juntao
  • · Replies 6 ·
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6
Help Algebra 2/Trigonometry Problem
  • daodude1987
  • · Replies 2 ·
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2
What is the constant angular acceleration of a rotating wheel?
  • Nanabit
  • · Replies 3 ·
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3
Work, Energy, and the CWE Theorem
  • FrostScYthe
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2
How do I solve for theta in this friction-less pulley problem?
  • AaronP85
  • · Replies 4 ·
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4
Kepler's third law and multiple formulas
  • stressedout
  • · Replies 2 ·
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2
Solve RLC Series Circuit: Find Vrms, Power Factor & Draw Phasor
  • discoverer02
  • · Replies 2 ·
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2
How is the Sine Series Derived for Piecewise Functions?
  • hawaiidude
  • · Replies 2 ·
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2
Solving for Initial Velocity in Physics Lab | Explanation and Step-by-Step Guide
  • daodude1987
  • · Replies 2 ·
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Solving Dynamics Problems with Forces, Work, and Energy
  • Pepsi
  • · Replies 3 ·
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3
Calculating Forces: Preventing Masses from Falling on Frictionless Floor
  • mikeydsiu97
  • · Replies 3 ·
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3
Why Can't a Weight Lifter Float in Air?
  • parthivsmehta
  • · Replies 2 ·
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Mercury thermometer temperature problem
  • robgb
  • · Replies 6 ·
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Positron in a magnetic field help
  • JaeSun
  • · Replies 5 ·
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5
A 0.50 kg object is at rest. A 3.29 N force
  • mustang
  • · Replies 4 ·
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4
How Is Internal Energy Affected by Friction in Physics Problems?
  • Antepolleo
  • · Replies 5 ·
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5
What angle does the ramp make with the ground Static friction
  • ryan
  • · Replies 9 ·
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9
Help with Guitar HW: Standing Waves & Frequency Calcs
  • Acidvoodoo
  • · Replies 2 ·
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2
Where Did the .25J of Energy Go?
  • PS
  • · Replies 2 ·
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Calculate the temperature measured on the resistance scale
  • robgb
  • · Replies 1 ·
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1
Solving Incline Plane Problem: Find Min Acceleration
  • J.T.
  • · Replies 3 ·
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3
Solved: Forces on a Bike: Calculating Friction and Total Force
  • Rockdog
  • · Replies 2 ·
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Maximizing Range: Tips for a High School Physics Project
  • profkth
  • · Replies 4 ·
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4
Speakers sound level at a certain point.
  • Lipd
  • · Replies 2 ·
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2
Projectile Stone Off Cliff question
  • badboyben03
  • · Replies 5 ·
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Kinetic Energy Conservation in an Explosive System
  • walker
  • · Replies 5 ·
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5
What is the average acceleration of a car
  • espo
  • · Replies 4 ·
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What is the Taylor series for i^i?
  • Khan
  • · Replies 2 ·
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2
Electric Fields in circular wire
  • discoverer02
  • · Replies 2 ·
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2
Solving Kinematics Problems: Understanding Initial and Final Velocity in Physics
  • Dil
  • · Replies 2 ·
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