Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
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Why Is the Ball's Energy -196 J at the Bottom of the Well?
- CodeWebs
- · Replies 27 ·
Generally, how do you solve physics problems?
- AznBoi
- · Replies 19 ·
What Is the Tension in the Remaining String After Cutting One Support?
- franniemeow07
- · Replies 2 ·
Spring force and velocity for ball in vertical circular motion
- sixstringartist
- · Replies 3 ·
Thermodynamics compressor Question
- Jason Brooks
- · Replies 3 ·
Wheel decelerating from 100 rpm: finding angular acceleration, torque, and force
- tupldy
- · Replies 13 ·
What is the correct maximum altitude and flight time calculation for a rocket?
- Coffeepower
- · Replies 4 ·
Quantum numbers, Bohr model calculations, and electron diffraction
- smity711
- · Replies 1 ·
Compression of a Spring on an Asteroid?
- smedearis
- · Replies 6 ·
What Is the Linear Acceleration of a Sphere Rolling Down an Incline?
- rleung3
- · Replies 3 ·
M-How to calculate force on a surface due to a beam of particles?
- debwaldy
- · Replies 3 ·
Centripetal force Rotor-ride problem
- Gauss177
- · Replies 6 ·
Some questions concerning centripetal force.
- wtf_albino
- · Replies 8 ·
Building a mechanical object that jumps without springs or balloons
- jonlai9
- · Replies 55 ·
Horizontal force on a 2.00 kg block on a 60° incline
- twistedps
- · Replies 4 ·
Energy to move mass (potential energy)
- merced
- · Replies 2 ·
Should I get a 150 dollar calculator for Physics B AP SAT Subject test?
- AznBoi
- · Replies 12 ·
Calculating Steel String Length and Frequency for Optimal Guitar Performance
- redribbbon
- · Replies 7 ·
How Does Rotation Affect Fluid Pressure and Surface Height in a Spinning Pan?
- moosemagoo
- · Replies 1 ·
Tennis ball launcher: predicting range with bungee cord energy
- imusion
- · Replies 5 ·
Why Does a Helium Balloon Tilt Forward in an Accelerating Car?
- HHveluj
- · Replies 3 ·
Find Spring Constant of Elastic Rope: Mountain Climber Problem
- Ertosthnes
- · Replies 4 ·
What Is the Angle Between the Pendulum and the Vertical?
- Fusilli_Jerry89
- · Replies 3 ·
Elastic Collision with 280kg Ball: Mass & KE Transfer Calculation
- rie_06
- · Replies 10 ·
Centripetal force question + other question
- demode
- · Replies 2 ·
A rockets force in different enviornments
- wakejosh
- · Replies 10 ·
Refraction (magnification) - very basic
- FrogPad
- · Replies 2 ·
How long must a lever be for a 50 kg boy to lift a 2500 kg boulder?
- Kogsug
- · Replies 5 ·
Drinking in Zero Gravity: Challenges and Solutions
- wakejosh
- · Replies 3 ·
Heat Transfer in Elephant Ears: Convection and Radiation
- wakejosh
- · Replies 5 ·
Finding Equilibrium in a Weighted System
- twistedps
- · Replies 2 ·
Kinetic Energy and bowling ball Question
- JCB
- · Replies 4 ·
Solving Sonar Wavelength for Bats Detecting Mosquitos
- wakejosh
- · Replies 1 ·
How Do You Calculate the Center of Mass of a Composite Slab?
- ticklemepink20
- · Replies 1 ·
Understanding Acceleration: Can It Be a Change in Speed or Direction?
- wakejosh
- · Replies 2 ·
Is Centripetal Force Always Directed Towards the Center of a Circular Path?
- wakejosh
- · Replies 1 ·
Spaceship time dilation calculations with negative results
- chevycamaro1987
- · Replies 2 ·
How Much Ice Melts in a Carnot Engine Cycle?
- jalpabhav
- · Replies 1 ·
What is the necessary gap width for thermal expansion of concrete sidewalks?
- Crimsonangel
- · Replies 4 ·
Magnitude of the Force of a kick to a basketball
- smedearis
- · Replies 7 ·
Angular velocity of ball-mass system
- smedearis
- · Replies 1 ·
How Do Rotational Dynamics Affect Object Movement?
- hannibalisfun
- · Replies 1 ·
Angular Momentum of Disk Question
- smedearis
- · Replies 5 ·
How can the Dobbler Effect be used to monitor fetal heartbeats?
- vinny380
- · Replies 2 ·
How Do Tension and Torque Affect Equilibrium in Physics Problems?
- blackout85
- · Replies 7 ·
Among Simple harmonic oscillation, simple pendulum and physical pendulum
- parwana
- · Replies 10 ·
How Long Does It Take to Heat a Room Using Newton's Law of Cooling?
- esw6838
- · Replies 5 ·
How Fast Are Charged Particles Moving When Halfway Together?
- metalmagik
- · Replies 1 ·
How to Apply Friction and Gravity to a 3D Velocity Vector?
- fmucker
- · Replies 32 ·
Calculating Protons after 2 Seconds - R and C Values
- chevycamaro1987
- · Replies 4 ·
How Much of a Glass Cube's Surface Must Be Covered to Hide a Central Spot?
- kreil
- · Replies 1 ·
How Does a Cylinder Roll Down an Inclined Plane?
- aixagent
- · Replies 2 ·
I have a few questions, this one is special relativity.
- chevycamaro1987
- · Replies 6 ·
Solving Pinball Machine Spring Force Problem
- wallercp
- · Replies 2 ·
Probably an easy kinematics question
- antiflux
- · Replies 23 ·
Student Librarian Does Work on Book
- Iceclover
- · Replies 3 ·
How Much Work Does a Crane Do to Lift Soil?
- Iceclover
- · Replies 5 ·
What is the angle of the rope in Physics 11 problem 10?
- Iceclover
- · Replies 3 ·
How Do You Calculate the Average Force Applied to a Basketball with a Kick?
- jghappel
- · Replies 1 ·
.Calculating 'k' and 'w' in Wave Problem
- mikefitz
- · Replies 3 ·
Finding oil density from a floating wood block
- mikefitz
- · Replies 2 ·
Tension in cable holding submerged lead in water
- twotaileddemon
- · Replies 15 ·
Calculating Enthalpy of Neutralization in Calorimetry Experiment
- boredooom
- · Replies 1 ·
Astronomy/Astrophysics Exam Assistance Needed!
- robertlouis
- · Replies 10 ·
BIENT PRESSURE: Can Vacuum Pressure be Multiplied?
- Idea04
- · Replies 3 ·
Diver seeing lake-bed reflected in water surface at critical angle
- lecker1003
- · Replies 8 ·
K; the force constant of a spring
- fyzikschik
- · Replies 15 ·
What is the radius of the spherical air bubble before it reaches the surface?
- steve12
- · Replies 2 ·
Heat Flow through Three Rods problem
- kenau_reveas
- · Replies 4 ·
Rotational speed of the minute hand of a watch
- blackout85
- · Replies 3 ·
Calculating Longest Wavelength of Light to Eject Electrons
- chemilliterate
- · Replies 3 ·
Solving Heat Transfer Rate for 10 mm Ice Layer at -5°C
- debwaldy
- · Replies 2 ·
Electric Forces; Coloumb's Law question
- fyzikschik
- · Replies 3 ·
Where Can I Find Past Papers for Edexcel Nuffield AS Level Physics?
- Bez
- · Replies 4 ·
Find the moment of inertia about the x axis
- integra2k20
- · Replies 5 ·
Multiple kinematics problems from AP physics homework
- 1010101a
- · Replies 18 ·
Finding acceleration to keep block stationary relative to inclined surface
- Kruger
- · Replies 1 ·
Conductive Heat Loss from a House
- kenau_reveas
- · Replies 1 ·
Do Rotational Inertia Calculations Require Integration?
- blackout85
- · Replies 3 ·
Work done against repulsive Coulomb force
- Alt+F4
- · Replies 4 ·
Wave motion is expressed with trigonometric functions
- Bez
- · Replies 9 ·
[thermodynamics] spherical shell problem
- a_lawson_2k
- · Replies 10 ·
Sound Wave Intensity/Sound Level
- threewingedfury
- · Replies 1 ·
Finding tensions and masses in equilibrium systems
- prace
- · Replies 7 ·
Force of gravity if the Earth's radius, r = r/2
- prace
- · Replies 5 ·
Finding Projectile Velocity with a Spring Launcher - Kinematics Equations
- fyzikschik
- · Replies 1 ·
Calculating Distance in Two Different Methods
- stardrop
- · Replies 3 ·
Find the magnitude and direction of the electric force
- metalmagik
- · Replies 2 ·
Time for a wheel to complete one revolution at 3.0 rad/s
- blackout85
- · Replies 1 ·
Number of photons emitted between transitions
- Amith2006
- · Replies 2 ·
How Does Ore Loading Affect Kinetic Energy and Momentum of a Car?
- Fusilli_Jerry89
- · Replies 1 ·
Why is rotational kinetic energy included in total energy of a rolling ball?
- mikefitz
- · Replies 1 ·
Why Do Equal Torques Keep a Lever in Equilibrium?
- mikefitz
- · Replies 1 ·
Calculating Torque of a Uniform Door Due to its Own Weight
- mikefitz
- · Replies 1 ·
Projectile Motion of a golf ball
- ada15
- · Replies 10 ·
Minimal speed for projectile to reach point (x, y)
- squid
- · Replies 20 ·
Velocity of mass in double pulley system
- the_dialogue
- · Replies 7 ·
How do angle of incidence and reflection relate in total internal reflection?
- student85
- · Replies 4 ·
How to calculate the comet's speed?
- jkh4
- · Replies 5 ·
Electrostatics coulomb's law problem
- meme06
- · Replies 2 ·