Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
What is the Normal Force on a Rider in a Ferris Wheel at the Midpoint?
- vadiraja
- · Replies 4 ·
A 63-kg student stands on a 34-kg cart that is free to move
- jasonbans
- · Replies 1 ·
Static Equilibrium of mass and wire
- chara76
- · Replies 5 ·
Designing a simple magnetic field gen with a straight wire. Need current density
- ARBY1
- · Replies 1 ·
Moving wedge, conceptual problem
- hermes1908
- · Replies 2 ·
How Do Infinitely Long LC Circuits Behave?
- channel1
- · Replies 3 ·
Electric Field Magnitude at Point P Inside a Charged Sphere
- eurekameh
- · Replies 9 ·
Calculate Center of Mass for a Figure of Uniform Density
- draotic
- · Replies 16 ·
Buoyancy Problem Involving Archimede's Principle
- aokidopi
- · Replies 7 ·
Find the total entropy of the system?
- gibson101
- · Replies 1 ·
Why Does an Egg Break Differently on Grass Versus Sidewalk?
- jer_hall99
- · Replies 3 ·
Friction force on a skidding car on ice and snow
- jer_hall99
- · Replies 7 ·
A shell explodes into three fragments of equal masses.
- jasonbans
- · Replies 8 ·
Calculating work done in a thermodynamic process
- flygirl
- · Replies 6 ·
N-body simulation- objects accelerate *past* each other
- RossH
- · Replies 4 ·
Calculating Pressure Increase in Arteries with Fatty Tissue Build-Up
- robvba
- · Replies 2 ·
Conflict normal force in inclined plane
- vadiraja
- · Replies 14 ·
Best way to produce electricity?
- kElect
- · Replies 4 ·
Caluclating tension in string that is moving in horizontal circles.
- Dave_1984
- · Replies 15 ·
How much is the mass of the sun losing every second?
- trevorr93
- · Replies 2 ·
Why does the muon decay problem involve the Lorentz factor?
- trevorr93
- · Replies 2 ·
Solving a Hard Energy Physics Problem: Pendulum Cut Question
- fobbz
- · Replies 9 ·
Why is the phase difference -k'r for diffracted waves in diffraction?
- PhysicsGirl90
- · Replies 3 ·
How Does Static Friction Influence Rolling Motion and Torque?
- pacce
- · Replies 11 ·
Physics Heat Ice Water Mixture Question And Find Initial Mass Of Ice
- justinh8
- · Replies 4 ·
Finding speed of a 2.2 eV electron from total energy
- hquiquero
- · Replies 7 ·
Projectile fired from 350 m cliff at 30° to 470 m target
- coldjeanz
- · Replies 1 ·
Heat and work. Fit ring over rod, remove ring from rod
- nicoleb14
- · Replies 1 ·
Throwing ball in air and final velocity.
- AcousticBruce
- · Replies 7 ·
Heat and temperature change in liquid
- darw
- · Replies 2 ·
What Is the Maximum Force to Pull a Box Without Tipping?
- ex81
- · Replies 6 ·
Seven electrons in a rectangular corral with spin
- clowe521
- · Replies 2 ·
How do I calculate static and kinetic friction coefficients?
- ItsNoah
- · Replies 2 ·
How Do Symmetry Considerations Affect the Electric Field in a Dielectric Plate?
- issacnewton
- · Replies 4 ·
Power of a Fan and WindMill using Energy vs dynamic method)
- unscientific
- · Replies 2 ·
Torque/Rotational Dynamics HW Problem
- EndoBendo
- · Replies 2 ·
Conservation of Momentum Conceptual Questions
- pcypoon
- · Replies 1 ·
Solving for t in a distance equation.
- AcousticBruce
- · Replies 13 ·
Displacement with and without friction
- jessiegirl121
- · Replies 1 ·
What Is the Velocity of a Massless Ping-Pong Ball After an Elastic Collision?
- EndoBendo
- · Replies 1 ·
Ball bouncing off inclined plane: finding post-collision velocity
- Plutonium88
- · Replies 22 ·
Rotational motion/conservation HW problem
- EndoBendo
- · Replies 2 ·
Centripetal Acceleration/Rotational Motion HW Problem
- EndoBendo
- · Replies 1 ·
Would the light bulb light up from the electromagnetic wave?
- nake9534
- · Replies 5 ·
Conservation of momentum/mass when dropping an object on a spring.
- JustinLiang
- · Replies 9 ·
Projectile motion apple throw problem
- phee
- · Replies 52 ·
I dont know how to graph these pendulum things
- virusvial
- · Replies 1 ·
The polonium isotope 210Po, an alpha emitter, has a half-life of 138
- MozAngeles
- · Replies 10 ·
Pressure force on aquarium wall with depth change
- Taiki_Kazuma
- · Replies 7 ·
How Do You Calculate the Mass of Oxygen in a Cylinder Using the Ideal Gas Law?
- physgrl
- · Replies 7 ·
SHM: finding time intervals between positions with phase angle
- bdh2991
- · Replies 1 ·
What Volume Does One Mole of Ideal Gas Occupy at 300 K and 1 atm?
- physgrl
- · Replies 1 ·
Determine Moles of Gas in a Container
- physgrl
- · Replies 1 ·
De Broglie wavelength, kinetic energy
- ajmCane22
- · Replies 3 ·
Physics Problem on Angular Momentum
- utm01
- · Replies 2 ·
Statics/Equilibrium - Find the Tension in the Wire
- prosteve037
- · Replies 3 ·
Problem involving mercury thermometer
- xnitexlitex
- · Replies 1 ·
Angular Momentum and collisions w/o friction
- Ric
- · Replies 1 ·
Finding amplitude and phase angle for SHM with initial velocity
- bdh2991
- · Replies 2 ·
Best problems in a Physics textbook
- M. Amin
- · Replies 7 ·
Tension in a rope, wavelengths, etc. I
- somesmallkid
- · Replies 8 ·
Determine d if a plank is not uniform
- skysunsand
- · Replies 3 ·
What Force is Necessary to Submerge Mary in Fresh Water?
- coopertown
- · Replies 1 ·
How to calculate pressure of a mixture of oil Reservoir fuids?
- marcoskids
- · Replies 3 ·
Finding angles in a static weight system
- Miike012
- · Replies 1 ·
Two spinning cylinders stuck together: angular momentum after collision
- skysunsand
- · Replies 10 ·
Calculate Magnitude of Work from 0.22 Lawnmower Engine in 1 Second
- bulbasaur88
- · Replies 1 ·
PV Diagram Problem (ideal efficiency vs actual efficiency)
- stonecoldgen
- · Replies 2 ·
Transverse harmonic wave Equation
- ctwokay
- · Replies 10 ·
Force of a hinge on a hinged beam
- Becca93
- · Replies 3 ·
Acceleration of blocks connected by string over rotating pulley with applied force
- Becca93
- · Replies 10 ·
Car Crash on Inclined Circular Racetrack
- sparkle123
- · Replies 4 ·
Finding the period of a vibrating string
- forestmine
- · Replies 20 ·
Linear speed/how many revolutions are made?
- sweetwilliam
- · Replies 2 ·
How Fast Should a Space Station Rotate to Mimic Earth's Gravity?
- Becca93
- · Replies 4 ·
Amplitude at various points on a string
- forestmine
- · Replies 3 ·
Direction of friction force in circular motion
- sparkle123
- · Replies 4 ·
Number question, addition and multipulcation
- studentxlol
- · Replies 3 ·
Thermodynamics expansion problem
- xnitexlitex
- · Replies 2 ·
Finding Change in Kinetic Energy
- student54321
- · Replies 1 ·
Doppler Effect + Wavelength problem
- KendrickLamar
- · Replies 1 ·
Lab Problems with Simple Harmonic Motion in Springs
- jallison
- · Replies 3 ·
Finding magnitude and direction
- emsfavis
- · Replies 7 ·
Wooden block pulled over pulley by hanging mass
- Snape1830
- · Replies 16 ·
Finding Charge From Changing Magnetic Flux
- SeannyBoi71
- · Replies 8 ·
Acceleration of falling mass and tension in the cord
- skysunsand
- · Replies 7 ·
Calculating moment of inertia about a door hinge.à
- Becca93
- · Replies 8 ·
Why does vmax = ωA give zero velocity at t=0 in SHM?
- Eats Dirt
- · Replies 2 ·
Maximum Intensity Between Dark Fringes, Diffraction
- JackFlash
- · Replies 3 ·
Two Masses Hanging on a Massive Pulley
- Becca93
- · Replies 9 ·
Velocity and acceleration of a standing wave
- forestmine
- · Replies 2 ·
Which quantities stay fixed when a conducting sphere enters a conducting can?
- conquerer7
- · Replies 2 ·
Impulse Multiple choice question
- newport
- · Replies 3 ·
What is the Maximum Angular Velocity of a Ball in Horizontal Circular Motion?
- Quantum Mind
- · Replies 2 ·
Minimum turns for rope wound around cylinder to maintain equilibrium
- maine0504
- · Replies 6 ·
Maximum speed and acceleration for 1.11 kg mass on spring
- Becca93
- · Replies 2 ·
Find Acceleration At Time t For Mass on a Spring
- Becca93
- · Replies 3 ·
What Should Be the Tension in a Guitar String Producing Middle C?
- forestmine
- · Replies 1 ·
What Is the Speed of a Sledgehammer's Center of Mass After Being Released?
- Becca93
- · Replies 9 ·
What is the moment of inertia for a rod with an attached mass at the end?
- trivk96
- · Replies 5 ·