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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Motion of c.o.m. (kleppner 3.7)
- geoffrey159
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Checking if Momentum Operator is Hermitian - Integration
- MPKU
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How Do Two Connected Discs with Masses Affect Angular Acceleration?
- lmao2plates
- · Replies 15 ·
How Long Does It Take an Electron to Travel Through a Copper Wire?
- cseil
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Does the relativistic rocket paradox depend on signal delay?
- slevesque
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Max stretch and amplitude of a mass dropped onto a vertical spring
- Quantum Fizzics
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Total electric potential energy of equilateral triangle
- Herjap
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How Far Can a Person Stand on a Plank Without It Tipping?
- gcombina
- · Replies 3 ·
Escape from gravitational field
- hafiz ns
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Atwood Machine Lab: Graphing and Finding Moment of Inertia | Homework Help
- rttackle
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Fundamental kinematics question
- abram
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In which direction does the friction on the wheel go?
- PhyIsOhSoHard
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Kinetics Problem: Non-constant force (calculus)
- Lola Luck
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Finding the value of k (spring constant)
- p0ps1c1e
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Why is tangential velocity zero at the contact point in rolling motion?
- gcombina
- · Replies 2 ·
A grade 12 physics dynamics problem
- Scatteredheroes
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Initial velocity of box A before collision with box B
- Goozombies
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Calculating Velocity and Time of a Falling Object from a Given Height
- openavalin
- · Replies 1 ·
Figuring out the potential energy
- PhyIsOhSoHard
- · Replies 6 ·
How Does Standing Up Affect the Swing Period of a Child?
- MuonMinus
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How much time can I save in a bike race
- Renton
- · Replies 10 ·
Destructive interference and constructive interference
- shawen
- · Replies 3 ·
Classical Mechanics - Potential Energy Function
- teme92
- · Replies 5 ·
What is the maximum height reached by an acrobat and monkey pair after grabbing?
- geoffrey159
- · Replies 5 ·
Finding the Work Done by Friction w/out Friction
- Internetwork
- · Replies 4 ·
Force on a Parallel Plates Capacitor
- Karol
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Electrostatic equilibrium, deflection of a cobweb
- marcusesses
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How Do You Prove the Time Derivatives of Polar Unit Vectors?
- A2Airwaves
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Tension in the chain from a distance
- ubergewehr273
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General Relativiy - Definition of a test body?
- binbagsss
- · Replies 1 ·
Magnitudes of Velocity and Acceleration
- Tom Lor
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Shear stress in thin wall beams
- princejan7
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Rotational kinematics (mass wrapped around inner hub)
- SamMarine
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When does work=-electric potential and when does it = +
- sanhuy
- · Replies 19 ·
How does Reynolds number relate to lift on scaled-up wings?
- Dennis U
- · Replies 2 ·
Kinematics Book Question -- Rowing a boat across a river at an angle
- raniero
- · Replies 7 ·
Moment of Inertia power plant energy
- 462chevelle
- · Replies 9 ·
Calculating Force Transmitted to Base of a Cantilever Beam
- Dustinsfl
- · Replies 8 ·
Analyzing Energy and Momentum in a Suspended Mass System
- ericoromero
- · Replies 21 ·
What Are Elastic and Inelastic Problems?
- Kaneki
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What is the Den Hartog Criteria for Tuned Mass Dampers?
- Dustinsfl
- · Replies 4 ·
Magnetic Field due to a finitely long wire
- Flyer888
- · Replies 3 ·
Work done on changing direction of a tennis ball
- Chris0101
- · Replies 4 ·
Tension in Room: Find Force of Friction
- youenjoymyself
- · Replies 3 ·
Angular Acceleration (Grindstone Problem)
- gcombina
- · Replies 5 ·
Tension problem, finding acceleration with kinetic friction
- p0ps1c1e
- · Replies 2 ·
How can the kinetic energy ratio be calculated after a bullet collision?
- Physicsnoob90
- · Replies 6 ·
Why am I getting the wrong speed for a train using the Doppler effect formula?
- san512
- · Replies 3 ·
Converting from lb_f/in to N/m issues
- Dustinsfl
- · Replies 2 ·
How Does Bernoulli's Equation Explain Airplane Lift?
- toothpaste666
- · Replies 4 ·
Frictionless Situations - How to get Velocity -Time information
- Sonny18n
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Where Does a Pendulum Reach Maximum Momentum?
- Shindo
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What is KE of the system using F = ma ?
- Karina
- · Replies 9 ·
Stacked blocks on an accelerating elevator
- Chris0101
- · Replies 4 ·
Force Exerted Non-Uniform Circular Motion
- akgtdoskce
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Phase of wave from lower slit in Fraunhofer diffraction
- hdp12
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What is the Most Effective Method for Minimum Stopping Distance in a Car?
- ubergewehr273
- · Replies 4 ·
Velocity of two spheres under gravitational attraction
- Jimmy Jazz
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Momentum, Force and Conservation
- Jack Brown
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Finding the Maximum Displacement and Time of a Piston in a Spring-Damper System
- Lukergr
- · Replies 2 ·
Calculating Electromotive Force in a Time-Dependent Magnetic Field
- Frank Einstein
- · Replies 10 ·
Earth stops moving how long before it hits the sun?
- blue.flake
- · Replies 17 ·
Constraint equation for ball rolling in hemispherical bowl
- dwieker
- · Replies 17 ·
Determine the reaction forces at the supports
- MNWO
- · Replies 4 ·
Accidental explosion (Kleppner 3.4)
- geoffrey159
- · Replies 4 ·
Free body diagram for two stacked blocks with springs and friction
- kiwimia
- · Replies 5 ·
Finding the Center of Mass of a System Using Particle Concentration
- geoffrey159
- · Replies 2 ·
Electrical Energy and Coulombs Law
- rpthomps
- · Replies 5 ·
Which angular equation requires radian measure
- gcombina
- · Replies 2 ·
Total heat removed from phase change
- clickyclicky
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Conservation of Linear momentum - confusing question?
- PhysicStud01
- · Replies 7 ·
When does work equal negative electric potential energy
- sanhuy
- · Replies 2 ·
Why does friction point the opposite as gravity?
- Shindo
- · Replies 2 ·
How Do You Solve Tension Problems with Friction and Acceleration?
- max1995
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How Much Load Can a 300-kg Beam Support Before Exceeding Strut Safety Limits?
- CoogsDownFall
- · Replies 3 ·
Calculating voltage division for an AC circuit?
- 159753x
- · Replies 2 ·
Force applied to a net after dropping
- Toke
- · Replies 4 ·
How to post homework problems on a mobile phone
- john.lee
- · Replies 1 ·
What is the correct way to find the inertia of a bullet entering a door?
- Raisintoe
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Bungee jumping problem with a twist
- harihrn
- · Replies 12 ·
De Broglie wavelength of a tennis ball
- Davidmb19
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What is the Angular Speed of the Bob?
- David Swift
- · Replies 5 ·
Find Unknown Weight w/ Ideal Spring Problem
- Potatochip911
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Is my calculation for work done correct?
- kaspis245
- · Replies 3 ·
Coefficient of Friction of Shoes in Different Temperatures
- DingleTron3000
- · Replies 34 ·
Vector Diagrams for a Transformer
- Smartboy33
- · Replies 2 ·
Determine acceleration given work done and vertical distance
- kaspis245
- · Replies 8 ·
Calculating Normal Force for Blacksmith's Anvil - Newton's Third Law
- rmalski
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How Does Time Dilation Affect Communication and Aging in Space Travel?
- BOAS
- · Replies 18 ·
What is the Equation for Water Pressure on a Dam Wall?
- missdandy
- · Replies 7 ·
Ice skater pushing off a styrofoam cube on frictionless ice
- fightboy
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Special Relativity and the Relativity of Simultaneity.
- alingy1
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How do you calculate acceleration in this scenario?
- imagesparkle
- · Replies 4 ·
How Do You Derive the Lorentz Transformation for Frame S''?
- brainpushups
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Instantaneous currents in RLC Circuit
- BrettJimison
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What is the kinetic energy of a block as water pours out of a container?
- byahnoob
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Minimum angle the ladder can make with the floor without slipping
- sncobra
- · Replies 7 ·
Tipping cylinder tube with balls in it
- Samuelriesterer
- · Replies 21 ·
How to find the mass of a planet when given the radius?
- CluelessPhysics
- · Replies 1 ·
Find the temperature change of a person struck by lightning
- dashortkid
- · Replies 1 ·