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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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
- · Replies 3 ·
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
- · Replies 4 ·
Electrostatic equilibrium, deflection of a cobweb
- marcusesses
- · Replies 2 ·
How Do You Prove the Time Derivatives of Polar Unit Vectors?
- A2Airwaves
- · Replies 4 ·
Tension in the chain from a distance
- ubergewehr273
- · Replies 2 ·
General Relativiy - Definition of a test body?
- binbagsss
- · Replies 1 ·
Magnitudes of Velocity and Acceleration
- Tom Lor
- · Replies 2 ·
Shear stress in thin wall beams
- princejan7
- · Replies 1 ·
Rotational kinematics (mass wrapped around inner hub)
- SamMarine
- · Replies 2 ·
When does work=-electric potential and when does it = +
- sanhuy
- · Replies 19 ·
Understanding Lift & Wings: Upscaling Data for Real Planes
- 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
- · Replies 2 ·
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 ·
The Doppler Effect Homework: Speed of Train from 940Hz to 915Hz
- 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
- · Replies 2 ·
Where Does a Pendulum Reach Maximum Momentum?
- Shindo
- · Replies 3 ·
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
- · Replies 3 ·
Wave Optics & Two-Slit Interference Explanation
- hdp12
- · Replies 3 ·
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
- · Replies 2 ·
Momentum, Force and Conservation
- Jack Brown
- · Replies 3 ·
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 ·
Solve Ball in Bowl Dispute: Get the Correct Constraint Equation
- dwieker
- · Replies 17 ·
Determine the reaction forces at the supports
- MNWO
- · Replies 4 ·
Accidental explosion (Kleppner 3.4)
- geoffrey159
- · Replies 4 ·
Help on a free body diagram and equation
- 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 ·
Can someone explain this to me please?
- gcombina
- · Replies 2 ·
Total heat removed from phase change
- clickyclicky
- · Replies 1 ·
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
- · Replies 3 ·
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 ·
What is the optimal format for posting physics problems on a forum?
- john.lee
- · Replies 1 ·
What is the correct way to find the inertia of a bullet entering a door?
- Raisintoe
- · Replies 3 ·
Bungee jumping problem with a twist
- harihrn
- · Replies 12 ·
De Broglie wavelength of a tennis ball
- Davidmb19
- · Replies 8 ·
What is the Angular Speed of the Bob?
- David Swift
- · Replies 5 ·
Find Unknown Weight w/ Ideal Spring Problem
- Potatochip911
- · Replies 3 ·
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
- · Replies 2 ·
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 ·
Solve Momentum Problem: Ice Skater & Cube
- fightboy
- · Replies 2 ·
Special Relativity and the Relativity of Simultaneity.
- alingy1
- · Replies 2 ·
How do you calculate acceleration in this scenario?
- imagesparkle
- · Replies 4 ·
How Do You Derive the Lorentz Transformation for Frame S''?
- brainpushups
- · Replies 5 ·
Instantaneous currents in RLC Circuit
- BrettJimison
- · Replies 3 ·
What is the kinetic energy of a block as water pours out of a container?
- byahnoob
- · Replies 1 ·
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 ·
Solve Acceleration Problem: 10 & 20 lb Blocks, Rope Friction Coefficient 0.2
- eriklee95
- · Replies 4 ·
Calculating Stopping Distance of Car: Formula & Var. Explanation
- laneschmidt
- · Replies 2 ·
Solve Spring & Ball Puzzle: Find m1, m2, k & Sm1
- Peethassandwich
- · Replies 2 ·
Calculating speed with mass and final velocity
- Nodabove
- · Replies 2 ·
Question about frictional and normal force
- imagesparkle
- · Replies 1 ·
Find intensity of radiating electric dipole
- QuantumCurt
- · Replies 2 ·
Physics Chapter 4: Stopping Time for a Truck Carrying 6000 kg Load at 15 m/s
- Tiana
- · Replies 2 ·
Electron in a One Dimensional Infinite Potential Well
- FaraDazed
- · Replies 6 ·
Some questions about Spectrum Techniques Lab
- Pual Black
- · Replies 6 ·
LRC Series Circuit Voltage amplitude question.
- BrettJimison
- · Replies 4 ·
What Forces Act on a Particle at the Bottom of a Frictionless Slide?
- 'nuck
- · Replies 1 ·
Why Does the Force Calculation for the Block System Vary Between Solutions?
- Abid Rizvi
- · Replies 6 ·
Centripetal Acceleration at top of Loop
- Sylvia
- · Replies 3 ·
How Do You Calculate the Kinetic Energy of a Moving Body?
- kaspis245
- · Replies 6 ·
Projectile Motion - Solving for initial velocity w/o time
- Sungura
- · Replies 5 ·
What is the acceleration of the crate?
- Sylvia
- · Replies 12 ·
What Happens to Velocities in a Head-On Collision?
- gcombina
- · Replies 9 ·