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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P-state lightwave at 45° with angular frequency ω and amplitude E₀
- cuti_pie75
- · Replies 3 ·
What Are Three Cable-Free Long Range Communication Methods?
- iKyleee
- · Replies 13 ·
Angle for a banked curve (friction-less surface)
- physgrl
- · Replies 12 ·
Principle of triangle of forces
- verb tense
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Does momentum change depend on whether a collision is elastic or inelastic?
- nukeman
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Simple gravitational attraction forces problem
- kirby27
- · Replies 8 ·
What is the required deceleration to stop a car in a given distance and time?
- sawtooth500
- · Replies 7 ·
1) A rope 5m is fastened to two hooks 4m apart on a horizontal
- verb tense
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Why does capacitor impedance switch between +j and -j in J notation?
- lubo
- · Replies 1 ·
Help with Homework Statement 1b: Elasticity & Pressure
- Vexysery
- · Replies 6 ·
How to Find g from the Gradient of a Distance-Time Graph?
- jendrix
- · Replies 2 ·
Calculating Magnetic Field at a Point Using Biot-Savart Law
- Eva01
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Centripetal Force with angle problem
- taxidriverhk
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How do radius and centripetal force change when rotation frequency increases?
- chris_0101
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How Do You Sketch a Velocity-Time Graph for Constant Velocity and Acceleration?
- iamBevan
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How to Calculate Speed in Circular Motion on a Hemisphere Surface?
- furor celtica
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Find the time of a certain velocity
- pberardi
- · Replies 15 ·
Activity of 1 mg of plutonium-239 produced per week
- roam
- · Replies 3 ·
Bowling ball rolling off 18.4° roof 12m high
- physicsgeek54
- · Replies 6 ·
How Much Work Is Needed to Alter a Crate's Velocity?
- jtc143
- · Replies 2 ·
Total energy of an airplane, work done against air resistance
- furor celtica
- · Replies 3 ·
Weight of an astronaut at the midpoint between two equal mass stars
- trulyfalse
- · Replies 1 ·
Quantum mechanics, harmonic oscillator
- fluidistic
- · Replies 10 ·
Pilot's apparent weight at top and bottom of vertical loop
- dgibbs
- · Replies 2 ·
Did a Comet Slam Into Earth and Combine with It After Collision?
- siriux
- · Replies 4 ·
Finding Δx of a box sliding down an inclined plane using Work theory.
- bac2789
- · Replies 4 ·
Equilibrium cylinder and plank on incline
- joemama69
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How Long Should Pilots Fire Engines for Safe Re-entry?
- pkhor
- · Replies 4 ·
Calculating final velocity of an object on an inclined plane
- trulyfalse
- · Replies 8 ·
Calculating impedance, real and imag part
- samson07
- · Replies 1 ·
Just finished my first Physics exam, Bus braking Problem
- rexexdesign
- · Replies 2 ·
Newton's law of cooling to find time of death
- Lee.Robbo
- · Replies 2 ·
Why does a glass topple when the cloth is pulled from under it
- N53nick
- · Replies 2 ·
A 9.0 killogram mass and a 3.0 kg mass are at rest on a frictionless
- scbeturner
- · Replies 10 ·
How to Determine Force Magnitude in a Static Friction Problem?
- dgibbs
- · Replies 16 ·
Finding equivalent resistance with a dependent source in a circuit
- VitaX
- · Replies 13 ·
Find The Max Velocity (using coefficient of friction)
- bauncncai
- · Replies 5 ·
Horse Trailer and Center of Mass
- TMO
- · Replies 1 ·
Solve Open Circuit Problem 3: Two Batteries and 3 Bulbs
- gtqueen371
- · Replies 4 ·
What was the initial velocity of a curling stone released at the hog line?
- tatterspwn
- · Replies 11 ·
RL circuit with three resistors
- syhpui2
- · Replies 4 ·
Ratio of mass for equal length and resistance in Al vs Cu
- I-need-help
- · Replies 4 ·
Circular motion with friction and banking - resultant forces
- exi
- · Replies 4 ·
Three capacitors RC circuit questions
- syhpui2
- · Replies 3 ·
How Does Energy Increase in an RL Circuit with Time-Varying Current?
- syhpui2
- · Replies 3 ·
Time constant for the current through the inductor
- syhpui2
- · Replies 3 ·
What Happens to Current Direction in an RL Circuit When the Switch is Opened?
- syhpui2
- · Replies 3 ·
Plots of B•dl as a function of position along the closed path
- syhpui2
- · Replies 3 ·
Galilean transformation / calculating frequency problem
- Lindsayyyy
- · Replies 1 ·
Dropping a newspaper from a moving car with friction on the ground
- paxian
- · Replies 5 ·
What Determines the Direction of Rotation in a Current Loop?
- syhpui2
- · Replies 4 ·
What Is the Magnetic Field at the Axis of a Circular Loop?
- syhpui2
- · Replies 6 ·
Confusion regarding resolution of forces
- Quantum Mind
- · Replies 9 ·
Answer My Questions on Calculating Angles from a Picture
- hpla
- · Replies 3 ·
Parallel RC circuit with realistic battery
- CornellMechE
- · Replies 4 ·
Someone me with this cylinder floating upside down in water
- gharrington44
- · Replies 12 ·
Question on banked curve, Application of Newtons Laws
- Elysian
- · Replies 1 ·
Deriving acceleration and velocity for a model car
- JamesCreswell
- · Replies 1 ·
Hubble Constant and Age of the Universe
- dstar288
- · Replies 6 ·
Static friction of ration of wheel
- kahwawashay1
- · Replies 7 ·
Why does my inelastic collision distance calculation give 7.46 instead of 0.246?
- DavidAp
- · Replies 1 ·
Simple block tension Newton gravity problem
- kirby27
- · Replies 1 ·
Newton's 3rd Law - action/reaction pairs
- jamesnb
- · Replies 3 ·
Amount of time for a half period to occur
- Capncanada
- · Replies 9 ·
Conservation of energy with a mass and pulley system.
- sdoi
- · Replies 3 ·
Rotational Dynamics Equilibrium - Torque With PICS
- fobbz
- · Replies 1 ·
Weight of water displaced by a boat in salt water
- 1MileCrash
- · Replies 5 ·
Solving for Compression of Unstretched Spring
- DavidAp
- · Replies 1 ·
Understanding gravitational attraction
- Miike012
- · Replies 1 ·
Why is friction going this way?
- eurekameh
- · Replies 4 ·
Loss of mechanical energy due to friction - ?
- nukeman
- · Replies 13 ·
Current after (1) time constant in RC circuits
- rotiff
- · Replies 1 ·
Velocity squared veurses distance
- enthdegree
- · Replies 1 ·
Proton in magnetic and electric field
- syhpui2
- · Replies 2 ·
Plane immersed in the earth's vertically downward-pointing magnetic field
- syhpui2
- · Replies 2 ·
Coordinate axis (which one is correct)?
- Miike012
- · Replies 1 ·
A block on a frictionless slope slides down and compresses a spring
- enthdegree
- · Replies 1 ·
Why is there no current between AF and DG in a left-right symmetric circuit?
- sparkle123
- · Replies 3 ·
Momentum of Astronaut and Satellite
- LastXdeth
- · Replies 6 ·
Acceleration of block/pulley system
- genevieveb
- · Replies 2 ·
Use the impulse-momentum theorem to find how long the sled takes to travel
- lanky011
- · Replies 1 ·
Momentum of a Bullet Contacting a Block
- LastXdeth
- · Replies 9 ·
Why does the graph of g(x) = arcsin(sin(x)) look like a sawtooth?
- The_Brain
- · Replies 4 ·
So, V_F= 11m/sWhat is the speed of the potted plant after falling 6m?
- mcHefner
- · Replies 2 ·
Solving for force with sliding friction
- rzlblrt417
- · Replies 1 ·
Forming a matrix using Euler's method and ODE
- jaobyccdee
- · Replies 2 ·
Why does work equals kinetic energy of friction?
- zzoo4
- · Replies 3 ·
Relationship between Electric Fields and Distance from point charge?
- dougouk
- · Replies 2 ·
Angular Acceleration of A Rigid Rod
- tzacher
- · Replies 5 ·
Center of Mass Identical Size Object Connected by Spring
- Crazynutjob
- · Replies 2 ·
Will the acceleration of two particles be different with a rough surface?
- Jadenag
- · Replies 6 ·
Why Is Thermal Expansion the Same for Solid and Hollow Spheres?
- harshaxnim
- · Replies 1 ·
Choose the best answer on Magnetic Fields and Moving charges
- Physics Help!
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Optics question regarding rays.
- Ishida52134
- · Replies 1 ·
Final current through resistors
- sabak22
- · Replies 1 ·
Circular motion of 4 kg object with angular displacement
- Joyci116
- · Replies 1 ·
How Do You Calculate the Force in a Parallel Plate Capacitor?
- Lucretius
- · Replies 4 ·
Optics: when are images virtual and when are they real?
- Joe626
- · Replies 1 ·
Block sliding down an incline plane with a cord connected to a cylinder.
- unrulypanda
- · Replies 1 ·
Harmonic motion of a bungee jumper
- Capncanada
- · Replies 16 ·