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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Finding the Velocity of a Spaceship Using Special Relativity
- cjkent
- · Replies 14 ·
Finger position on violin G-string to play note A
- jianghan
- · Replies 4 ·
Calculating Force and Torque on Electric Motor Coil
- gaimesh
- · Replies 1 ·
Normal force of weight on the ground
- sgstudent
- · Replies 4 ·
Energy of incident of light to amplitude of light?
- chewchun
- · Replies 1 ·
How Do You Calculate the Sound Intensity of Each Singer in a Choir?
- Tiba
- · Replies 1 ·
Why Is Deceleration on Landing More Than Just Gravity?
- yjstudent
- · Replies 15 ·
Deflection of electron beam in oscilloscope
- Blehs
- · Replies 1 ·
Equivalent Resistance: Simplifying Circuits with Symmetry
- stardust006
- · Replies 2 ·
Find the Total Current in a Single Loop Circuit
- Walley1
- · Replies 2 ·
Converting proton momentum from MeVc⁻¹ to SI units
- Peter G.
- · Replies 3 ·
Requesting (advice) and help on academic assignment.
- sick1
- · Replies 4 ·
Moment of Inertia of a Non-Uniform Rod?
- fisselt
- · Replies 18 ·
Special relativity spacecraft speed question
- alexmahone
- · Replies 5 ·
Acceleration of a proton in an electric field
- Walley1
- · Replies 2 ·
How much ice melts when a projectile is fired at it?
- Walley1
- · Replies 2 ·
How Does a Ball's Mass Affect Its Final Velocity After Colliding with a Plank?
- WannabeNewton
- · Replies 3 ·
How can I find the tension in a rope at equilibrium point on a high wire?
- foreignfishes
- · Replies 1 ·
Tried to find the acceleration by doing ma=mg-mkv^2
- XtremePhysX
- · Replies 13 ·
Thermodynamics - Pressure Question
- Icetray
- · Replies 4 ·
Possible friction force needed for a car on a banked curve
- coneheadceo
- · Replies 17 ·
Isobaric process; change in internal energy
- RJWills
- · Replies 5 ·
Finding Electric Field at r>= R with Four Point Charges
- bigplanet401
- · Replies 2 ·
Classical Mechanics: Forces on two cylinders
- Saennir
- · Replies 2 ·
Not your average car collision (very real life ) - no values supplied
- kjf123
- · Replies 1 ·
What's Happening on this Roller Coaster?
- Chevron
- · Replies 1 ·
What Are the Energy Transformations in a Car-Truck Collision?
- lo31415926535
- · Replies 3 ·
Heat Engines and Work: Combining Two Engines
- hockeybro12
- · Replies 2 ·
How Do You Calculate Bicep Tension and Elbow Joint Forces in Physics Problems?
- laddoo12
- · Replies 4 ·
Calculate the rate of energy output of the sun, taking the sun as a blackbody
- ninaw21
- · Replies 1 ·
What Factors Affect the Motion of a Toy Car Down a Slope?
- phzy
- · Replies 6 ·
Magnitude of magnetic flux of a solenoid using Biot-Savart law
- MorrowUoN
- · Replies 3 ·
Elastic collision between particle and rotating rod
- jhthorn
- · Replies 3 ·
Gravitational pull with the earth and moon
- alicia113
- · Replies 2 ·
SHM Mass Hanging on a Spring - Find velocity at given position in path
- kchurchi
- · Replies 12 ·
Rotational Dynamics about an axis parellel to the axis at the center of mass
- kchurchi
- · Replies 12 ·
Understanding Why a Rod Doesn't Rotate Around Its Center of Mass
- aaaa202
- · Replies 27 ·
How do I calculate the new speed given a doubled momentum?
- Peter G.
- · Replies 1 ·
Find sound wavelength from a vibrating string
- kchurchi
- · Replies 6 ·
Kinematics- police driver acceleration problem
- alicia113
- · Replies 11 ·
Pulley system (ideal pulley) Find the angle with vertical line
- thirteenheath
- · Replies 3 ·
Website showing Experimental Lab Reports
- ZedCar
- · Replies 1 ·
How Do You Convert Astronomical Units to Parsecs Using a Calculator?
- alannam
- · Replies 1 ·
Kinematcis, archer and his arrow
- alicia113
- · Replies 1 ·
How do I find the electric field of a charged strip of tape?
- sstefan1
- · Replies 1 ·
Angular momentum of this classical electron?
- solas99
- · Replies 10 ·
Checking impulse-momentum answers for parts c and d
- freshbox
- · Replies 38 ·
Force between two square configurations of point charges
- bigplanet401
- · Replies 5 ·
Solving for accelerations and tension from three coupled equations
- electron5
- · Replies 2 ·
What is special about the center of mass point?
- aaaa202
- · Replies 4 ·
Finding the height above a window after an object passes it
- needhelp10
- · Replies 3 ·
What must be the charge and placement of the third charge
- shashaeee
- · Replies 1 ·
Mechanics Problem (falling object)
- infke
- · Replies 2 ·
Determining Number of Electrons moving through a lamp.
- Dannytee
- · Replies 2 ·
Acceleration of a conducting bar on rails in a magnetic field
- nickmanc86
- · Replies 3 ·
How Much Power Does a Pump Need to Move Water from a Deep Hole?
- quark001
- · Replies 2 ·
Calculating Work and Energy in Electrostatic Systems
- hockeybro12
- · Replies 5 ·
How Does Gibbs' Phase Rule Limit the Number of Coexisting Phases in a System?
- RJWills
- · Replies 1 ·
Gravitational force of three objects on a fourth
- coneheadceo
- · Replies 11 ·
Non uniform circular acceleration
- hav0c
- · Replies 5 ·
Mechanical advantage and force analysis of complex pulley systems
- horace_focker
- · Replies 6 ·
Electric Fields and Protons: Solving for Time, Velocity, and Distance
- Knightycloud
- · Replies 5 ·
Impulsive force due to a falling chain
- vikvaryas1
- · Replies 2 ·
Finding a third force to balance two forces in 3D
- emmett92k
- · Replies 12 ·
Change in water height of a wave pool
- mexqwerty
- · Replies 4 ·
Potential energy and conservation
- lo31415926535
- · Replies 2 ·
Problem Understanding A Main Sequence Question:
- jguy
- · Replies 4 ·
Natural frequency, damping ratio and steady state amplitude for 3 kg mass on spring
- CovenK
- · Replies 1 ·
Static Equilibrium and magnitude
- emohabatzadeh
- · Replies 5 ·
Calculating thickness of a cast iron cylinder carrying pressure of 30Nmm^2
- joe465
- · Replies 2 ·
Equilibrium - Ladder against wall
- canicon25
- · Replies 2 ·
Calculate current/equivalence resistance of this circuit
- xyphr
- · Replies 15 ·
Radiation pressure force on Echo II satellite balloon
- zjmarlow
- · Replies 6 ·
Stick 2 Rotation: Finding Max Stability
- Knightycloud
- · Replies 3 ·
How Do You Calculate the Final Angular Velocity of a Spinning Top?
- Parzival
- · Replies 1 ·
Diffraction gratings - calculating the highest order maximum
- Marcargo
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Determine the electric field at the centre of the triangle
- shashaeee
- · Replies 9 ·
Dot products, show that r'.r''=0
- Ajax354
- · Replies 7 ·
3D Rigid body dynamics - Rod over rotating disk
- Quesadilla
- · Replies 1 ·
Heat engine- calculating minimum energy per cycle from hot reservoir
- twinklestar28
- · Replies 7 ·
Solving Charge in Conductors: Find Q1, Q2 & Combined Potential
- songoku
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How Many Meters Did You Win the Race By?
- jesusu2
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Friction force and maximum torque
- Acut
- · Replies 6 ·
Total entropy change for ice melting in a room
- plpg
- · Replies 4 ·
Why Does the Car Move When Pushing a Heavier Bus?
- Dramacon
- · Replies 3 ·
Nuclear Physics: Relationship between Radius of Nucleus And Mass Number
- Ruro
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What is the distance between the ship and the submarine using a laser?
- johnsy123
- · Replies 7 ·
Calculus problem concerning acceleration
- throneoo
- · Replies 13 ·
Diameter of circle of light seen from above water - illuminated beneath
- Marcargo
- · Replies 7 ·
Energy stored in coil with given relationship between current and flux
- Trip1
- · Replies 1 ·
How Does a Moving Pulley Affect Acceleration and Tension in a Mechanics Problem?
- BigCheese234
- · Replies 3 ·
Pressure difference between two bulbs measured by a mercury manometer
- Bane
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Why is the electric field zero inside a conducting shell?
- bigplanet401
- · Replies 1 ·
Why does relativistic velocity addition give 1c instead of 0.81c?
- Lynny
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Work and force: frictionless rollercoaster
- yvonne1313
- · Replies 4 ·
Calculating Doppler Shift for Radar Gun and Moving Ambulance
- mexqwerty
- · Replies 1 ·
Calculating Speed and Kinetic Energy in a Car Collision
- RachelT
- · Replies 8 ·
What Is the Speed of a Tennis Ball Dropped from 20m?
- RachelT
- · Replies 5 ·
Representation of the wave crests
- mexqwerty
- · Replies 1 ·
Calculate Factor of Safety for Steel Hanger w/ 550 MPa Strength
- walleye3
- · Replies 13 ·