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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A rod sliding/falling down on a frictionless horizontal plane
- Sam Jelly
- · Replies 8 ·
Why is a 1d conservative force approximately linearly related to position?
- zenterix
- · Replies 3 ·
Finding magnetic field using Ampere's Circuital Law
- arham_jain_hsr
- · Replies 5 ·
Is My Understanding of Accelerations in Irodov 1.258 Correct?
- adjurovich
- · Replies 14 ·
Two masses connected by Pulley - Lagrangian problem
- member 731016
- · Replies 6 ·
Trying to Calculate Initial Velocity and Final Velocity
- rosephysics
- · Replies 2 ·
Colour depends on wavelength or frequency?
- NTesla
- · Replies 22 ·
Magnetic field outside a semi-infinite solenoid
- Bling Fizikst
- · Replies 12 ·
An ambigious optical system with ambigious solutions [JEE Adv - 20`16]
- BlazenHammer
- · Replies 19 ·
Lagrangian of a block on an inclined plane
- member 731016
- · Replies 16 ·
Failed rocket problem (momentum conservation, Kleppner 4-4)
- Michael Korobov
- · Replies 3 ·
Can a Falling Mass Generate 12V Using an Optimal Magnet and Coil?
- pete94857
- · Replies 9 ·
Double pendulum Lagrangian using small angle approximation formula
- member 731016
- · Replies 5 ·
Euler- Lagrange equation proof
- member 731016
- · Replies 2 ·
Find temperature of a U-shaped Tube
- hraghav
- · Replies 9 ·
How far do acorns drift in the wind?
- nick-metersecondsq
- · Replies 9 ·
Rpm and power for this electric motor, gearbox and pulley system
- doke
- · Replies 19 ·
Normalising the wavefunction - two answers
- laser
- · Replies 12 ·
Relationship between linear velocity and angular velocity
- good jelly
- · Replies 7 ·
Is the Solution for Rotation of Spherical Mirrors Incorrect?
- Aurelius120
- · Replies 16 ·
How can I determine the instant the block overcomes static friction?
- Thermofox
- · Replies 61 ·
What does moment of force measure about a door's rotation?
- S_Subramaniam
- · Replies 7 ·
What's the pressure long before the fluid exits a pipe?
- lost captain
- · Replies 13 ·
Oil enters a flexible bend in a pipe -- calculate the force needed to hold the bend in place
- Aurelius120
- · Replies 12 ·
Induced charge on a conducting sphere sliced by a plane
- Hellec408
- · Replies 2 ·
Time it Takes for a Transverse Pulse to Travel a Distance "L" Up a Cable Against Gravity?
- domephilis
- · Replies 13 ·
Circular current in a Corbino disk with magnetic field
- AmanWithoutAscarf
- · Replies 11 ·
Pressure just before the exit hole in a draining tank
- Conductivity
- · Replies 7 ·
Find the coefficient of friction between block and surface
- shivu30198
- · Replies 4 ·
Block and wedge problem -- Where am I going wrong?
- NTesla
- · Replies 7 ·
Potential Energy Problem: Pulling a Chain up onto a Table
- Ascendant0
- · Replies 3 ·
What is the maximum length of the spring?
- annnnnw
- · Replies 4 ·
Need some confirmation regarding induced currents
- mymodded
- · Replies 1 ·
Laser properties enabling holography, cutting, and telecommunications
- Loyal bear
- · Replies 4 ·
Which movement has the greatest net work done?
- songoku
- · Replies 3 ·
Calculate the area of this pond with functions given for the perimeter
- tomwilliam
- · Replies 2 ·
Why are the electrostatic field lines normal to a charged conductor?
- kirito
- · Replies 10 ·
Electric field of a sphere and a shell
- kirito
- · Replies 16 ·
Inertia tensor for rod with two point masses rotating about fixed axis
- MatinSAR
- · Replies 21 ·
Equivalent Resistance of Cube of Resistors: A to B
- nil1996
- · Replies 5 ·
EMF induced by changing magnetic field
- Physical_Fire
- · Replies 7 ·
Net force between two conducting strips
- Bling Fizikst
- · Replies 6 ·
Is My Answer Correct for Calculating Average Current on a Ring?
- songoku
- · Replies 8 ·
Correct Setup for Finite Difference to Calculate Quantum Tunneling
- Tertius
- · Replies 2 ·
Vertically polarized microwave interference pattern rotation about line AB
- sdfsfasdfasf
- · Replies 16 ·
Magnetization of a paramagnetic sphere
- AmanWithoutAscarf
- · Replies 11 ·
Wingnut brake mechanism shifting instead of stopping threaded rod
- Dubskiehrye
- · Replies 2 ·
Solving projectile motion problems using Lagrangian mechanics
- Melkor77
- · Replies 9 ·
What distance will be covered before coming to stop?
- chwala
- · Replies 12 ·
Motor rotating at normal speed and then prevented from rotating
- Guillem_dlc
- · Replies 2 ·
Force between charged particle and conducting cylinder
- Bling Fizikst
- · Replies 10 ·
Tension in a deformed cylindrical bag on a surface
- phantomvommand
- · Replies 18 ·
Finding the shape of a hanging rope
- sap
- · Replies 3 ·
Two launches ferrying between two landing stations along a river
- brotherbobby
- · Replies 23 ·
Calculate how fast the car was travelling when brakes were applied
- chwala
- · Replies 1 ·
Contact Mechanics: Deformation of a ball on a surface
- phantomvommand
- · Replies 3 ·
How to calculate the velocity of water streaming into the boat?
- Lotto
- · Replies 19 ·
Difficulty Understanding 'Drag Crisis' (transitionary period from laminar to turbulent flow)
- lebronJames24
- · Replies 1 ·
Issues with SLS Model for Rubber and Foam Compression Tests
- joshwarner
- · Replies 5 ·
Stress on a spaghetti rod balanced from its middle
- phantomvommand
- · Replies 6 ·
How to calculate the degrees of freedom of a simple multi-body system?
- davidoux2020
- · Replies 5 ·
What Force must be exerted on the trolley for constant speed?
- chwala
- · Replies 1 ·
Two objects joined by a rectilinear cable rotating
- Guillem_dlc
- · Replies 8 ·
Oscillation of system of three charges
- Bling Fizikst
- · Replies 8 ·
Finding the general equation for a bee flying between two trains
- putongren
- · Replies 19 ·
Extension of spring in a system with two pistons
- Bling Fizikst
- · Replies 16 ·
Rocket propulsion problem: getting 1600 kg instead of 1551 kg
- I_Try_Math
- · Replies 10 ·
Missing negative sign in my textbook's answer?
- mymodded
- · Replies 1 ·
Spaceship, Earth and proton problem in special relativity
- member 731016
- · Replies 12 ·
Quantum - Postulate of getting specific momentum p = |A_p|^2
- laser
- · Replies 7 ·
Effect of temperature on surface tension
- AmanWithoutAscarf
- · Replies 2 ·
Need maximum weight on an extension machine
- idontknoww
- · Replies 2 ·
Finding a formula for displacement of a mass on a spring using v.
- hamishmidd
- · Replies 2 ·
Correct Derivation of the Adiabatic Condition? (PV Diagram)
- PhDeezNutz
- · Replies 4 ·
An "x" from nowhere, mistake by textbook? (induced voltages)
- mymodded
- · Replies 2 ·
Shape of equipotential surface in 3d
- Lochikilebor
- · Replies 5 ·
A problem in this photoelectric effect experiment
- JACKR
- · Replies 8 ·
Problem in understanding angular momentum of a rigid body
- MatinSAR
- · Replies 10 ·
Shape of Slinky being twirled in 0 gravity
- phantomvommand
- · Replies 4 ·
Two Trains and a Bee: Distance Question
- putongren
- · Replies 3 ·
A falling resistive disk in uniform magnetic field
- AmanWithoutAscarf
- · Replies 17 ·
How can I maximise the exit velocity of an object catapulted up?
- barondress
- · Replies 4 ·
Which block reaches the wall faster?
- MathVoider
- · Replies 2 ·
Induced voltage in nested solenoids: does the answer include turns correctly?
- mymodded
- · Replies 1 ·
Horizontal component of the Coriolis force
- MatinSAR
- · Replies 2 ·
Flux linking (and de-linking?)
- sdfsfasdfasf
- · Replies 6 ·
Force on a rotating wheel/disc
- Buckethat_fisherlad
- · Replies 25 ·
Magnus Effect Equations and Mechanics
- lebronJames24
- · Replies 12 ·
Forces involved in principle of virtual work
- phantomvommand
- · Replies 2 ·
Absolute motion analysis of pulley-spring system
- bremenfallturm
- · Replies 10 ·
Lagrangian for a rod pivoting at the end of a clock hand
- member 731016
- · Replies 5 ·
Electric field external to Conducting Hollow Sphere with charge inside
- curious_mind
- · Replies 23 ·
Lorentz force and induced electric field
- AmanWithoutAscarf
- · Replies 6 ·
Electric field in a cavity of a charged sphere using superposition
- tellmesomething
- · Replies 17 ·
Deriving a formula for KE (rolling + projection)
- foreverlostinclass
- · Replies 2 ·
Simple Static 3-Particle Model
- aasnrsd
- · Replies 2 ·
Why does lower air density at altitude increase max speed?
- sdfsfasdfasf
- · Replies 12 ·
Problem about non-inertial reference frame
- MatinSAR
- · Replies 8 ·
How to calculate the force exerted by the "tendon" on the "tibia" bone?
- Iwawa48
- · Replies 4 ·
Range of an object launched on a downward hill
- phantomvommand
- · Replies 12 ·