Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Angular Momentum- Conserved or not?
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Irodov- 1.123- Simple conceptual question with two masses connected by a spring
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20
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2K
Vertical Circular motion- A confusing question
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29
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1K
Most probable velocity from Maxwell-Boltzmann distribution
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5
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934
Reconcile poundforce w/slug and lbmass
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25
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2K
Not a typical RL circuit...
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4
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935
Problem with pulleys - two fixed and one movable
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22
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2K
Is this an oversimplification? (treating a lens as a set of prisms)
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10
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940
Change in Displacement Formulation
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6
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896
Definition of pound force
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3
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779
Current through an inductor as a function of time
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10
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1K
A hanging ring carrying current in a uniform magnetic field
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10
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980
Flux through a cylindrical surface enclosing part of a sphere
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9
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2K
Specific heat capacity and latent heat
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2
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912
Calculating the Planck Length
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3
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948
Can a dipole be modeled as a point charge?
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10
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1K
Calculate the radius of gyration for a plane figure
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6
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800
Dynamics of Circular Motion
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12
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1K
Calculating acceleration of a prism and block connected to a wall through a rope and pulley
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4
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922
Block drifts off between two moving planes through friction
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21
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1K
The sign of the change in potential
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7
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959
How come violet, with the shortest wavelength, is refracted the most?
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3
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753
Calculating the time needed until a known velocity for a vehicle with friction as a function of velocity
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3
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869
Question About homework on Coulomb's Law
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8
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1K
Variable Mass system : Sand falling into a Freight car
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6
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925
Spherical conducting shell enclosing a non-conducting core
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5
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722
Concentric conducting cylinders
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7
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920
Slight Confusion in Introductory Mechanics (Dynamics Problem)
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15
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1K
The flux through a cylinder from a charge at the origin
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5
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903
Writing a vector parallel and normal to a unit vector ##\hat n##
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26
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2K
Equilibrium Position of a Hanging Candy Cane
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17
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2K
An interesting GCSE question: Why are electric lamps connected in parallel in house wiring?
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14
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796
LC oscillations - two capacitors and an inductor
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15
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1K
Angular motion of a car wheel traveling at certain speed
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12
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1K
5 charges within a square boundary
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7
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843
Newton's law of gravitation, energy and centre of mass question
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6
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787
Acceleration of an Electron in a Uniform Electric Field
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2
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710
Two charged spheres connected to walls by two springs
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7
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810
Measurement technology textbook problems
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1
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785
Ice Core Density Problem (Inspired by NEEM)
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6
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735
Finding the charge on pith balls
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9
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943
2D rigid body mechanics: force applied on sliding cart
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14
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1K
Cutting the Dose Rate in half with shielding
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5
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768
🔹RC Circuit with Series Capacitors — One Pre-Charged, One Uncharged
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11
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1K
Measurement technology textbook problems
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2
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707
What is the Final Temperature When Mixing Water and Ice, Assuming All Ice Melts?
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12
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1K
Projectile motion with ##N## bounces on the ground
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21
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1K
How to calculate freezing time for a moist food by-product (75% water)
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6
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1K
A lead bullet gets embedded in a lead block
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17
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847
Can the braking force be significantly greater than the force acting on the brake structure?
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25
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1K
Question on magnetism: Circular motion of charged particle in a Magnetic Field
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2
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34
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2K
A question about a wheel rolling without slipping while tied to a cube
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11
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1K
Thermally insulated container with alternating series of walls
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3K
Can somebody explain what is happening here? (sunlight refracting in Earth's atmosphere)
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12
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975
An exploding cannon shell
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4
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956
How to Calculate Amplitude Decrease in Damped Harmonic Motion After 10 Cycles?
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3
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903
Minimum angular velocity of a point mass on a rotating rod
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5
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922
Roller coaster mock Lab Report
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9
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939
Faraday's Law and magnetic flux
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3
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836
Physics exercise: Pressure in this Fresh Water Tank
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3
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794
Finding displacement from position time graph
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4
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813
Acceleration of beads on a ring
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5
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972
Rope between inclines with maximum length of hanging middle portion
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2
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6K
What is the derivation of the second equation for area velocity?
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3
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Find in terms of ##h## when ##P## comes instantaneously to rest
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A stone is dropped from an ascending balloon...
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10
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1K
Any Edexcel A Level Physics Teachers Here - Paper 1 Q13?
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13
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Coulomb’s Law Problem: Electrostatic Forces Between Charges
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6
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1K
Calculating flux through a plane cutting two concentric cylinders
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26
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2K
Identical cones rotating while in contact with each other
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12
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Ford Nucleon -- Fission Powered Car Calculation
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3
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779
Collision between snooker balls
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3
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972
Introductory Physics: Connection of Resistors ...
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15
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Friction on a spinning wheel when it is dropped onto the ground
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30
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2K
Frequency to wavelength question (thermal Doppler broadening)
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3
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963
Acceleration of a Block Sliding Down a Wedge
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3
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1K
Calculating velocity of a particle if distances are constant
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11
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1K
How to find motional emf w/o an equation for mag field?
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7
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829
Calculating the voltage across capacitors and resistors with switches
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2
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974
Find V-I characteristic for this circuit with ideal diode
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2
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2K
Purcell Electromagnetism p.301-303: "the longitudinal current I flows, in effect, on the cylinder itself"?
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1
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880
Acceleration of the midpoint of a light rod
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3
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1K
Work Done in slowly pulling a thread
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28
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Field of contact forces
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6
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Determine the Thevenin equivalent circuit
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2
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Angular Momentum Problem: Mouse walking on a rotating turntable
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5
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Earthing of two parallel conducting plates
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11
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1K
Purcell 1.77 Electron jelly
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2
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1K
How can voltage between unlike charges decrease with proximity?
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4
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975
Wave interference, "beats" problem
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2K
Aerodynamics of a helicopter blade
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4
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Which pairs of these diagrams represent equivalent circuits?
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4
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922
I want to know if the sketch I've drawn of the catenary suits the exercise
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11
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Trying to study for my exam but got stuck on exercise
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7
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Direction and magnitude of electric field produced by current change
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8
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Average battery current in battery charger
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7
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1K
Electrostatics: Gauss' Law Problem Finding the Flux through a Conducting Spherical Shell
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9
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2K
Questions about a capacitor with 4 parallel plates
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14
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1K
Drop of voltage between terminals while conductive rod is rotating
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5
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Motion puzzle: Bird flying between a train and a platform
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3
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