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.
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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660
Question About homework on Coulomb's Law
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8
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889
Variable Mass system : Sand falling into a Freight car
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6
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787
Spherical conducting shell enclosing a non-conducting core
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5
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616
Concentric conducting cylinders
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7
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797
Slight Confusion in Introductory Mechanics (Dynamics Problem)
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15
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955
The flux through a cylinder from a charge at the origin
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5
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580
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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1K
An interesting GCSE question: Why are electric lamps connected in parallel in house wiring?
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14
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653
LC oscillations - two capacitors and an inductor
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15
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815
Angular motion of a car wheel traveling at certain speed
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12
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981
5 charges within a square boundary
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7
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745
Newton's law of gravitation, energy and centre of mass question
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6
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670
Acceleration of an Electron in a Uniform Electric Field
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2
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606
Two charged spheres connected to walls by two springs
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7
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700
Measurement technology textbook problems
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1
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703
Ice Core Density Problem (Inspired by NEEM)
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6
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640
Finding the charge on pith balls
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9
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800
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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700
🔹RC Circuit with Series Capacitors — One Pre-Charged, One Uncharged
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11
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952
Measurement technology textbook problems
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2
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596
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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817
A lead bullet gets embedded in a lead block
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17
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762
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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920
Thermally insulated container with alternating series of walls
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2
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49
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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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892
An exploding cannon shell
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4
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857
How to Calculate Amplitude Decrease in Damped Harmonic Motion After 10 Cycles?
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3
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784
Minimum angular velocity of a point mass on a rotating rod
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5
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809
Roller coaster mock Lab Report
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9
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803
Faraday's Law and magnetic flux
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3
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750
Physics exercise: Pressure in this Fresh Water Tank
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3
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730
Finding displacement from position time graph
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4
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735
Acceleration of beads on a ring
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5
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861
Rope between inclines with maximum length of hanging middle portion
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2
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46
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3K
What is the derivation of the second equation for area velocity?
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3
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2K
Find in terms of ##h## when ##P## comes instantaneously to rest
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2
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36
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3K
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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1K
Coulomb’s Law Problem: Electrostatic Forces Between Charges
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6
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893
Calculating flux through a plane cutting two concentric cylinders
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26
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1K
Identical cones rotating while in contact with each other
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12
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1K
Ford Nucleon -- Fission Powered Car Calculation
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3
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724
Collision between snooker balls
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3
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844
Introductory Physics: Connection of Resistors ...
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15
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995
Friction on a spinning wheel when it is dropped onto the ground
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2
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30
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1K
Frequency to wavelength question (thermal Doppler broadening)
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3
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872
Working out the accelerations in a double Atwood pulley system
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22
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2K
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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770
Calculating the voltage across capacitors and resistors with switches
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2
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867
Find V-I characteristic for this circuit with ideal diode
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2
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1K
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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826
Acceleration of the midpoint of a light rod
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3
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906
Work Done in slowly pulling a thread
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28
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2K
Field of contact forces
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6
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1K
Determine the Thevenin equivalent circuit
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2
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2K
Angular Momentum Problem: Mouse walking on a rotating turntable
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5
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1K
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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943
How can voltage between unlike charges decrease with proximity?
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4
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855
Wave interference, "beats" problem
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19
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1K
Aerodynamics of a helicopter blade
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4
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1K
Which pairs of these diagrams represent equivalent circuits?
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4
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854
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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1K
Trying to study for my exam but got stuck on exercise
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7
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972
Direction and magnitude of electric field produced by current change
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8
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1K
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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956
Motion puzzle: Bird flying between a train and a platform
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3
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84
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5K
Debugging a Kelvin Water Dropper
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10
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2K
Electric displacement field density equation
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1
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906
Calculating of currents in a circuit
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2
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793
Force to move a 24 tonne truck one foot in one second
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10
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1K
Why does the propagation constant in the Helmholtz equation include j?
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3
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966
Record Player Physics
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7
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1K
Dielectric boundary value problems
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2
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875
Polarisation of dielectric materials
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5
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799
Capacitors, equipotentials, and electric fields
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5
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1K
How do you calculate the pull of this piston?
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27
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1K
Coin sliding on a table slides across an expanding fabric tape
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1
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767
Combined tensions of an RLC series circuit with AC current
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3
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963
Terminal velocity and acceleration
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7
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1K
Clarifying the Definition Total/Stagnation Pressure (p₀) in Bernoulli'
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1K
A particle's momentum in a magnetic field
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3
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1K
The energy needed to construct a charged hollow spherical shell with finite thickness
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1
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835
Calculation of charge flowing through a loop
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7
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961
Height of the image of my friend on the film
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2
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761
Why Was My Answer of 63 cm for the Focal Length of a Converging Lens Incorrect?
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1
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703
Drone dragging a hose behind it
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1K
Torque biomechanics
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6
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2K