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.
Magnetic field outside a semi-infinite solenoid
  • Bling Fizikst
  • · Replies 12 ·
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12
An ambigious optical system with ambigious solutions [JEE Adv - 20`16]
  • BlazenHammer
  • · Replies 19 ·
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19
Lagrangian of a block on an inclined plane
  • member 731016
  • · Replies 16 ·
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16
Failed rocket problem (momentum conservation, Kleppner 4-4)
  • Michael Korobov
  • · Replies 3 ·
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3
Can a Falling Mass Generate 12V Using an Optimal Magnet and Coil?
  • pete94857
  • · Replies 9 ·
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9
Double pendulum Lagrangian using small angle approximation formula
  • member 731016
  • · Replies 5 ·
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5
Euler- Lagrange equation proof
  • member 731016
  • · Replies 2 ·
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2
Find temperature of a U-shaped Tube
  • hraghav
  • · Replies 9 ·
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9
How far do acorns drift in the wind?
  • nick-metersecondsq
  • · Replies 9 ·
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9
Rpm and power for this electric motor, gearbox and pulley system
  • doke
  • · Replies 19 ·
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19
Normalising the wavefunction - two answers
  • laser
  • · Replies 12 ·
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12
Relationship between linear velocity and angular velocity
  • good jelly
  • · Replies 7 ·
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7
Is the Solution for Rotation of Spherical Mirrors Incorrect?
  • Aurelius120
  • · Replies 16 ·
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16
How can I determine the instant the block overcomes static friction?
  • Thermofox
  • · Replies 61 ·
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61
General question about the definition of moment of force (Torque)
  • S_Subramaniam
  • · Replies 7 ·
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7
What's the pressure long before the fluid exits a pipe?
  • lost captain
  • · Replies 13 ·
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13
Oil enters a flexible bend in a pipe -- calculate the force needed to hold the bend in place
  • Aurelius120
  • · Replies 12 ·
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12
Induced charge on a conducting sphere sliced by a plane
  • Hellec408
  • · Replies 2 ·
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2
Time it Takes for a Transverse Pulse to Travel a Distance "L" Up a Cable Against Gravity?
  • domephilis
  • · Replies 13 ·
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13
Question about the current components inside the Corbino disk
  • AmanWithoutAscarf
  • · Replies 11 ·
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11
Pressure just before the exit hole in a draining tank
  • Conductivity
  • · Replies 7 ·
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7
Find the coefficient of friction between block and surface
  • shivu30198
  • · Replies 4 ·
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4
Block and wedge problem -- Where am I going wrong?
  • NTesla
  • · Replies 7 ·
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7
Potential Energy Problem: Pulling a Chain up onto a Table
  • Ascendant0
  • · Replies 3 ·
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3
What is the maximum length of the spring?
  • annnnnw
  • · Replies 4 ·
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4
Need some confirmation regarding induced currents
  • mymodded
  • · Replies 1 ·
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1
LASER Applications help please
  • Loyal bear
  • · Replies 4 ·
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4
Which movement has the greatest net work done?
  • songoku
  • · Replies 3 ·
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3
Calculate the area of this pond with functions given for the perimeter
  • tomwilliam
  • · Replies 2 ·
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2
Why are the electrostatic field lines normal to a charged conductor?
  • kirito
  • · Replies 10 ·
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10
Electric field of a sphere and a shell
  • kirito
  • · Replies 16 ·
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16
Rigid body dynamics: A rod with two masses rotates down from a horizontal starting position
  • MatinSAR
  • · Replies 21 ·
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21
Equivalent Resistance of Cube of Resistors: A to B
  • nil1996
  • · Replies 5 ·
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5
This question caused a debate in the class: EMF from a changing magnetic field
  • Physical_Fire
  • · Replies 7 ·
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7
Net force between two conducting strips
  • Bling Fizikst
  • · Replies 6 ·
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6
Is My Answer Correct for Calculating Average Current on a Ring?
  • songoku
  • · Replies 8 ·
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8
Correct Setup for Finite Difference to Calculate Quantum Tunneling
  • Tertius
  • · Replies 2 ·
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2
Confused about interefence patterns
  • sdfsfasdfasf
  • · Replies 16 ·
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16
Magnetization of a paramagnetic sphere
  • AmanWithoutAscarf
  • · Replies 11 ·
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11
Help with a Physics car project please
  • Dubskiehrye
  • · Replies 2 ·
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2
Solving projectile motion problems using Lagrangian mechanics
  • Melkor77
  • · Replies 9 ·
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9
What distance will be covered before coming to stop?
  • chwala
  • · Replies 12 ·
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12
Motor rotating at normal speed and then prevented from rotating
  • Guillem_dlc
  • · Replies 2 ·
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2
Force between charged particle and conducting cylinder
  • Bling Fizikst
  • · Replies 10 ·
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10
Tension in a deformed cylindrical bag on a surface
  • phantomvommand
  • · Replies 18 ·
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18
Finding the shape of a hanging rope
  • sap
  • · Replies 3 ·
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3
Two launches ferrying between two landing stations along a river
  • brotherbobby
  • · Replies 23 ·
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23
Calculate how fast the car was travelling when brakes were applied
  • chwala
  • · Replies 1 ·
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1
Contact Mechanics: Deformation of a ball on a surface
  • phantomvommand
  • · Replies 3 ·
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3
How to calculate the velocity of water streaming into the boat?
  • Lotto
  • · Replies 19 ·
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19
Difficulty Understanding 'Drag Crisis' (transitionary period from laminar to turbulent flow)
  • lebronJames24
  • · Replies 1 ·
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1
Issues with SLS Model for Rubber and Foam Compression Tests
  • joshwarner
  • · Replies 5 ·
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5
Stress on a spaghetti rod balanced from its middle
  • phantomvommand
  • · Replies 6 ·
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6
How to calculate the degrees of freedom of a simple multi-body system?
  • davidoux2020
  • · Replies 5 ·
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5
What Force must be exerted on the trolley for constant speed?
  • chwala
  • · Replies 1 ·
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1
Two objects joined by a rectilinear cable rotating
  • Guillem_dlc
  • · Replies 8 ·
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8
Oscillation of system of three charges
  • Bling Fizikst
  • · Replies 8 ·
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8
Bees and Trains: A distance problem
  • putongren
  • · Replies 19 ·
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19
Extension of spring in a system with two pistons
  • Bling Fizikst
  • · Replies 16 ·
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16
Classical Mechanics: Rocket Propulsion Calculation
  • I_Try_Math
  • · Replies 10 ·
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10
Missing negative sign in my textbook's answer?
  • mymodded
  • · Replies 1 ·
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1
Spaceship, Earth and proton problem in special relativity
  • member 731016
  • · Replies 12 ·
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12
Quantum - Postulate of getting specific momentum p = |A_p|^2
  • laser
  • · Replies 7 ·
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7
Effect of temperature on surface tension
  • AmanWithoutAscarf
  • · Replies 2 ·
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2
Need maximum weight on an extension machine
  • idontknoww
  • · Replies 2 ·
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2
Finding a formula for displacement of a mass on a spring using v.
  • hamishmidd
  • · Replies 2 ·
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2
Correct Derivation of the Adiabatic Condition? (PV Diagram)
  • PhDeezNutz
  • · Replies 4 ·
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4
An "x" from nowhere, mistake by textbook? (induced voltages)
  • mymodded
  • · Replies 2 ·
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2
Shape of equipotential surface in 3d
  • Lochikilebor
  • · Replies 5 ·
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A problem in this photoelectric effect experiment
  • JACKR
  • · Replies 8 ·
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8
Problem in understanding angular momentum of a rigid body
  • MatinSAR
  • · Replies 10 ·
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10
Shape of Slinky being twirled in 0 gravity
  • phantomvommand
  • · Replies 4 ·
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4
Two Trains and a Bee: Distance Question
  • putongren
  • · Replies 3 ·
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3
A falling resistive disk in uniform magnetic field
  • AmanWithoutAscarf
  • · Replies 17 ·
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17
How can I maximise the exit velocity of an object catapulted up?
  • barondress
  • · Replies 4 ·
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4
Which block reaches the wall faster?
  • MathVoider
  • · Replies 2 ·
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2
Is this a mistake in my textbook's answer about induced voltage question?
  • mymodded
  • · Replies 1 ·
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1
Horizontal component of the Coriolis force
  • MatinSAR
  • · Replies 2 ·
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2
Flux linking (and de-linking?)
  • sdfsfasdfasf
  • · Replies 6 ·
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6
Force on a rotating wheel/disc
  • Buckethat_fisherlad
  • · Replies 25 ·
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25
Magnus Effect Equations and Mechanics
  • lebronJames24
  • · Replies 12 ·
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12
Forces involved in principle of virtual work
  • phantomvommand
  • · Replies 2 ·
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2
Absolute motion analysis of pulley-spring system
  • bremenfallturm
  • · Replies 10 ·
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10
Lagrangian for a rod pivoting at the end of a clock hand
  • member 731016
  • · Replies 5 ·
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5
Electric field external to Conducting Hollow Sphere with charge inside
  • curious_mind
  • · Replies 23 ·
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23
Lorentz force and induced electric field
  • AmanWithoutAscarf
  • · Replies 6 ·
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6
Please explain this suggested solution for the field inside a charged hollow sphere
  • tellmesomething
  • · Replies 17 ·
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17
Deriving a formula for KE (rolling + projection)
  • foreverlostinclass
  • · Replies 2 ·
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2
Simple Static 3-Particle Model
  • aasnrsd
  • · Replies 2 ·
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2
I am confused about air density/drag
  • sdfsfasdfasf
  • · Replies 12 ·
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12
Problem about non-inertial reference frame
  • MatinSAR
  • · Replies 8 ·
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8
How to calculate the force exerted by the "tendon" on the "tibia" bone?
  • Iwawa48
  • · Replies 4 ·
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4
Range of an object launched on a downward hill
  • phantomvommand
  • · Replies 12 ·
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12
Resistance of three-dimensional objects
  • Jan05
  • · Replies 10 ·
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10
How to understand typo in MIT OCW chapter on Poynting vector?
  • zenterix
  • · Replies 4 ·
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4
What does having 3d symmetry 2d symmetry and 1d symmetry mean?
  • tellmesomething
  • · Replies 36 ·
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Spaceship length contraction problem
  • member 731016
  • · Replies 4 ·
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4
Measuring Acceleration on a Bike using Phyphox
  • luciaalmiron
  • · Replies 33 ·
2
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How does an eddy current brake work exactly?
  • zenterix
  • · Replies 2 ·
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2
what the relation between the amplitude magnitude and mass at resonance?
  • kirito
  • · Replies 5 ·
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5