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.
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Homework Help Guidelines for Students and Helpers
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Hey I posted in homework help but now it's gone
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Homework Help: Introductory Physics Formulary
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6
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Coulomb's force vs the Lorentz force
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21
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545
Speed of moth related to Doppler Effect
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8
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225
Struggling to make relation between elastic force and height
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11
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261
Correct statement about a reservoir with an outlet pipe
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21
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346
Correct statement about siphon used to empty water tank
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11
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264
Bullet collision question
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6
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158
Power of a thin lens in a medium is 1/fₘ or μₘ/fₘ ?
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16
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217
Confusion on sign convention in X-ray problems
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4
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129
Minimum height of water to make the particle visible
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4
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168
Ice cube in water: entropy calculation (Calorimetry)
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6
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143
Flux through a ring due to two charges
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10
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180
Static Mechanics: Aircraft Nosewheel Linkage Torque
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4
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166
Stacked blocks & pulley system
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7
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167
Voltmeter readings for this circuit with switches
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17
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311
Formula for Electromotive force?
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4
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157
Trying to understand the logic behind adding vectors with an angle between them
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14
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332
Rolling without slipping on a curved surface
2
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81
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A bead-mass oscillatory system problem
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13
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520
Problem about units conversion: cm^2 --> m^2
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4
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208
Correct statement about movement of curve ball in a fluid
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9
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152
Mechanics question: Three masses and a pulley on a tabletop
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3
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142
How to find eddy current (circular) path in this pendulum experiment?
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9
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198
Mechanics homework confusion
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2
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150
Why can I neglect angular momentum due to precession here?
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9
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379
Egg Drop Challenge! Need ideas for winning designs
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8
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268
Multiple reflections in a mirror system
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5
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127
How fast is the fly's shadow moving?
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11
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150
Struggling to understand the concept of this question (ice cube in water optics question)
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29
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348
Electromagnetic field theory -- Potential inside a conducting sphere
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9
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166
2 wires attached to another wire attached to a block
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9
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129
Phase relation between two waves
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4
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139
Understanding Forces and their Vector Components
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8
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280
I've come across another fluid pressure problem I don't understand
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43
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I need help making a relation between piezoelectricity and earthquake
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3
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149
Variable mass system : water sprayed into a moving container
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27
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484
What Determines the Minimum Mass of a Block in a Collision Scenario?
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4
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190
Adding and subtracting vectors using vector diagrams
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5
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170
Electric field due to charges between 2 parallel infinite planes
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9
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268
Sources for Physics Research Paper on Rotational Blade Motion on Helicopter
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4
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160
Spherical capacitor RC system -- determine steady state charges
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6
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214
Acceleration of a wedge: What forces act on the wedge?
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4
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350
What Determines the Minimum Mass of Block B for Movement on an Inclined Plane?
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22
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Why is the derivative of the potential at a surface assumed to be continuous even though there is surface charge?
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1
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191
Current through shorted branch -- clarification
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9
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210
Different way to find center of mass of Hollow hemisphere
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6
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203
Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations
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15
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251
Errors and significant figures
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25
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405
Collision of a bullet on a rod-string system: query
2
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71
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Explain this asphalt sheen
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10
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325
Can terminal velocity be determined from the information given?
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7
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264
A cylinder connected to a hanging mass
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21
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Compton shift problem
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9
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192
Atwood's with a cylinder - Rotational Motion
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13
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Help me to clear my doubt about a problem of Classical Mechanics (Car and Bicycle)
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6
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219
Tension in a string connecting two blocks having equal and opposite velocities
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21
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477
Physics Problem on Tension in Water
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19
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338
Physics Extended Essay about Gauss' law and/or Lorentz force
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4
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Toboggan on circular arcs
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12
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277
Will Y-Direction Motion Cease with X-Direction Acceleration Only?
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30
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650
Projectile problem: A block released from a balloon
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5
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229
Help on reflection of a wave from fixed end without transmission
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30
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531
Electric field due to arc shaped thin rod
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13
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291
Angular Momentum- Conserved or not?
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17
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507
Irodov- 1.123- Simple conceptual question with two masses connected by a spring
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20
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739
Vertical Circular motion- A confusing question
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29
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569
Most probable velocity from Maxwell-Boltzmann distribution
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5
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293
Reconcile poundforce w/slug and lbmass
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25
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504
Not a typical RL circuit...
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4
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302
Problem with pulleys - two fixed and one movable
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22
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502
Is this an oversimplification? (treating a lens as a set of prisms)
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10
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340
Change in Displacement Formulation
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6
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357
Definition of pound force
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3
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278
Current through an inductor as a function of time
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10
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472
A hanging ring carrying current in a uniform magnetic field
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10
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Flux through a cylindrical surface enclosing part of a sphere
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9
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636
Specific heat capacity and latent heat
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2
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389
Calculating the Planck Length
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3
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369
Can a dipole be modeled as a point charge?
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10
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616
Calculate the radius of gyration for a plane figure
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6
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386
Dynamics of Circular Motion
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12
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593
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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467
Block drifts off between two moving planes through friction
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21
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895
The sign of the change in potential
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7
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557
How come violet, with the shortest wavelength, is refracted the most?
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3
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375
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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441
Question About homework on Coulomb's Law
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8
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706
Variable Mass system : Sand falling into a Freight car
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6
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543
Spherical conducting shell enclosing a non-conducting core
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5
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477
Concentric conducting cylinders
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7
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680
Slight Confusion in Introductory Mechanics (Dynamics Problem)
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15
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817
The flux through a cylinder from a charge at the origin
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5
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482
Writing a vector parallel and normal to a unit vector ##\hat n##
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26
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Equilibrium Position of a Hanging Candy Cane
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17
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An interesting GCSE question: Why are electric lamps connected in parallel in house wiring?
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14
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562
LC oscillations - two capacitors and an inductor
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15
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683
Angular motion of a car wheel traveling at certain speed
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12
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873
5 charges within a square boundary
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7
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678
Newton's law of gravitation, energy and centre of mass question
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6
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624
Acceleration of an Electron in a Uniform Electric Field
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2
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567
Two charged spheres connected to walls by two springs
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7
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646