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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70K
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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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141K
Is it possible for a vertical rod balancing on a table to lose contact by striking the top of the rod?
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7
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848
Bernoulli vs real life experiment
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16
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1K
Which one is correct statement regarding lightning?
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9
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379
Cone on horizontal surface
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16
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988
Chain falling out of a horizontal tube onto a table
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4
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100
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5K
Curving of gravitational field lines
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7
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554
Earthed plates confusion
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2
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31
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1K
2 pulleys 3 masses problems
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8
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427
Force between two halves of a current carrying hollow cylinder
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3
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329
Two-layer dielectric, four-capacitor model vs three-capacitor model
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5
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448
Proof of law of sines using cross product
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10
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558
Magnetic field due to a coil wound on a hemsiphere
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6
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400
Falling capacitor connected to constant voltage
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3
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391
Decrease of amplitude in RLC circuit
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5
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593
Coulomb's force vs the Lorentz force
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29
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1K
Cone Rolling on Conical Surface Dynamics
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2
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391
Speed of moth related to Doppler Effect
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8
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599
Struggling to make relation between elastic force and height
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11
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563
Correct statement about a reservoir with an outlet pipe
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21
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661
Correct statement about siphon used to empty water tank
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11
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508
Bullet collision question
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6
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371
Power of a thin lens in a medium is 1/fₘ or μₘ/fₘ ?
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16
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512
Confusion on sign convention in X-ray problems
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4
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319
Minimum height of water to make the particle visible
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4
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430
Ice cube in water: entropy calculation (Calorimetry)
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6
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351
Flux through a ring due to two charges
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10
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504
Static Mechanics: Aircraft Nosewheel Linkage Torque
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4
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461
Stacked blocks & pulley system
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7
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428
Voltmeter readings for this circuit with switches
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17
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631
Formula for Electromotive force?
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4
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444
Trying to understand the logic behind adding vectors with an angle between them
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14
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606
Rolling without slipping on a curved surface
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3
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81
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2K
A bead-mass oscillatory system problem
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13
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780
Problem about units conversion: cm^2 --> m^2
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4
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443
Correct statement about movement of curve ball in a fluid
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9
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370
Mechanics question: Three masses and a pulley on a tabletop
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3
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346
How to find eddy current (circular) path in this pendulum experiment?
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9
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430
Mechanics homework confusion
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2
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360
Why can I neglect angular momentum due to precession here?
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9
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596
Egg Drop Challenge! Need ideas for winning designs
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8
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541
Multiple reflections in a mirror system
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5
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336
How fast is the fly's shadow moving?
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11
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359
Struggling to understand the concept of this question (ice cube in water optics question)
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29
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729
Electromagnetic field theory -- Potential inside a conducting sphere
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9
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389
2 wires attached to another wire attached to a block
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9
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307
Phase relation between two waves
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4
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360
Understanding Forces and their Vector Components
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8
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514
I've come across another fluid pressure problem I don't understand
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2
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43
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863
I need help making a relation between piezoelectricity and earthquake
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3
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326
Variable mass system : water sprayed into a moving container
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27
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762
What Determines the Minimum Mass of a Block in a Collision Scenario?
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4
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398
Adding and subtracting vectors using vector diagrams
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5
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385
Electric field due to charges between 2 parallel infinite planes
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9
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505
Sources for Physics Research Paper on Rotational Blade Motion on Helicopter
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4
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359
Spherical capacitor RC system -- determine steady state charges
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6
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426
Acceleration of a wedge: What forces act on the wedge?
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4
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569
What Determines the Minimum Mass of Block B for Movement on an Inclined Plane?
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22
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715
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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403
Current through shorted branch -- clarification
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9
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416
Different way to find center of mass of Hollow hemisphere
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6
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416
Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations
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15
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461
Errors and significant figures
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25
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725
Collision of a bullet on a rod-string system: query
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3
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71
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3K
Explain this asphalt sheen
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10
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521
Can terminal velocity be determined from the information given?
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7
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456
A cylinder connected to a hanging mass
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21
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808
Compton shift problem
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9
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400
Atwood's with a cylinder - Rotational Motion
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13
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1K
Help me to clear my doubt about a problem of Classical Mechanics (Car and Bicycle)
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6
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436
Tension in a string connecting two blocks having equal and opposite velocities
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21
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716
Physics Problem on Tension in Water
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19
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536
Physics Extended Essay about Gauss' law and/or Lorentz force
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4
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2K
Toboggan on circular arcs
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12
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497
Will Y-Direction Motion Cease with X-Direction Acceleration Only?
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1K
Projectile problem: A block released from a balloon
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5
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412
Help on reflection of a wave from fixed end without transmission
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2
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30
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851
Electric field due to arc shaped thin rod
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13
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474
Angular Momentum- Conserved or not?
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17
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734
Irodov- 1.123- Simple conceptual question with two masses connected by a spring
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20
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1K
Vertical Circular motion- A confusing question
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29
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790
Most probable velocity from Maxwell-Boltzmann distribution
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5
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487
Reconcile poundforce w/slug and lbmass
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25
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720
Not a typical RL circuit...
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4
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496
Problem with pulleys - two fixed and one movable
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22
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793
Is this an oversimplification? (treating a lens as a set of prisms)
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519
Change in Displacement Formulation
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6
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536
Definition of pound force
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3
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462
Current through an inductor as a function of time
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10
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702
A hanging ring carrying current in a uniform magnetic field
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10
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636
Flux through a cylindrical surface enclosing part of a sphere
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9
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858
Specific heat capacity and latent heat
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2
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571
Calculating the Planck Length
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3
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564
Can a dipole be modeled as a point charge?
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830
Calculate the radius of gyration for a plane figure
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6
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569
Dynamics of Circular Motion
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12
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797
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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660
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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756
How come violet, with the shortest wavelength, is refracted the most?
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3
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572
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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623