Introductory Physics Homework Help Forum

Post thread
Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Ion moving through electric potential difference and magnetic field
  • zenterix
  • · Replies 8 ·
Replies
8
Direction of travel of a plane wave given direction of electric field
  • zenterix
  • · Replies 8 ·
Replies
8
How is centripetal force involved here? (charged mass sliding down a conducting hemisphere)
  • tellmesomething
  • · Replies 31 ·
2
Replies
31
Mathematical representation of a pulse on a rope
  • zenterix
  • · Replies 9 ·
Replies
9
Is This a Series or Parallel Circuit?
  • bmarc92
  • · Replies 13 ·
Replies
13
Planet moving in elliptical orbit around a star
  • songoku
  • · Replies 13 ·
Replies
13
Why can we add impedances in series?
  • zenterix
  • · Replies 4 ·
Replies
4
How to understand the direction of tension in a charged closed ring?
  • tellmesomething
  • · Replies 11 ·
Replies
11
Internal energy of a gas and kinetic energy, "typical velocity"
  • laser
  • · Replies 5 ·
Replies
5
Damped harmonic oscillation
  • NTesla
  • · Replies 64 ·
3
Replies
64
Question on mirror and lens combinations
  • BlueCerealBox
  • · Replies 2 ·
Replies
2
Find the direction and the magnitude of Frictional force
  • chwala
  • · Replies 3 ·
Replies
3
Shortest distance along the shore and into the lake
  • brotherbobby
  • · Replies 6 ·
Replies
6
Magnitude of magnetic field at different points near a capacitor.
  • zenterix
  • · Replies 6 ·
Replies
6
How to find voltage across capacitor in RLC circuit?
  • zenterix
  • · Replies 3 ·
Replies
3
Vertical circular motion
  • sdfsfasdfasf
  • · Replies 8 ·
Replies
8
Can Geiger Counter Ticks be converted into particle/wave counts?
  • kvidtr
  • · Replies 12 ·
Replies
12
Kinematics: Acceleration of a figure skater changing direction
  • phantomvommand
  • · Replies 16 ·
Replies
16
Find the electric field at a point in 3 dimensional space
  • tellmesomething
  • · Replies 50 ·
2
Replies
50
The electric potential inside a conducting sphere with charge Q
  • j04015
  • · Replies 11 ·
Replies
11
X and Y coordinates of an oscillating object on a spring.
  • phantomvommand
  • · Replies 3 ·
Replies
3
Simultaneous events separated by distance and time
  • member 731016
  • · Replies 5 ·
Replies
5
Finding speed of spaceship traveling to star ##a## light years away
  • member 731016
  • · Replies 8 ·
Replies
8
Stationary observer meaning in relativity problem
  • member 731016
  • · Replies 14 ·
Replies
14
Particle moving at speed ##bc## relative to laboratory frame
  • member 731016
  • · Replies 20 ·
Replies
20
Why Doesn't Time Dilation Affect Pendulum Observations on a Moving Train?
  • member 731016
  • · Replies 8 ·
Replies
8
Two cyclists ride between a pair of towns with and against the wind
  • brotherbobby
  • · Replies 17 ·
Replies
17
Universal gravitation’s problem -- Balancing gravitational forces from 2 masses
  • Riccardo Finessi
  • · Replies 3 ·
Replies
3
Prove that the field due to a circular arc is same as its bounded tangent at the centre of curvature
  • tellmesomething
  • · Replies 23 ·
Replies
23
Experimenting whether the diameter of a pot affects boiling time for water
  • swnsy05
  • · Replies 15 ·
Replies
15
How to obtain amplitude of current in parallel RLC circuit?
  • zenterix
  • · Replies 3 ·
Replies
3
Uniform Motion in 2D - A man chasing a bus
  • brotherbobby
  • · Replies 20 ·
Replies
20
Understanding the generic nature of linearity in Physics
  • zenterix
  • · Replies 2 ·
Replies
2
Ap physics 1 velocity center of mass question
  • ldkdkdjdj
  • · Replies 4 ·
Replies
4
Self-inductance of LC circuit given rate of capacitor discharge.
  • zenterix
  • · Replies 6 ·
Replies
6
Formula for the average EMF of generator
  • songoku
  • · Replies 6 ·
Replies
6
Calculation of current in driven series RLC circuit
  • zenterix
  • · Replies 8 ·
Replies
8
Magnetic energy density, self-inductance of coaxial cylindrical shells
  • zenterix
  • · Replies 10 ·
Replies
10
Test question: What is true for a mechanical impact?
  • bremenfallturm
  • · Replies 7 ·
Replies
7
Find work given two conservative forces and a nonconservative force
  • bremenfallturm
  • · Replies 9 ·
Replies
9
Two candles making shadows of one another on opposite walls
  • brotherbobby
  • · Replies 3 ·
Replies
3
Atmospheric pressure and water pressure - Boyle's law
  • laser
  • · Replies 6 ·
Replies
6
Confused about how forces in a pulley balance
  • sdfsfasdfasf
  • · Replies 6 ·
Replies
6
A vertical U tube rotates about the vertical axis -- Find omega to cause this height offset
  • Aurelius120
  • · Replies 15 ·
Replies
15
IPHO classical mechanics: A mass falls on an exoplanet
  • TanWu
  • · Replies 2 ·
Replies
2
Electric field & force due to charged insulating hemispherical shells
  • Aurelius120
  • · Replies 12 ·
Replies
12
Induction heat flux density induced by wire in a slab
  • AntonAv
  • · Replies 0 ·
Replies
0
Non-Uniform Magnetic Field Calculations
  • Lachlan
  • · Replies 9 ·
Replies
9
Power Radiated From a Copper Cube
  • Randomized10
  • · Replies 3 ·
Replies
3
Modelling a metal detector using eddy currents from Non-Destructive Testing
  • Sh_lm
  • · Replies 1 ·
Replies
1
Forces on Elliptical Current Carying Loop
  • StoyanNikolov
  • · Replies 10 ·
Replies
10
Friction Required for Billiard Ball to Roll without Slipping
  • domephilis
  • · Replies 60 ·
3
Replies
60
How to find the potential of a field that has regions of non-zero curl
  • kated
  • · Replies 3 ·
Replies
3
Sound Wave Diagram Help
  • newtonphysics
  • · Replies 12 ·
Replies
12
Determine the velocity of the Slider
  • Northbysouth
  • · Replies 5 ·
Replies
5
Building a Marble Catapult
  • bananamanz
  • · Replies 3 ·
Replies
3
Gauge pressure due to a floating body
  • brotherbobby
  • · Replies 4 ·
Replies
4
Sign conventions for Kirchhoff's loop rule
  • Meow12
  • · Replies 7 ·
Replies
7
Resistance force changing the velocity of an object
  • highschoolstudent454
  • · Replies 8 ·
Replies
8
Thermodynamics: Cooling of a heated block of iron in contact with air
  • walterminator
  • · Replies 29 ·
Replies
29
Work done by power supply to maintain a constant current
  • mymodded
  • · Replies 0 ·
Replies
0
Unit vectors that change as a function of time
  • tragtf
  • · Replies 13 ·
Replies
13
Electric field at a point inside a non-uniformly charged sphere
  • Necrolunatic
  • · Replies 6 ·
Replies
6
Looking for data about different types of carbon fiber chemical properties
  • GoldRemove9500
  • · Replies 2 ·
Replies
2
Angular momentum conservation on a merry-go-round
  • kirito
  • · Replies 5 ·
Replies
5
Power dissipated over 1 cycle of a AC source-free RLC series circuit?
  • testobesto
  • · Replies 6 ·
Replies
6
Angular momentum for a bullet and a rod attached to a ceiling
  • kirito
  • · Replies 17 ·
Replies
17
Force Between 2 Coaxial Current-Carrying Loops
  • KittyKinkle02
  • · Replies 4 ·
Replies
4
How Long for a Beam of Light to Reach Earth?
  • felizgu
  • · Replies 21 ·
Replies
21
Particle confined in 3D box - quantum states
  • greg997
  • · Replies 5 ·
Replies
5
How to Calculate θ3 After Finding θ2 Using Snell's Law?
  • betterscientist
  • · Replies 9 ·
Replies
9
Electric field vector equation: Finding the neutral point for two charges
  • tellmesomething
  • · Replies 35 ·
2
Replies
35
Find number of microstates of combined system
  • MatinSAR
  • · Replies 22 ·
Replies
22
Experiment measuring the distance dependence of a suspended metal bolt from a magnet
  • Sidsid
  • · Replies 13 ·
Replies
13
Induction confusion for induced charge inside a metal conductor
  • tellmesomething
  • · Replies 23 ·
Replies
23
Significant figures doubt
  • ysh123
  • · Replies 3 ·
Replies
3
What would the slope of the force between 2 charged particles vs 1/r^2 give me?
  • dannolul
  • · Replies 1 ·
Replies
1
Gauss' law and the potential V (plane layer case)
  • srnixo
  • · Replies 7 ·
Replies
7
Water flowing out of a rotating vessel
  • Bling Fizikst
  • · Replies 30 ·
2
Replies
30
Using Kepler's laws to calculate elliptical planetary motion
  • kirito
  • · Replies 7 ·
Replies
7
Help with Friction Forces: Box resting on a board on a frictionless surface
  • alomari
  • · Replies 5 ·
Replies
5
What is the unknown circuit element in RLC circuit given plot of V, I?
  • zenterix
  • · Replies 4 ·
Replies
4
Find at what rate the orbit radius will grow
  • jaksa
  • · Replies 30 ·
2
Replies
30
Initial velocity of rolling ball
  • Siraaj
  • · Replies 2 ·
Replies
2
Did my textbook make a mistake when writing these units?
  • mymodded
  • · Replies 5 ·
Replies
5
Fresnel Lens - Solve for Lithography & Power
  • Schreiber__
  • · Replies 0 ·
Replies
0
Physics about electric circuits: Changing the resistors changes the currents
  • blesssid
  • · Replies 3 ·
Replies
3
Thermodynamic Work vs Mechanical Work
  • neil123
  • · Replies 3 ·
Replies
3
Classic Incline problem with cylinder
  • member 731016
  • · Replies 13 ·
Replies
13
Using conservation of energy and momentum in projectile motion
  • MatinSAR
  • · Replies 18 ·
Replies
18
Torque calculation of CV joint
  • Gozupa
  • · Replies 2 ·
Replies
2
Lagrange equation for block and incline
  • member 731016
  • · Replies 13 ·
Replies
13
Fundamental quantities and derived quantities
  • Manish_529
  • · Replies 5 ·
Replies
5
Projectile Motion Problem Involving Initial Velocity and Gravity Only
  • Ascendant0
  • · Replies 11 ·
Replies
11
Cart sliding along horizontal with spring connected
  • member 731016
  • · Replies 11 ·
Replies
11
Does the voltage across a battery include its internal resistance?
  • laser
  • · Replies 8 ·
Replies
8
Calculate electric force using Coulomb's law (vector components are the struggle)
  • potatogirl
  • · Replies 3 ·
Replies
3
Two tourists and a bicycle - uniform motion
  • brotherbobby
  • · Replies 25 ·
Replies
25
How many people can be on the raft?
  • lgeorge
  • · Replies 10 ·
Replies
10
Find the magnetic induction vector
  • LinguaBrous
  • · Replies 3 ·
Replies
3