Introductory Physics Homework Help Forum

Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.

Threads

What is the equilibrium distance between atoms in a two-atom molecule?

  • getty102
  • · Replies 5 ·
Replies
5

Solving for Potential Difference Between (4,6,3) and (8,1,6)

  • grtdane17
  • · Replies 2 ·
Replies
2

Work Energy Theorem with Kinetic Friction and External Work

  • kc0ldeah
  • · Replies 7 ·
Replies
7

Frictional forces between two blocks (one over the other)

  • Hernaner28
  • · Replies 11 ·
Replies
11

Solid cylinder rolling down a ramp without slipping

  • eagles12
  • · Replies 9 ·
Replies
9

Thin ring rolling down a moving ramp

  • darkdraggy
  • · Replies 3 ·
Replies
3

Finding tension in string A for a crane with torque equilibrium

  • PeachBanana
  • · Replies 3 ·
Replies
3

Find Aphelion of an elliptical orbit given Perihelion and Orbital Period

  • Plebert
  • · Replies 1 ·
Replies
1

Force on 3 current carrying wires

  • jmr423
  • · Replies 3 ·
Replies
3

How do you organize written solutions to physics problems?

  • annalise17
  • · Replies 2 ·
Replies
2

How Is Kinetic Energy Calculated in a Rolling Sphere on a Ramp?

  • eagles12
  • · Replies 8 ·
Replies
8

Direction of frictional force in a bicycle

  • devvaibhav
  • · Replies 8 ·
Replies
8
Replies
6

How Does Grounding Affect Charge Distribution on a Conductor?

  • Saitama
  • · Replies 9 ·
Replies
9

Voltage drop across a battery, a capacitor and 2 light bulbs

  • Sephonet
  • · Replies 5 ·
Replies
5

AC circuit with two components given phase angle

  • Hyperfluxe
  • · Replies 1 ·
Replies
1

How Do You Calculate Amplitude and Time Period in SHM Problems?

  • Saitama
  • · Replies 16 ·
Replies
16

Calculating Velocity in Circular Motion

  • mccarthyp64
  • · Replies 6 ·
Replies
6

Moment of inertia of wheel lifting a block via string

  • eagles12
  • · Replies 5 ·
Replies
5

When to use ωxr versus rxω in vector cross products?

  • Icetray
  • · Replies 2 ·
Replies
2

How Do You Calculate the Kinetic Energy of a Rotating CD?

  • eagles12
  • · Replies 13 ·
Replies
13
Replies
12

Charged Particle Moving in Magnetic Field

  • Gavandeshaq
  • · Replies 2 ·
Replies
2

A current-carrying circular loop placed next to a long straight wire

  • longcatislong
  • · Replies 1 ·
Replies
1

Dropping marble in space station riddle

  • PaulMuaddid
  • · Replies 13 ·
Replies
13

Spectrometer Operation Analysis

  • tinklefairy6
  • · Replies 2 ·
Replies
2

Why Does io'' Equal Zero in Parallel Resistor Circuits?

  • kougou
  • · Replies 10 ·
Replies
10

Find Stretched Length of Spring - 8.5kg Board at 50°

  • rasputin66
  • · Replies 3 ·
Replies
3

Why are gases more viscous at higher temps?

  • chiddler
  • · Replies 3 ·
Replies
3

What Force Acts on a Marble at Point Q in a Loop-the-Loop?

  • slk011
  • · Replies 10 ·
Replies
10

Spring constant with equal max velocity and 3:1 amplitude ratio

  • rasputin66
  • · Replies 2 ·
Replies
2

Conservation of momentum lab with smart pulley and two carts

  • dani123
  • · Replies 5 ·
Replies
5

Centripetal Force - maxium downforce for no skidding

  • jsmith613
  • · Replies 19 ·
Replies
19

Resistance of spheroid like object

  • pugtm
  • · Replies 10 ·
Replies
10
  • Poll Poll

Find work given mass, acceleration, and time.

  • Gshaq Pierre
  • · Replies 2 ·
Replies
2

Dropping a penny off a skyscraper.

  • btpolk
  • · Replies 14 ·
Replies
14

Velocity of CM of Rod if struck below CM ?

  • sweetpete28
  • · Replies 10 ·
Replies
10

Finding distance and direction from Lake B to base camp using vectors

  • blob84
  • · Replies 2 ·
Replies
2

Rot. + Trans. Motion: Conservation of E

  • sweetpete28
  • · Replies 2 ·
Replies
2

Why potential energy alone, not kinetic energy?

  • logearav
  • · Replies 5 ·
Replies
5

Conservation of linear momentum particle accelerator

  • MissEuropa
  • · Replies 1 ·
Replies
1

How Does Changing the Angle of a Third Polarizer Affect Light Intensity?

  • ObviousManiac
  • · Replies 1 ·
Replies
1

Solving for linear mass density of a string

  • AToMic93
  • · Replies 1 ·
Replies
1

Finding spring constants from an energy graph

  • sisi17
  • · Replies 1 ·
Replies
1

Magnetic Force on Various Sides of Spinning Loop?

  • longcatislong
  • · Replies 1 ·
Replies
1

Why can an object move at constant velocity if force equals kinetic friction?

  • supernova1203
  • · Replies 2 ·
Replies
2

What Causes the Colors in Soap Bubbles?

  • physgrl
  • · Replies 1 ·
Replies
1

Gun angle to hit a ship traveling in opposite direction

  • teddyayalew
  • · Replies 13 ·
Replies
13

How Much Longer Does It Take to Stop When Speeding in a School Zone?

  • TalibanNinja
  • · Replies 4 ·
Replies
4

Rearranging Equations to y= mx + b

  • Ranjan1995
  • · Replies 5 ·
Replies
5

What is the correct way to separate light into its component colors?

  • physgrl
  • · Replies 3 ·
Replies
3

Difficult Velocity/Travel/Wind problem

  • Aaron7
  • · Replies 2 ·
Replies
2

How to Find Acceleration with Given Time Over Two Equal Segments?

  • teddyayalew
  • · Replies 2 ·
Replies
2

Finding temperature increase from falling water energy loss

  • rose22
  • · Replies 3 ·
Replies
3

Magnetic Dipole Moment of an Electron

  • jm321710
  • · Replies 1 ·
Replies
1

Uniform Circular Motion Bicycle Tire

  • eagles12
  • · Replies 1 ·
Replies
1

Energy transfer from boiling water and refrigerator cooling

  • Conor11
  • · Replies 1 ·
Replies
1

Calculating Tension in a Horizontal Bar Connecting Two Halves of a Ladder

  • Fabio010
  • · Replies 7 ·
Replies
7

How Does the Biot-Savart Law Apply to a Right Angle Wire Configuration?

  • ParoXsitiC
  • · Replies 3 ·
Replies
3

Newton's Laws Finding Applied Force and other Forces

  • jackilynn
  • · Replies 1 ·
Replies
1

Finding Kinetic Coefficient of Friction

  • dzimme2
  • · Replies 8 ·
Replies
8

Finding unknown coin mass on a balanced ruler using torque

  • PeachBanana
  • · Replies 4 ·
Replies
4

Normal force and acceleration on a 1.0 kg water bottle lifted with 4.0 N

  • shubham1
  • · Replies 2 ·
Replies
2

How Fast Was the Car Going Before Skidding to a Stop?

  • shubham1
  • · Replies 10 ·
Replies
10

Why do thin films show rainbow colors instead of light and dark bands?

  • physgrl
  • · Replies 8 ·
Replies
8

Total Current in RLC Parallel Circuit

  • aurao2003
  • · Replies 7 ·
Replies
7

Finding the Maximum Current in an LC-only Circuit

  • Underhill
  • · Replies 13 ·
Replies
13

Magnitude and direction of the Electrostatic Force

  • wrenegade
  • · Replies 4 ·
Replies
4

Conceptual question regarding inductors and capacitors

  • NewtonianAlch
  • · Replies 9 ·
Replies
9

Calculate the 4th line of the Balmer Series

  • miniradman
  • · Replies 1 ·
Replies
1

How Do You Calculate the Index of Refraction in a Prism?

  • ObviousManiac
  • · Replies 4 ·
Replies
4

Understanding centripetal force and free body diagram

  • jsmith613
  • · Replies 88 ·
3
Replies
88

Physics/Fluid Mechanics Problem - badly

  • Kalookakoo
  • · Replies 13 ·
Replies
13
Replies
1

Waves and Superposition problem

  • majormaaz
  • · Replies 2 ·
Replies
2

Understanding Scalar and Vector in 2-D Uniform Motion Problem

  • NeedHwkHelp
  • · Replies 2 ·
Replies
2

How Is the Weight of a Bird Calculated When It Sits on a Kite?

  • justinh8
  • · Replies 31 ·
2
Replies
31

Calculating Mass Moment of Inertia for a Roller Door

  • exidez
  • · Replies 1 ·
Replies
1

Finding permability of free space from Magnetic Field vs. Current graph

  • BrownPrincezz
  • · Replies 3 ·
Replies
3

Thermodynamics singlestep - multistep gas compression

  • the-ever-kid
  • · Replies 1 ·
Replies
1

I figuring out the kg of ice can you melt

  • cwalker8184
  • · Replies 3 ·
Replies
3

Dynamics problems(force and friction and such)

  • thelegend123
  • · Replies 7 ·
Replies
7
Replies
1

Calculating Speed Along Sides of Right Angle at Intersection with Ruler

  • teddyayalew
  • · Replies 1 ·
Replies
1

Uniform Circular Motion in a Watch

  • eagles12
  • · Replies 2 ·
Replies
2

Diffraction grating spacing with 500 nm wavelength

  • physgrl
  • · Replies 2 ·
Replies
2

Volume of water a ship must displace to float

  • chaotiiic
  • · Replies 4 ·
Replies
4

Fisherman saling up stream and drops cork travels back .

  • teddyayalew
  • · Replies 2 ·
Replies
2

What Is the Magnetic Flux through a Loop in a Solenoid?

  • tnbstudent
  • · Replies 2 ·
Replies
2

Does Electromotive Force Have a Direction?

  • shalikadm
  • · Replies 1 ·
Replies
1

How Much Does a Spring Compress Under a 10-N Force?

  • kallied
  • · Replies 4 ·
Replies
4

Change of momentum of a crate within a system

  • junkie_ball
  • · Replies 4 ·
Replies
4

Mechanics problems involving velocity,acceleration and gravity

  • Conor11
  • · Replies 12 ·
Replies
12

Finding Force of Friction - Tug of War Problem

  • rocapp
  • · Replies 1 ·
Replies
1

Finding kinetic energy and velocity of an orbiting satellite

  • Gardamun
  • · Replies 8 ·
Replies
8

Current in circuit with resistor and two batteries

  • slain4ever
  • · Replies 19 ·
Replies
19
Replies
16

What Fraction Of Her True Weight Was Indicated?

  • Stanc
  • · Replies 24 ·
Replies
24

Planck length - what is it really?

  • Dialga
  • · Replies 1 ·
Replies
1

Calculating Potential Difference in a Capacitor with Resistors Circuit

  • NWNINA
  • · Replies 6 ·
Replies
6