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

Where Will the Final Image Be Located in a Two-Lens System?

  • withthemotive
  • · Replies 1 ·
Replies
1

R1 350 Ohms: What Current Flows at 50V?

  • x^2
  • · Replies 3 ·
Replies
3

Force on 2 Masses Homework: FBD, N3, Acceleration & Force

  • loka
  • · Replies 1 ·
Replies
1

Roational Inertia of a triangle

  • joserse46
  • · Replies 4 ·
Replies
4

Solve EMF & Power for Current & Resistor Homework

  • swede5670
  • · Replies 10 ·
Replies
10

Finding the capcitance of this capacitator

  • Dell
  • · Replies 13 ·
Replies
13

Finding Period with Double Stars

  • rss14
  • · Replies 1 ·
Replies
1
Replies
1

What Frequencies Form Standing Waves in a Microwave Cavity?

  • holaholayo
  • · Replies 2 ·
Replies
2
Replies
3

How Do Kepler's Laws Explain Satellite Orbits in Simulated Experiments?

  • Miriverite
  • · Replies 1 ·
Replies
1
Replies
1

R Network- finding total resistance.

  • GDGirl
  • · Replies 2 ·
Replies
2

Fundamental Frequency of Open and Closed Tube

  • veronicak5678
  • · Replies 2 ·
Replies
2

Solve Torque Question: Will Free Point B Go Up?

  • toqp
  • · Replies 1 ·
Replies
1
Replies
1

Calculating Centrifugal Force of a Car on a Curved Road

  • Ry122
  • · Replies 5 ·
Replies
5

Thin film light interference question

  • ia22
  • · Replies 1 ·
Replies
1

What is the difference between an induced emf and a back emf?

  • jayjay112
  • · Replies 2 ·
Replies
2

Elastic Collision: 1kg Object, 0.7kg Object, 0.2s Interval

  • ironhawk316
  • · Replies 1 ·
Replies
1
Replies
13

Magnetic poles (A simple question but I dont know how to answer it?)

  • jayjay112
  • · Replies 1 ·
Replies
1

Which Hand Rule Determines Current Direction in Magnetic Fields?

  • jayjay112
  • · Replies 7 ·
Replies
7

Thevenin's equivalent circuit problem

  • backstance
  • · Replies 5 ·
Replies
5

Calculating Final Speed & Angle of a Rocket Motion

  • tamref
  • · Replies 4 ·
Replies
4

What Is the Final Velocity of a Mass Accelerated by a Force?

  • lisafeary
  • · Replies 2 ·
Replies
2

Galileo's Incline plane Help for SAC.

  • paul265
  • · Replies 5 ·
Replies
5

Seperation of the induced charge

  • 385sk117
  • · Replies 2 ·
Replies
2

Reverse Magnetism in Bar Magnet: Physics Theory Explained

  • WarFace
  • · Replies 1 ·
Replies
1
Replies
8

Pendulum speed with only height from equilibrium

  • Serpentia
  • · Replies 4 ·
Replies
4

Phase Behavior of RL Circuits: Explained

  • driedupfish
  • · Replies 1 ·
Replies
1

How Does Charging by Induction Work with a Positive Object?

  • jgens
  • · Replies 1 ·
Replies
1

Air Pressure and Net Force on a Door in a Tornado

  • NPM
  • · Replies 3 ·
Replies
3

Solving Refraction Problem: Aim Flashlight at What Angle?

  • roxxyroxx
  • · Replies 7 ·
Replies
7

What is the net torque on a wheel with given dimensions and direction?

  • aaronb
  • · Replies 4 ·
Replies
4

Circular Motion: Calc Centripetal Force on Amoeba

  • brentwoodbc
  • · Replies 6 ·
Replies
6

Determining Natural Length of a Spring

  • TG3
  • · Replies 2 ·
Replies
2

Calculating Average Intensity of a laser blackboard pointer

  • patelpalak
  • · Replies 5 ·
Replies
5

Work to Stretch Spring from 35cm to 40cm

  • TG3
  • · Replies 2 ·
Replies
2

Solve Circular Motion: Satellite Height, Speed, Location

  • T71979
  • · Replies 2 ·
Replies
2

Electric Circuit Homework: Parallel & Series Heating Power

  • Finland
  • · Replies 1 ·
Replies
1

What is a Suitable Projectile for a Small Trebuchet?

  • davie08
  • · Replies 1 ·
Replies
1

Friction: Body Movement on Slope

  • DIrtyPio
  • · Replies 12 ·
Replies
12

Solving for Unknown Frequency: Tuning Fork Beats

  • veronicak5678
  • · Replies 2 ·
Replies
2

Electric Field Equations: What Determines the Use of r vs. r^2?

  • Air
  • · Replies 13 ·
Replies
13

Where Can I Find Sinusoidal Problems for RC and RL Circuits?

  • m.farrukh
  • · Replies 2 ·
Replies
2

Special Relativity: Why is Length Contraction Inverse of Time Dilation?

  • flooflar
  • · Replies 2 ·
Replies
2

What Is the Distance Traveled by a Disc on a Block Before Coming to Rest?

  • chingcx
  • · Replies 1 ·
Replies
1

How much charge stored in capacitor ?

  • ixtra
  • · Replies 2 ·
Replies
2

Angular acceleration and angular velocity

  • heyrefusuck
  • · Replies 3 ·
Replies
3

Pulley and block system tension & acceleration

  • heyrefusuck
  • · Replies 1 ·
Replies
1
Replies
3

Parachutist problemNeed help where to begin

  • platonas1
  • · Replies 3 ·
Replies
3
Replies
7

Electromagnetism calculation help

  • cleggy
  • · Replies 1 ·
Replies
1

Finding the coefficient of kinetic friction using impulse/momentum

  • cjdavis7
  • · Replies 8 ·
Replies
8

What Is the Speed of the Second Puck After a Head-On Collision?

  • lilmissbossy
  • · Replies 5 ·
Replies
5

Thermal Expansion Ethanol Problem

  • Fizzicist
  • · Replies 5 ·
Replies
5

Rotational Mechanics(The concept of spinning)

  • FedEx
  • · Replies 6 ·
Replies
6

Potential difference in parallel - capacitors

  • StuckInPhysic
  • · Replies 6 ·
Replies
6

Impossible heisburg uncertainty question that makes no sense

  • footballfreak
  • · Replies 4 ·
Replies
4

Force exerted on inside of a box by a gas

  • aolson
  • · Replies 4 ·
Replies
4

Calculate Tension in String: m1=4.50 kg, m2=7.50 kg, a=1.4 m/s^2

  • itsmyflow
  • · Replies 2 ·
Replies
2

What is the Minimum Uncertainty in Block's Speed on a Frictionless Surface?

  • footballfreak
  • · Replies 4 ·
Replies
4

Estimate the density of the water

  • kritzy
  • · Replies 4 ·
Replies
4

Object Lifted By Cord (Stress/Tension Problem)

  • kritzy
  • · Replies 3 ·
Replies
3
  • Poll Poll

How to get the critically damped vibration equation

  • zina
  • · Replies 1 ·
Replies
1

Help with Spring Problem - Find a Function & Position at t=pi/12

  • infinityhaiti
  • · Replies 9 ·
Replies
9

Thermodynamic Work: Find w P, V, T Not Constants

  • thejinx0r
  • · Replies 1 ·
Replies
1

Angular position, speed, and acceleration

  • aaronb
  • · Replies 2 ·
Replies
2

Calculating Width of Single Slit Diffraction Pattern

  • phy112
  • · Replies 5 ·
Replies
5
Replies
29

I used to be good at phyics, but

  • aviodont
  • · Replies 31 ·
2
Replies
31

B-field Component of Electromagnetic Wave After Change in Time

  • x^2
  • · Replies 2 ·
Replies
2

What Is the Efficiency of a Monoatomic Ideal Gas Cycle?

  • diegzumillo
  • · Replies 10 ·
Replies
10

Resonance & Tubes: Frequency of Tuning Fork

  • m.l.
  • · Replies 1 ·
Replies
1

Energy Conservation: Determining Forces on Particles

  • cleggy
  • · Replies 8 ·
Replies
8
Replies
5

How Do You Calculate the Radius of a Copper Cable Using Ohm's Law?

  • Malaya
  • · Replies 1 ·
Replies
1

Focal length of her contact lenses

  • phy112
  • · Replies 2 ·
Replies
2

Mercedes-Benz on a hill (friction, normal force) Please help

  • BATBLady
  • · Replies 3 ·
Replies
3

Calculating Probability of Particle in a Box

  • Kruum
  • · Replies 4 ·
Replies
4

Voltage/current in circuit with two temperature sensors

  • Mårten
  • · Replies 15 ·
Replies
15

Calculating earth's speed using radius and speed of light, etc.

  • DDRchick
  • · Replies 8 ·
Replies
8

Point charges arranged as a trianngle

  • jenzao
  • · Replies 1 ·
Replies
1

Temperature and Kinetic Energy question

  • 9giddjl
  • · Replies 2 ·
Replies
2

Distance between lense and film to get a focused picture

  • phy112
  • · Replies 1 ·
Replies
1

Comparing power output of Solar Panels/cells

  • jonnyrocks
  • · Replies 3 ·
Replies
3

Question on heat transfer of a plane wall

  • sero2000
  • · Replies 1 ·
Replies
1

What Is the Pressure on an Object 10m Below Sea Level?

  • laura297
  • · Replies 2 ·
Replies
2

Easy Acceleration / Friction question

  • dglenn9000
  • · Replies 6 ·
Replies
6

How Do You Calculate Rotational Inertia for a Solid Block?

  • seraphimhouse
  • · Replies 1 ·
Replies
1

How to Calculate Initial Radioactive Activity for Patient Treatment?

  • soul5
  • · Replies 1 ·
Replies
1

Why Does the Tension in the Lower Rope Not Depend on Mass M1?

  • tizzful
  • · Replies 5 ·
Replies
5

Maximum Height Reached by Block on Spring

  • Ry122
  • · Replies 4 ·
Replies
4

Heat Pump Q: Cost of Winter Heat w/ 75% CoP

  • ewnair
  • · Replies 4 ·
Replies
4

Evaporation from a swimming pool

  • jabbie3
  • · Replies 1 ·
Replies
1

How far has the spring been compressed?

  • Ry122
  • · Replies 1 ·
Replies
1

Depth of lake (Pressure/fluids)

  • Elbobo
  • · Replies 2 ·
Replies
2