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.
How Long Until a Heated Iron Handle Becomes Too Hot to Touch?
  • MisterX
  • · Replies 3 ·
Replies
3
Block on a rough plane Coefficient of Kinetic Friction
  • boognish
  • · Replies 2 ·
Replies
2
Series and parallel circuits help
  • nothingsus
  • · Replies 1 ·
Replies
1
Force, tension and blocks plx help
  • physicsuck
  • · Replies 3 ·
Replies
3
Spring constant for a block sliding PE and KE
  • Zsmitty3
  • · Replies 24 ·
Replies
24
Balloon Physics: Impact of Punctured Balloon on Horizontal Balance
  • kevinnn
  • · Replies 4 ·
Replies
4
What is the next step after finding the k-value in half-life calculations?
  • mateomy
  • · Replies 4 ·
Replies
4
Electric Field due to an Infinite Line
  • SalsaOnMyTaco
  • · Replies 1 ·
Replies
1
Solving Tension on Slope w/ 2 Packages
  • cjavier
  • · Replies 3 ·
Replies
3
How Do You Solve a Combination Lens Problem in Optics?
  • Darth Frodo
  • · Replies 3 ·
Replies
3
Frictionless puck goes up hill then falls. What's V0?
  • Zsmitty3
  • · Replies 10 ·
Replies
10
Breaking static friction w/ a circle
  • CollegeStudent
  • · Replies 14 ·
Replies
14
How Does Tension in a Frictionless Pulley System Behave with Balanced Forces?
  • boognish
  • · Replies 3 ·
Replies
3
Geometric Optics: Solving for Position & Nature of Image
  • Darth Frodo
  • · Replies 3 ·
Replies
3
A Force and Potential-Energy Problem
  • student34
  • · Replies 1 ·
Replies
1
Can You Engineer an Egg Drop Device to Survive a 14m Fall?
  • Jbreezy
  • · Replies 8 ·
Replies
8
What Forces Act on a Car Negotiating a Bend at Constant Speed?
  • timarli
  • · Replies 7 ·
Replies
7
How Does Elastic Collision Affect Thomas the Tank Engine and Diesel?
  • Inferior Mind
  • · Replies 18 ·
Replies
18
Pulley Problem With Tension Direction
  • cjavier
  • · Replies 4 ·
Replies
4
Calculating lost mechanical energy
  • bona0002
  • · Replies 5 ·
Replies
5
Torque Switching and Directional Tension in Pulleys
  • cjavier
  • · Replies 2 ·
Replies
2
How Does a Seat Belt Protect You in a Crash?
  • dio11
  • · Replies 1 ·
Replies
1
Straight line motion MCQ (Multiple choices)
  • gaudsmack
  • · Replies 3 ·
Replies
3
Time taken for an object to slide down a plane given μ, s and θ
  • PhysicsThrow
  • · Replies 3 ·
Replies
3
Two infinite lines of current in the same direction
  • datran
  • · Replies 1 ·
Replies
1
What is the Ratio of Internal to External Diameter for Equal Strength in Shafts?
  • MMCS
  • · Replies 7 ·
Replies
7
Series Circuit with two batteries
  • Ryoblck
  • · Replies 16 ·
Replies
16
Calculating Kinetic Energy of an Exploding Baseball
  • Robertoalva
  • · Replies 29 ·
Replies
29
Is My Calculation for Standard Error of a Stress Calculation Correct?
  • charlesltl
  • · Replies 5 ·
Replies
5
Need Help with Newton's equation and circular motion
  • JPTM
  • · Replies 2 ·
Replies
2
P-N Junction Diode - Charge question
  • bsr25
  • · Replies 9 ·
Replies
9
Why Doesn't an Object Submerged in Water Always Sink?
  • Bengo
  • · Replies 8 ·
Replies
8
What Is the Minimum Speed for a Steel Ball to Complete a Vertical Circle?
  • CollegeStudent
  • · Replies 15 ·
Replies
15
What is the shortest path a fly can take in a room with given dimensions?
  • EngnrMatt
  • · Replies 4 ·
Replies
4
V=wr. Is v tangential or center of mass?
  • cjavier
  • · Replies 1 ·
Replies
1
Find the resolving power of a microscope in terms of its diameter
  • mew1033
  • · Replies 5 ·
Replies
5
Will Reflected Light Produce a Bright Spot with Thin Film Interference?
  • NATURE.M
  • · Replies 3 ·
Replies
3
Solve Sin^2 Tetherball: 3.8 m Rope & 5.6 m/s Velocity
  • tony873004
  • · Replies 2 ·
Replies
2
Lorentz transformation question,
  • Sixty3
  • · Replies 1 ·
Replies
1
Current Density of water through a pipe
  • Colts
  • · Replies 10 ·
Replies
10
A friction problem containing a frictionless pulley
  • Amurri9030
  • · Replies 1 ·
Replies
1
This magnet question confounds me
  • lodovico
  • · Replies 1 ·
Replies
1
One dimensional Schroedinger equation solution
  • alewisGB
  • · Replies 1 ·
Replies
1
What is the Volume of Water Leaving a Tank Through a Rectangular Opening?
  • juanitotruan77
  • · Replies 11 ·
Replies
11
Centripetal force. Radius is not given. Find tension in each support
  • osman ibn ali
  • · Replies 4 ·
Replies
4
Calculating electric field strength, potential difference, and force.
  • CraigH
  • · Replies 8 ·
Replies
8
What Was the Force of Impact on My Mom During a Biking Accident?
  • DynamicMenace
  • · Replies 1 ·
Replies
1
Conceptual question on the eddington limit
  • channel1
  • · Replies 1 ·
Replies
1
What are the steps to solving a projectile motion problem?
  • CollegeStudent
  • · Replies 1 ·
Replies
1
Specific Heat Capacity, Heat Energy, Thermodynamics Physics
  • RCF
  • · Replies 3 ·
Replies
3
What Does the Scale Read When the Elevator Moves Downward?
  • Nirupt
  • · Replies 1 ·
Replies
1
Voltage drop across capacitor in RC circuit
  • Avalanche
  • · Replies 9 ·
Replies
9
Are My Free Body Diagrams Correct?
  • jonjacson
  • · Replies 6 ·
Replies
6
Question on Elliptic Orbits. Difficult.
  • Wesc
  • · Replies 3 ·
Replies
3
Two Pendulums connected by a spring
  • CAF123
  • · Replies 34 ·
2
Replies
34
Wire loop placed in B field which is decreasing uniformly
  • jj364
  • · Replies 4 ·
Replies
4
How Does Gauss' Law Apply to Electric Flux Through a Cube's Surface?
  • Go Boom Now
  • · Replies 4 ·
Replies
4
Calculate the inductance of a coil of wire
  • monnapomona
  • · Replies 3 ·
Replies
3
Centripetal force, enough information?
  • Gauss M.D.
  • · Replies 16 ·
Replies
16
Calculating Speed of a Block Pushed Across a Horizontal Surface
  • crimpedupcan
  • · Replies 4 ·
Replies
4
Total current through two wires
  • tenshi01
  • · Replies 12 ·
Replies
12
Problem with solving equation of motion
  • dosvarog
  • · Replies 9 ·
Replies
9
Modeling a tossed turkey leg (angular momentum)
  • besjbo
  • · Replies 18 ·
Replies
18
Tension and acceleration problem
  • freshcoast
  • · Replies 4 ·
Replies
4
Struggling with Questions 5, 7, & 8? Let me help!
  • StevenA
  • · Replies 3 ·
Replies
3
Error propagation in an average of two values
  • beth92
  • · Replies 3 ·
Replies
3
Angular frequency of orbiting charge in electric and magnetic fields
  • JamesOza
  • · Replies 4 ·
Replies
4
Proving the half-life of Potassium-40
  • GandhiReborn
  • · Replies 2 ·
Replies
2
How Do You Calculate Qh for a Non-Carnot Heat Engine?
  • physics.stu
  • · Replies 4 ·
Replies
4
Solving Ray Optics Problem: Understanding Refraction and Deviation
  • thunderhadron
  • · Replies 9 ·
Replies
9
How Do You Calculate Force Components on a Diagonal Path?
  • emutudeng
  • · Replies 3 ·
Replies
3
Mutual Inductance of Two RC Circuits?
  • Joyeuse
  • · Replies 4 ·
Replies
4
Identify process in a heat engine
  • physics.stu
  • · Replies 5 ·
Replies
5
How Do You Derive the Resultant Wave Using Superposition?
  • heycoa
  • · Replies 3 ·
Replies
3
Electric field between two spheres
  • DrummingAtom
  • · Replies 4 ·
Replies
4
In which direction ball will move?
  • ash64449
  • · Replies 3 ·
Replies
3
Solving Magnetic Flux Through a Sphere in a Homogeneous Field
  • faen
  • · Replies 17 ·
Replies
17
Particle Motion on Rotating Rod: Derivation and Special Cases
  • cacofolius
  • · Replies 3 ·
Replies
3
Upthrust: Weight of Object or Fluid?
  • coconut62
  • · Replies 2 ·
Replies
2
Continuity Equation - For a vertical pipe
  • hermish
  • · Replies 2 ·
Replies
2
Pressure at Height: Calculate Pressure Change
  • Saitama
  • · Replies 8 ·
Replies
8
Can Mass Spectrometry be a difficult technique?
  • maceng7
  • · Replies 1 ·
Replies
1
Pipe Flow Q: Frictional Head Loss in Tank?
  • theBEAST
  • · Replies 2 ·
Replies
2
Find the Initial Speed given Distance Traveled and Time Taken
  • Shauta
  • · Replies 3 ·
Replies
3
What was the average force exerted by the wall on the ball during the collision?
  • Nirupt
  • · Replies 9 ·
Replies
9
The Gravitational Force on a Particle inside a Concentric Sphere and Shell
  • h4d
  • · Replies 1 ·
Replies
1
Youngs Modulus and Standing Waves combined question
  • phoebz
  • · Replies 1 ·
Replies
1
Need help with gauss law and charged ring AP Physics FRQ
  • lodovico
  • · Replies 1 ·
Replies
1
Electric field in parallel plate capacitor
  • faen
  • · Replies 1 ·
Replies
1
Calculating the direction of Earth's magnetic field
  • SnapDragon
  • · Replies 10 ·
Replies
10
Ball Down a Ramp Help appreciated
  • Nfinley1
  • · Replies 8 ·
Replies
8
Expression for pressure in a brake system - is this correct?
  • dreamliner
  • · Replies 7 ·
Replies
7
How can I properly use significant figures in scientific experiments?
  • physicsbanana
  • · Replies 3 ·
Replies
3
Solving simultaneous equations F = ma
  • Jbreezy
  • · Replies 8 ·
Replies
8
How do you use vector scale diagrams to find total displacement?
  • kencamarador
  • · Replies 1 ·
Replies
1
Rocket Science - need confirmation
  • Element1674
  • · Replies 5 ·
Replies
5
Projectile motion off a raised surface
  • KarlBu
  • · Replies 3 ·
Replies
3
Conceptual questions about magnetism
  • channel1
  • · Replies 1 ·
Replies
1
Momentum and Energy problem, conservation.?
  • student1234
  • · Replies 1 ·
Replies
1
Magnetism and Magnetic Fields- Determining mass of ion
  • alyssadlt85
  • · Replies 1 ·
Replies
1