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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How to Calculate ω in a Mechanical System
- lussi
- · Replies 12 ·
Angular Momentum and Kepler's Second Law
- Bashyboy
- · Replies 6 ·
Capacitor in Series and Parallel combination
- carnot cycle
- · Replies 10 ·
High Frequency Versus Low Frequency
- GGalaxy
- · Replies 6 ·
Bullet Range Neglecting Air Drag
- nikefan5555
- · Replies 8 ·
Three masses connected by string and pulley with friction
- jeff.reinecke
- · Replies 7 ·
Why do people say that the person would be weightless?
- rakeru
- · Replies 13 ·
How do you identify the axis of rotation for a rigid body?
- andyrk
- · Replies 9 ·
Massless and Frictionless Pulley
- andyrk
- · Replies 13 ·
Force on a two block and a spring system
- Saitama
- · Replies 58 ·
How does the index of a medium affect the focal length of a lens?
- physicsphreak2
- · Replies 2 ·
Question: Calculate Wavelength from Intensity
- Hiyun
- · Replies 3 ·
Calculating change in energy of a particle
- x86
- · Replies 3 ·
Min weight of elevator accelerating, constant velocity, decelerating
- judas_priest
- · Replies 1 ·
Speed-time graph What is the highest speed?
- alingy1
- · Replies 10 ·
Pilots, diving and apparent weight
- NA19
- · Replies 10 ·
Momentum Question Involving Elastic Collision
- GarrettB
- · Replies 11 ·
Constant velocity and net force
- komender
- · Replies 6 ·
What are the correct units for strain?
- Baumer8993
- · Replies 4 ·
What is the tension in the cable and the reaction at D?
- yaro99
- · Replies 8 ·
What is the relationship between tornadoes and dew point?
- vmedica
- · Replies 4 ·
Molar heat capacity for ideal gas in process T = T₀e^(αV)
- Saitama
- · Replies 16 ·
The highest possible potential in a van de Graaf generator
- Order
- · Replies 22 ·
Is Friction Necessary for Rolling Without Slipping?
- andyrk
- · Replies 1 ·
Helicopter air projection velocity problem
- FBayer
- · Replies 8 ·
Calculating an expression for work in a magnetic field
- QuickSkope
- · Replies 6 ·
How High Can Pumped Water Reach in a Building Fire?
- monicaalves
- · Replies 3 ·
Hooke's law spring configurations
- judas_priest
- · Replies 14 ·
Why does a positive charge have higher potential than a negative charge?
- tsgkl
- · Replies 7 ·
How is tension calculated when a rope changes direction?
- BadSkittles
- · Replies 17 ·
Why is (Kinetic friction)= fk≤fs (Static friction) ?
- andyrk
- · Replies 5 ·
I really with these questions
- Aditi1705
- · Replies 1 ·
Does moving an object back to its starting position count as zero net work?
- BadSkittles
- · Replies 6 ·
Why does a hammer with 100x mass fall at the same rate as a feather?
- BadSkittles
- · Replies 16 ·
Mechanics Of Materials Stress Problem
- Baumer8993
- · Replies 3 ·
Change in velocity from east to northeast
- Jimbo57
- · Replies 8 ·
Physics coefficient of friction question
- Jasmin99
- · Replies 8 ·
What Is the Normal Stress in a Prismatic Bar Under Tension?
- Baumer8993
- · Replies 3 ·
Why we write W/L = 50/0.5 not W/L = 100?
- anhnha
- · Replies 3 ·
Solving Impedance Diagrams: Finding i(t) with XL = ωL
- k31453
- · Replies 3 ·
How can power be the same on two inclined planes with different angles?
- alingy1
- · Replies 9 ·
How is the tension of a rope calculated in a climber's FBD?
- BadSkittles
- · Replies 12 ·
Help Solving Dynamics Problem: Skier Coasting Down Hill
- lussi
- · Replies 4 ·
How can a sphere roll and slip at the same time?
- andyrk
- · Replies 13 ·
Why Is Tension Zero at the Free End of a Rotating Rope?
- andyrk
- · Replies 2 ·
Magnetic Flux of a Wire Sliding on L-Shaped Rail
- assaftolko
- · Replies 6 ·
Thermodynamics: First law and work definition
- FFRamirez
- · Replies 1 ·
Kinetic energy of two different masses (ratio)
- alingy1
- · Replies 2 ·
Calculate the net force on square loop (Magnetism)
- theunbeatable
- · Replies 5 ·
Horizontal force on a post in a Hammock
- sun.there
- · Replies 1 ·
Uniform Circular Motion extended response
- NickSpain96
- · Replies 2 ·
Fnet = ma Ff = -0.3375/0.08 = -4.219N
- CollegeJunior
- · Replies 5 ·
Particle with horizontal velocity and vertical acceleration
- Robertoalva
- · Replies 7 ·
Ball rolling off 32° incline 9.0m high, finding horizontal distance
- Geminiphysics
- · Replies 14 ·
Thermocouples: Advantages and Disadvantages
- Knightycloud
- · Replies 2 ·
Vertical acceleration and horizontal velocity
- Robertoalva
- · Replies 24 ·
Why do two blocks of different mass travel the same distance with friction?
- BadSkittles
- · Replies 1 ·
Net force on a charge - Coulomb's law
- rms5643
- · Replies 1 ·
Block attached to spring - calculate how far it will move
- jcjc16
- · Replies 5 ·
Simple DC motors Current, Torque, EMF and Faraday's Law
- sleeppotato
- · Replies 14 ·
Energy required to heat up a 4000 cm^3 of air to 1500 Celsius
- Panthera Leo
- · Replies 7 ·
Calculating the net force acting on a object from diagrams
- hg10tr
- · Replies 5 ·
Acceleration due to Gravity on Mars
- mlee16
- · Replies 3 ·
What is the tension in a pulley system with multiple weights?
- JeyGamer
- · Replies 4 ·
Work done raising a piston against atmospheric pressure isothermally
- Saitama
- · Replies 6 ·
Understanding the Motion of Electrons in a Magnetic Field
- Saitama
- · Replies 27 ·
Calculating Heat Required to Warm Earth's Oceans by 1.0 °C
- jwainwright09
- · Replies 15 ·
What is the velocity of the center of inertia after bar 1 breaks off the wall?
- Saitama
- · Replies 9 ·
Understanding Electricity and Circuits
- anhnha
- · Replies 5 ·
How do curve speed and incline angle affect the downward force on a car?
- NA19
- · Replies 3 ·
How do lever arms affect the velocity of objects?
- NA19
- · Replies 10 ·
Acceleration of wedges and particles
- Woolyabyss
- · Replies 9 ·
Invisible Charge: Solving for Equal Distance in Coulomb's Law
- somasimple
- · Replies 3 ·
Why the light increases when Prof. Lewin touch the end of the tube?
- anhnha
- · Replies 5 ·
How many ways to sum vectors in a plane to zero
- bkraabel
- · Replies 13 ·
Why Plot T² Against 1/K for a Straight Line Graph in Oscillation Studies?
- Peter G.
- · Replies 2 ·
Magnitude of force to keep stick in equilibrium.
- zeralda21
- · Replies 5 ·
Terminal Velocity Given Acceleration at Instantaneous Velocity
- Greatness
- · Replies 4 ·
Why voltage in a short circuit is 0?
- alexmath
- · Replies 3 ·
Zero Group Velocity: What Does it Mean?
- Zarquon
- · Replies 1 ·
How? Which Trig Identityis that?
- k31453
- · Replies 5 ·
Hookes law: Calculate the work done by compressing a spring
- x86
- · Replies 1 ·
Momentum Conservation and Rebound Velocity Comparison
- Fresko
- · Replies 8 ·
What is the tension just before and just after touching the nail?
- andyrk
- · Replies 14 ·
How Do I Solve These Equilibrium Equations with T₂ and T₃?
- Suarden
- · Replies 20 ·
Calculating Carbon-14 Activity for Archaeological Samples
- tg22542
- · Replies 2 ·
Calculating Heat Energy Changes in a Water and Ice System
- Ravi Ramdoolar
- · Replies 6 ·
Why is the Integral of Force Over dx Equal to Kinetic Energy?
- BadSkittles
- · Replies 1 ·
Solving Momentum Questions: Find Speed of Toy Car After Pellet Impact
- Fresko
- · Replies 4 ·
Drift current Is of PN junction under open-circuit conditions
- anhnha
- · Replies 1 ·
How Do Two Masses and a Spring Behave on a Frictionless Surface?
- SqueeSpleen
- · Replies 11 ·
What does maximum mean in this physics problem?
- Fresko
- · Replies 2 ·
Trooper catching speeder starting 4 seconds behind
- Nirupt
- · Replies 17 ·
Conditions for pulleys and strings
- andyrk
- · Replies 37 ·
Calculating Time Difference in Pursuit Situations
- Saitama
- · Replies 34 ·
Kinetic energy and momentum in an inelastic collision
- Fresko
- · Replies 9 ·
Angle when a projectile is launched at a height from the ground
- cookiecrumbzz
- · Replies 4 ·
Looking for an algebraic definition of work.
- Diax
- · Replies 4 ·
Penetrating power of radiation questions
- tg22542
- · Replies 7 ·
Minimal angular velocity of a swinging homogenous stick ?
- CandiedPaper
- · Replies 2 ·