Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Popeye pulling himself up using a pulley
  • totallyclone
  • · Replies 14 ·
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14
How Does Mass Affect the Time It Takes Objects to Slide Down an Inclined Plane?
  • x86
  • · Replies 3 ·
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3
Mastering Physics: Rotational Motion Around Two Cylinders
  • lila.haj
  • · Replies 8 ·
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8
What are the initial velocities of two vehicles after a glancing collision?
  • njuice8
  • · Replies 1 ·
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1
Magnetic Field of a bent infinite wire
  • evanclear
  • · Replies 5 ·
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5
Collision and Kinetic Energy Problem
  • njuice8
  • · Replies 1 ·
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1
Photon emitted when proton changes state
  • wahaj
  • · Replies 2 ·
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2
Calculating Torque for Parliament Clock Tower Hands at 3:01
  • AeroVector
  • · Replies 13 ·
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13
What are the cord tension and force on the hinge for this angled beam?
  • hangingwire
  • · Replies 4 ·
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4
Energy of relativistic particle in LHC
  • Saitama
  • · Replies 3 ·
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3
Energy stored by a point charge
  • kayethetutor
  • · Replies 2 ·
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2
Does a Roller Coaster Conserve Mechanical Energy?
  • Jabababa
  • · Replies 5 ·
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5
Calculating Electric Charge: Find the Current in a Wire
  • Colts
  • · Replies 2 ·
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2
Two Infinitely Long Perpendicular Wires
  • trevor51590
  • · Replies 10 ·
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10
How big is the friction force on the truck?
  • chicagobears34
  • · Replies 9 ·
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9
Finding the distance of a space shuttle using radio wave transmissions
  • OnceKnown
  • · Replies 3 ·
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3
Potential Difference ( Battery + Motor )
  • Siune
  • · Replies 8 ·
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8
Frictionless pully acceleration
  • CollegeStudent
  • · Replies 5 ·
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5
What is the Tension in Each Cable Supporting the Lamp?
  • CollegeStudent
  • · Replies 6 ·
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6
Conservation of momentum problem regarding a missing mass of a ship
  • MichaelDunlevy
  • · Replies 3 ·
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3
Photons fired from the back of a moving spacecraft
  • Morgan8i6
  • · Replies 2 ·
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2
Gr12 charge attraction repulation question
  • oneshot
  • · Replies 2 ·
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2
Rotational dynamics - direction of friction
  • jaumzaum
  • · Replies 3 ·
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3
Heat Transfer Through a Styrofoam Container
  • Erubus
  • · Replies 1 ·
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1
Finding The Dielectric Constant
  • Bashyboy
  • · Replies 3 ·
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3
Solving the Mystery of Wrench Work Ratios
  • Saitama
  • · Replies 6 ·
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6
Question about freely falling objects
  • RuthlessTB
  • · Replies 3 ·
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3
Conceptual Question: Stars in intergalactic space with speed
  • idllotsaroms
  • · Replies 7 ·
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7
Thermodynamics - Saturated Vapor Quality Question
  • MechE2015
  • · Replies 3 ·
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3
Power Factor Proof: Avoid Poor PF < 0.8
  • physics97
  • · Replies 8 ·
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8
Help understanding E fields for line of charge and ring.
  • johnnyboy53
  • · Replies 4 ·
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4
Circuit with two batteries and three resistors - Find current
  • jperentosh
  • · Replies 2 ·
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2
What happens to the resonant frequency of a wine glass as you fill it
  • 06mangro
  • · Replies 1 ·
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1
Understanding Car-Wall Collisions: Net Force and Assumptions
  • Jabababa
  • · Replies 4 ·
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4
Size of pipe needed to transport helium problem
  • AlaskanPow
  • · Replies 1 ·
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1
How Do You Calculate the Initial Velocity of Water from a Drinking Fountain?
  • hn13
  • · Replies 1 ·
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1
Using Advanced Dynamics to find the Force Applied of a Truck
  • QuickSkope
  • · Replies 17 ·
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17
Why Do Sound Waves Travel Faster in Steel Than in Air?
  • CanMousePlate
  • · Replies 2 ·
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2
Curling simulation position functions
  • Delphi51
  • · Replies 2 ·
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2
Mastering Physics: Rolling Motion, Pebble stuck in a Tire by Static Fr
  • lila.haj
  • · Replies 1 ·
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1
Minimum force to overcome static friction
  • idllotsaroms
  • · Replies 2 ·
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2
Do we need any assumption when using Newton ring's formula ?
  • Outrageous
  • · Replies 1 ·
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1
Finding the Distance between fringes given different wavelengths
  • rocapp
  • · Replies 11 ·
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11
Musical frequencies, harmonic or nonharmonic?
  • Inquiring_Mind
  • · Replies 1 ·
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1
Static Equillibrium. [T=0, [F=0? Problem finding force using component
  • hangingwire
  • · Replies 4 ·
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4
Moment and tension problem maybe
  • suchal
  • · Replies 6 ·
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6
Simple displacement and acceleration question
  • jaydnul
  • · Replies 3 ·
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3
How does the earth exert gravitational pull on the sun
  • ASidd
  • · Replies 6 ·
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6
Tension in string - hanging block
  • tony873004
  • · Replies 3 ·
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3
Question related to heat and thermal energy
  • oldezwe
  • · Replies 1 ·
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1
Force exerted by a current carrying wire
  • Roodles01
  • · Replies 4 ·
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4
Calculating Building Height: Quick Kinematics Question
  • Cookies?
  • · Replies 3 ·
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3
Finding the Angle Between Two Forces
  • Astrum
  • · Replies 6 ·
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6
If the mass of the moon were tripled and it was moved to half as far f
  • oneshot
  • · Replies 3 ·
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3
Work/Kinetic energy, running a race with mass and speed
  • Willy_Kingston
  • · Replies 2 ·
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2
Momentum Planetary Motion Problem
  • Plutonium88
  • · Replies 4 ·
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4
Power dissipation in a circuit (Kirchoff's Laws)
  • Renaldo
  • · Replies 13 ·
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13
Linear Motion: 0.525kg Ball Travels 200m in 10s
  • revults
  • · Replies 4 ·
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4
Current in wire in Magnetic field[Easy QUICK question]
  • orangefruit
  • · Replies 3 ·
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3
A uniform spring whose unstretched length .
  • Estrex
  • · Replies 4 ·
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4
Potential difference in a uniform electric field
  • member 392791
  • · Replies 1 ·
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1
2 dimensional projectile motion with rifle and bullet
  • Painguy
  • · Replies 1 ·
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1
Fluid mechanics - Water flowing through a pipe
  • theBEAST
  • · Replies 3 ·
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3
Do noise-cancelling headphones use spatial or temporal interference?
  • InvalidID
  • · Replies 1 ·
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1
Finding terminal voltage given two batteries
  • taylorivy
  • · Replies 2 ·
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2
Final image distance using lenses
  • kiwi101
  • · Replies 1 ·
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1
Simple gravitational force problem (Gregory Classical Mechanics)
  • mathmonkey
  • · Replies 5 ·
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5
Parallel boat to dock jump. Sense of Humor required
  • burton95
  • · Replies 4 ·
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4
Maximum angular velocity and free body diagram
  • fredrogers3
  • · Replies 7 ·
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7
Force and potential energy function
  • bdh2991
  • · Replies 2 ·
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2
What is the tension in a system of 2 pulleys when acceleration is 0?
  • Member69383
  • · Replies 2 ·
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2
Vectors in Volleyball (finding distance ball will go)
  • cd79443
  • · Replies 2 ·
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2
Moving a point charge out of a cavity in a conductor
  • Momentous
  • · Replies 2 ·
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2
What is the Length of an Aluminum Rod Creating a Standing Wave at 6180 Hz?
  • SpringWater
  • · Replies 6 ·
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6
Relative Velocity of Bolt in Elevator
  • Toranc3
  • · Replies 5 ·
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5
How Far Does Superwoman Travel in the First 8 Seconds?
  • kencamarador
  • · Replies 1 ·
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1
Tension of the rope with 2 objects
  • cmkc109
  • · Replies 8 ·
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8
Static equilibrium against a wall
  • robertmatthew
  • · Replies 20 ·
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20
Electric Field Direction at 14.1 cm from a Charged Cylinder and Conducting Shell
  • SpringWater
  • · Replies 4 ·
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4
Acceleration and velocity problem.
  • kencamarador
  • · Replies 1 ·
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1
Question on the nature of induction
  • hamhamt
  • · Replies 3 ·
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3
Finding the Center of Percussion
  • bd2015
  • · Replies 3 ·
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3
What is the instantaneous speed at t=30 minutes on the given graph?
  • Zashmar
  • · Replies 9 ·
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9
Heat engine: moles/temp unknown
  • joe_cool2
  • · Replies 2 ·
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2
How to find wavelength with only distance
  • PhizKid
  • · Replies 4 ·
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4
Two balls are thrown vertically upward, one with an initial speed twic
  • cmkc109
  • · Replies 12 ·
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12
Center of Mass and Linear Momentum
  • iAmKhanz
  • · Replies 4 ·
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4
Determine current using Kirchoff's Junction/Loop Rule
  • Renaldo
  • · Replies 2 ·
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2
Solving for T in an acceleration equation
  • kencamarador
  • · Replies 5 ·
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5
Speed of Block after Newton's Second Law
  • idllotsaroms
  • · Replies 1 ·
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1
A lot of considerations about the Bohr's Hydrogen Atom
  • jaumzaum
  • · Replies 3 ·
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3
What Causes Energy Loss in Cables?
  • salihdemir
  • · Replies 3 ·
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3
Earth orbiting around sun - finding speed with known mass and radius
  • EvaSindelarova
  • · Replies 4 ·
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4
Circular Motion and Static Friction Problem The Wall of Death ride
  • jklops686
  • · Replies 4 ·
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4
Banking curve problem (find maximum speed)
  • 5ymmetrica1
  • · Replies 4 ·
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4
A mass of 30kg on a smooth horizontal table is tied to a cord running
  • cmkc109
  • · Replies 8 ·
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8
Displacement Calculations for Canadian and Norwegian Skiers
  • tarun766
  • · Replies 6 ·
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6
What forces act on the suspended mass and is it in motion?
  • AeroVector
  • · Replies 1 ·
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1
How Do You Isolate Δt in the Kinematic Equation?
  • kencamarador
  • · Replies 3 ·
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3
When to use centripetal vs. radial acceleration
  • fredrogers3
  • · Replies 10 ·
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10