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.
Quantum mechanics and an LED lab help
  • venndicator
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How Much Force Did the Rocket Exert on the Sled?
  • freshcoast
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What Forces Act on a Box Moving Up a Frictional Ramp?
  • freshcoast
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Viscosity of a Fluid measured by a viscometer
  • DylanW
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Resistance in a combination circuit
  • wahaj
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7
Finding the Commutator of Two Operators
  • Denver Dang
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4
Gravitational potential energy of a sphere of non-uniform density
  • mell0r
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11
Finding the Range of a Bullet Fired from a Sliding Incline
  • Toranc3
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Horizontal component of force without angle given?
  • Hanyuu
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5
Pendulum motion and pythagorean theorem
  • sunnyday01
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4
WHY does curvature of a convex lens affect focal length?
  • Anf31ld
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1
What is the angle of the hill when the box slides with constant speed?
  • freshcoast
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3
Momentum, Impulse, and Collisions: Wooden Block Shot with a bullet
  • ahorowitz1
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Point Charge in an uncharged spherical conductor
  • SauerKrauter
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4
Need help finding potential energy formula
  • Sneakatone
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12
WHY does the sign for B1 and B2 keep CHANGING in this Bnet equation?
  • riseofphoenix
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Kinetic Energy and Work Homework Help
  • KTiaam
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3
Riding a Loop the Loop (velocity at the bottom of the loop)
  • clope023
  • · Replies 13 ·
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13
Frictional Force: Comparing Forces
  • krackers
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1
Understanding the Delayed Effects of the Russian Meteor Strike
  • Dewbo
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2
Finding velocity of car in Carnival ride
  • chicagobears34
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10
How can i get the velocity of waves ?
  • Mohamed9005
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1
Find Center of Mass of Hemisphere Homework
  • JJfortherear
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1
Conservation of Energy, pendulum problem
  • Litcyb
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5
How Can Fermat's Principle and Snell's Law Help You Find a Car Key in Water?
  • chrisakatibs
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How Does Water Leakage Affect the Frequency of a Vibrating Guitar String?
  • chrisakatibs
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How High Does a Golf Ball Go When Driven at 24.5 Degrees?
  • richardjoe05
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1
What Is the Linear Acceleration of the Hoop in a Pulley System?
  • cp255
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3
Velocity(t), of rod moving in B-field
  • serverxeon
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1
Resistance and How It Varies With Diameter
  • Bashyboy
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1
Right Hand Rule doesn't work for this problem?
  • riseofphoenix
  • · Replies 4 ·
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4
Electric field on each midpoint of square of side L
  • Dexter09
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38
Calculating Self Capacitance of an Isolated Sphere
  • Saitama
  • · Replies 35 ·
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35
Finding Minimum Friction for Static Wedge: A Free Body Analysis Approach
  • safat
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5
Maybe I posted in wrong forum: Fluid Mechanics help Chasing a deadlin
  • DylanW
  • · Replies 11 ·
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11
Understanding Potential Difference in Terms of Electric Field and Distance
  • Miike012
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How far away is she from the centre of the earth?
  • calidreaminn
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3
Why might the two methods of calculating net torque not agree?
  • Losttime
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Multiple dielectrics inserted in capacitor
  • member 392791
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What is the maximum energy an electron can have after scattering a 40keV photon?
  • bmb2009
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How fast will your twin crash into the overturned truck?
  • freshcoast
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4
Why Does a Toy Airplane on a String Tilt When It Flies in Circles?
  • kirafreedom
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Spring/block on horizontal plane SHM
  • physninj
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3
Calculating Wheel Forces on a Car's Center of Gravity
  • robertmatthew
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Initial speed with Angle and distance
  • Computerguy
  • · Replies 11 ·
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11
Discontinuity in electrical field.
  • peripatein
  • · Replies 14 ·
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14
Current and Voltage of Elements of a Circuit with a Solenoid.
  • Thadis
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4
Kinetic energy of electron & energy states
  • Kognito
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3
Direct-current circuit/Kirchhoff's law problem
  • Lolligirl
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Thermodynamic Efficiency and the maximum possible electric output
  • annie05
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Kinetic Energy in water and the rate carried across each square meter
  • annie05
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Graph Vout vs Vin of diode circuit
  • leroyjenkens
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Acceleration on a parabolic curve
  • issacnewton
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Statics, determine the force required to rotate a body
  • jonjacson
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Help Needed: Figuring Out How to Make a Linear Graph from Lab Data
  • minhdo
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Show that the wavefunction is normalized
  • Von Neumann
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Yet another numerical on friction
  • sankalpmittal
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Quick question about electric fields in capacitors.
  • Ishida52134
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Finding the Location of the 2nd Antinode in a Standing Wave at 4.10 Meters
  • jamcintyre1
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Finding the semi-major axis of a transfer orbit?
  • kasra12321
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Understanding Hyperbolic Functions
  • lch7
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Finding the Function of a Given Graph
  • lch7
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Calculating Angle and Height in Conservation of Energy Problem with Friction
  • TheMasterFool
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Magnitude of Potential Difference Between Two Points
  • anomalocaris
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Help with determining the direction of induced currents
  • riseofphoenix
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Kinetic and potential energies of a harmonic oscillator
  • Von Neumann
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Telling whether a wave function might have physical graph
  • Von Neumann
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Trouble with a basic one-dimensional motion problem
  • brizznook
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Finding Mechanical Energy without knowing Efficiency
  • jennyskywalker
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How Can a Simple Electric Motor Be Created Using a Coil in a Magnetic Field?
  • CAF123
  • · Replies 21 ·
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Which design is better for a popsicle stick bridge: left or right?
  • agm1984
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Conservation of Momentum/Collisions
  • happycreature
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5
How to Calculate Final Charge on Capacitors Connected in Series?
  • member 392791
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Understanding Charge: Types, Properties, and Mysteries Explained
  • davon806
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4
Question about waves (velocity, tension)
  • NicoleRosalyn
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Force pushing two gliders on an air track.
  • kevinius
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Using recoil of atom to find correct in wavelength of emitted photon
  • Fluxthroughme
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Ball rolling off ramp - what happens?
  • randomkent
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Solving for Magnetic Flux in a Rotating Wire Loop
  • lovelyrwwr
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Finding RMS Speed of Gas Atoms: Ideal Gas
  • AllenHe
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Number of collisions; elastic collisions
  • Gloyn
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5
What Causes Oscillatory Motion in a Particle with a Constant Force?
  • Rulonegger
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Kinematics : A Rock Being Dropped off a Cliff
  • miniradman
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Inelastic collision (finding e, don't understand concept)
  • coconut62
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How is the planet-star ratio determined using the transit method?
  • Tryingmybest
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Finding distance between two origin points; waves
  • Butterlegs
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Shuttle moving in a circular orbit
  • clownbaby
  • · Replies 4 ·
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Linear Algebra Applications in Astrophysics
  • Chelsea S
  • · Replies 4 ·
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Finding the Velocity of Light through an Unknown substance
  • OnceKnown
  • · Replies 2 ·
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Trying to find orbital velocity based off of height
  • kasra12321
  • · Replies 7 ·
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Two Dimensional Kinematics probelms
  • riken9
  • · Replies 3 ·
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Significant digits including only one zero
  • alingy1
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Statics: Find resultant force and couple moment
  • Chandasouk
  • · Replies 2 ·
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Calculating electron charge in lab
  • bfusco
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Horizontally missed target, By how much?
  • lisa1220
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Use the law of reflection and index of refraction to find apparent d
  • rocapp
  • · Replies 3 ·
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Find m1's coordinates using center of mass equation | Extended Object"
  • dgx
  • · Replies 3 ·
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Potential Energy in two springs system problem
  • Eohlas
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What Causes Tension in a Whirling Rope?
  • amiras
  • · Replies 1 ·
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Calculating the reflected power from solar radiation on the moon
  • mell0r
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2