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.
Simple harmonic motion on an incline
  • PhizKid
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What is the principle of moments?
  • JoHickie
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Horizontal spring with friction
  • Ali 2
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Wavelength Problem: Compute Frequency in 4m Room
  • cytochrome
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Potential of Infinite Sheets of Charge and Conducting Slab
  • Gee Wiz
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Calculate the flux through a cube of size 1.0 m
  • junglebobo
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Calculating Angular and Linear Speed and period of revolution
  • FaraDazed
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How Do You Calculate Projectile Velocity at Different Times?
  • mgerman63016
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Clay falling onto a pan attached to a vertical spring
  • ultimateman
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Calculating Charges of Identical Tiny Conducting Spheres
  • fresheze13
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Flux through far away disc and potential Q.
  • CAF123
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Zero Total Charge: How is this Possible?
  • fishingspree2
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Need a Double Check / Verification
  • Inferior Mind
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Struggling with finding the mass req'd when velocity is doubled
  • Harrison01
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8
Understanding Free Body Diagrams for Cantilevered Structures
  • pyroknife
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Find equivalent resistance in this circuit
  • Hyperfluxe
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4
Work, Net work, Work done by friction
  • dcasplen
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18
Physics Postlab Help - Get Answers to Questions
  • Habibrobert
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4
Infinite number of turns in finite time
  • paras02
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8
Solving Velocity Time Graph: Car 1 vs. Car 2
  • Nirupt
  • · Replies 17 ·
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17
Projectile Motion velocity homework
  • _physics_noob_
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7
Beta decay of deuterium and triterium
  • pbonnie
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4
Finding the angle between two magnitudes.
  • Daweih
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3
Electric Field Between Two Infinite Sheets of Charge
  • BRuss9807
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Another Double Check FBD String Tension
  • Inferior Mind
  • · Replies 3 ·
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3
The number of kg needed to pull apart Magdeburg Hemispheres
  • ShelbyMcD
  • · Replies 12 ·
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12
Find magnitude of acceleration on a Ca ion, given electric field.
  • monnapomona
  • · Replies 8 ·
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Finding the final velocity of a proton
  • becky_marie11
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Difficult optimal cable cost analysis
  • algar32
  • · Replies 69 ·
3
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69
KVL Node Voltage: Positive vs Negative Assumption in Homework Solution
  • cpatel23
  • · Replies 1 ·
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Chemical potential in Thermodynamics to find latent heat of vaporization
  • musicure
  • · Replies 7 ·
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7
Find how far the spring will be stretched
  • ShelbyMcD
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2
Centripetal acceleration of a vehicle on banked circular arc
  • Zatman
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2
Calculating Energy Needed for Change of Phase: Do I Need One More 'mCΔT'?
  • AbsoluteZer0
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2
Determing unknown weight of an hanging object in a systen
  • GoGoGadget
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3
Each Car has Speed Corresponding to Max Normal Acceleration. Find Time Elasped
  • Northbysouth
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Electric Field Problem-Balancing Forces
  • tyreal
  • · Replies 6 ·
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6
Thermodynamic Properties; Isentropic Expansion
  • FlyingSpartan
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2
Isothermal exapansion, work done
  • Saxby
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3
Calculating Capacitor Charge and Energy: A Quick Guide
  • CharlieBewn
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2
What Speed Does a Spacecraft Need to Escape the Solar System from Earth's Orbit?
  • Bashyboy
  • · Replies 30 ·
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What is the horizontal distance between a tilted conveyer belt and a pipe?
  • burton95
  • · Replies 7 ·
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Centripetal Acceleration and Force
  • FaraDazed
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3
Calculating Friction Force on a Rotating Disk
  • 5Mystery
  • · Replies 1 ·
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Equivalent Capacitance of Complex Circuit
  • megaspazz
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5
Designing an Effective Egg Catcher: Materials and Strategies
  • Zanmar
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Electric potential of tiny spheres question
  • lodovico
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Voltage output for ideal diode (solutions wrong?)
  • pyroknife
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Vertical hydrostatic force acting upwards on a curved surface?
  • theBEAST
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Finding Velocity and Acceleration for a Moving Particle
  • tcc88
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2
Electric Field of a Uniformly Charged Rod
  • Bashyboy
  • · Replies 11 ·
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11
Help With Science Fair; Calculating Force
  • IsaacFigNewton
  • · Replies 27 ·
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How Does Tension Vary in a Multi-Block Pulley System?
  • wcase
  • · Replies 4 ·
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Understanding Electric Flux and Field Lines in a Uniform Electric Field
  • aaronfue
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Compute Ratio for Luminosity to Mass: Compare to Sun
  • oldspice1212
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Finding potential between identical spheres
  • flip290
  • · Replies 13 ·
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Resultant Vectors and Equilibriant Vectors
  • ME_student
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Do sound waves get bigger when they bounce off a wall?
  • JazzyJones
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Thermal Stress Problem- not sure how to attack this one
  • RoKr93
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Waves & Light: Help with Homework
  • chipM
  • · Replies 12 ·
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Determining the possible time interval between two sine waves
  • randoreds
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6
Why acceleration is not 9.8m/s^2?
  • cmkc109
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Finding loss of sun's mass given the energy density delivered.
  • texan14
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Carnot Engine ~ Electric Generating station
  • Coti1002
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4
Write Vector Expression in n-t and x-y coordinates of Acceleration
  • Northbysouth
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3
Quantam Mechanic - Particle in a rigid one-d box (PDF)
  • MPKU
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How do you derive the correct projectile motion formula?
  • gmy5011
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Why does air pressure decrease with altitude?
  • salma17
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Determine the Velocity and Magnitude of Acceleration on the Wheel
  • Northbysouth
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Change in thermal energy and Temperature problem
  • laser123
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Volume of Silo bin with Cone top
  • zeshkani1985
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Finding The Effect of Several Electrics Fields
  • Bashyboy
  • · Replies 9 ·
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9
Conservation of momentum and Mechanical energy
  • ShizukaSm
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6
Where Do Electric Fields Cancel Out Between Two Charged Particles?
  • Bashyboy
  • · Replies 3 ·
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3
Quick SUVAT Check: Find Time for Particles P & Q to Become Level
  • Taylor_1989
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Equation for displacement in damped harmonic motion.
  • Craptola
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Projectile Motion Angle Problem
  • TRobison
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How are magnets able to attract each other?
  • sgstudent
  • · Replies 4 ·
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Comparison of T, E and V in different states?
  • theBEAST
  • · Replies 3 ·
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Velocity of satellite at specific altitude
  • Biosyn
  • · Replies 22 ·
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Electric field - Finding the charges
  • rm_girl
  • · Replies 1 ·
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Max velocity for simple pendulum oscillation
  • PhizKid
  • · Replies 5 ·
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5
What types of energies can be generated from fire
  • costa_1205
  • · Replies 1 ·
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Question regarding Coulomb's Law
  • sgstudent
  • · Replies 18 ·
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18
Electric potential problem with two plates and different points (i'll elaborate)
  • nadeem0322
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Rocket travels into space, emits sound - intensity/time question
  • fuzzy361
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Downward acceleration in an elevator
  • racecar12
  • · Replies 9 ·
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Distance and speed word problem. Introduction to vectors.
  • Nirupt
  • · Replies 9 ·
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Equation for speed of charges (electrostatics)?
  • devil0150
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Δt=6.7 s, Δx= .25 miles what is speed?
  • burton95
  • · Replies 6 ·
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How Do Charges Affect Electrostatic Force?
  • Bashyboy
  • · Replies 5 ·
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Space Dependence of Electric potential
  • PhysicsRob
  • · Replies 7 ·
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7
Difference between fluorescent strip and compact fluorescent lamp
  • moimoi24
  • · Replies 11 ·
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11
Calculating Thermal Expansion in a Steel Cable
  • has1993
  • · Replies 5 ·
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5
Rearrange Formula to Make r^2 the Subject - Homework Help
  • rad10k
  • · Replies 11 ·
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Using Projectile motion to find the distance above a wall
  • PensNAS
  • · Replies 4 ·
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Two moving objects; 1D; constant
  • burton95
  • · Replies 2 ·
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Projectile Motion Rocket Problem
  • TheRedDevil18
  • · Replies 15 ·
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What is the purpose of a voltage divider in electric circuit analysis?
  • GreenPrint
  • · Replies 5 ·
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Why is the girl and the sled accelerating in opposite directions?
  • dwdoyle8854
  • · Replies 4 ·
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4