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.
Gauss' Law for a conducting / non-conducting sheet
  • laser
  • · Replies 5 ·
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5
Is the Charge Conservation Correct in This Meson Decay Feynman Diagram?
  • songoku
  • · Replies 8 ·
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8
Find the value of ##t## when ##P## returns to ##X##- Kinematics
  • chwala
  • · Replies 25 ·
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25
Find the tension in the rope PQ
  • chwala
  • · Replies 7 ·
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7
How Do You Correctly Cancel Angular Momentum in Physics Problems?
  • pbnj
  • · Replies 3 ·
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3
Question about acceleration of free fall
  • hello478
  • · Replies 23 ·
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23
Calculate voltage over capacitor and resistance
  • Sailhill
  • · Replies 7 ·
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7
Solve the problem involving the velocity - time graph
  • chwala
  • · Replies 3 ·
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3
Question about the energy of 2 blocks with a spring between them
  • hello478
  • · Replies 12 ·
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12
How Is Work Calculated on a Conveyor Belt with Friction?
  • hello478
  • · Replies 53 ·
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Find the initial velocity ##U##
  • chwala
  • · Replies 3 ·
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3
How Does Energy Transform in a Bungee Jump?
  • hello478
  • · Replies 7 ·
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7
2 Masses and a Wheel (with mass)
  • PhDeezNutz
  • · Replies 6 ·
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6
Horizontal force by block on a beam
  • hello478
  • · Replies 45 ·
2
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45
Calculate the frequency of rotation when a coin flies off a turntable
  • M1N
  • · Replies 8 ·
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8
Trouble solving for end state of two control volumes in a rigid tank
  • calzone41
  • · Replies 12 ·
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12
Help again in interpreting a pulley with a spring and a block
  • tellmesomething
  • · Replies 52 ·
2
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52
Find the value of ##T## and distance of particle in the first ##4## seconds
  • chwala
  • · Replies 2 ·
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2
A small disk and a bigger half disk
  • billtodd
  • · Replies 9 ·
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9
Making sense of sequence of ideas in MIT OCW's 8.02 notes on Faraday
  • zenterix
  • · Replies 1 ·
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1
Rotating ball and string Rotational Kinetic Energy?
  • Vontox7
  • · Replies 6 ·
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6
Why Isn't the Spring Force Sum of Both Ends?
  • cestlavie
  • · Replies 5 ·
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5
What is the induced magnetic force on this closed current loop?
  • zenterix
  • · Replies 12 ·
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12
Calculating the spring force constant K
  • lingo
  • · Replies 14 ·
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14
Determining Inductance L in an LC Circuit
  • dragonshadowbob
  • · Replies 5 ·
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5
Power, force, velocity and tension...
  • hello478
  • · Replies 38 ·
2
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38
How Do Power, Force, and Velocity Interact?
  • hello478
  • · Replies 14 ·
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14
The ratio between two horizontal speeds in this pendulum arrangement
  • billtodd
  • · Replies 1 ·
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1
Inelastic collision of two squares
  • billtodd
  • · Replies 14 ·
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14
Two bodies connected with an elastic thread moving with friction
  • HighPhy
  • · Replies 6 ·
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6
How to obtain correct negative sign in calculation of motional emf?
  • zenterix
  • · Replies 2 ·
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2
Normal force at the base of a ladder
  • iceice655
  • · Replies 20 ·
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20
How Does Spring Compression Relate to Energy Changes?
  • hello478
  • · Replies 4 ·
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4
Arrow being fired to centre of target
  • hello478
  • · Replies 6 ·
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6
Change in the kinetic energy of a car driving up a hill
  • hello478
  • · Replies 3 ·
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3
Horizontal force on hinge is affected by moving the block farther away?
  • hello478
  • · Replies 11 ·
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11
Need help interpreting a spring-block problem
  • tellmesomething
  • · Replies 35 ·
2
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35
Force components for mass attached to two springs
  • giraffe714
  • · Replies 15 ·
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15
Molecular speed distribution - most probable speed V
  • greg997
  • · Replies 13 ·
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13
Which way does this coil turn in a magnetic field?
  • maxelcat
  • · Replies 2 ·
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2
Compare rotational inertia of 2 paper cups in 2 diff orientations
  • dcmf
  • · Replies 12 ·
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12
Are the Force Equations for Rotational Motion Accurate?
  • Bling Fizikst
  • · Replies 24 ·
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24
Particle projected from above a dome
  • Bling Fizikst
  • · Replies 38 ·
2
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38
Avg Power in a Rotational Energy/Work Problem
  • dcmf
  • · Replies 6 ·
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6
Centripetal force - Ferris wheel... Opposite results
  • Iamconfused123
  • · Replies 8 ·
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8
Why Does Light Diminish with a Phase Difference of 5λ?
  • femaleinstemneedhelp
  • · Replies 6 ·
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6
Rolling Disk: dynamics versus energy analysis
  • Taulant Sholla
  • · Replies 9 ·
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9
How to Calculate Water Leakage in an Inverted Bottle Experiment?
  • evelynhott
  • · Replies 55 ·
2
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What is the time taken by a pulse generated at the bottom of a string to reach the top?
  • hdje
  • · Replies 8 ·
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8
Determine the velocity of a package dropped from a satellite
  • madsb2
  • · Replies 6 ·
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6
Finding force between solenoid and magnet
  • Mitchell Richardson
  • · Replies 2 ·
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2
Elliptical motion in polar coordinates
  • lorenz0
  • · Replies 10 ·
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10
Why Does Calculating Torque at the Ladder's Contact Point Not Work?
  • sachin
  • · Replies 5 ·
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5
Cantilevered and line-loaded steel beam
  • Kalle
  • · Replies 19 ·
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19
Proving the gravitational force of a solid sphere using integration
  • Sam Jelly
  • · Replies 5 ·
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5
Escape Velocity from Earth starting from its Centre
  • Priyo137
  • · Replies 27 ·
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27
Why Is Deriving the Motion Formula for Hoops More Complex?
  • lsie
  • · Replies 4 ·
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4
Electron motion on axis of a charged ring
  • Ben2
  • · Replies 7 ·
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7
Work energy theorem problem -- Block sliding up a curved incline
  • tellmesomething
  • · Replies 10 ·
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10
For a translating block with slipping find the maximum force F
  • annamal
  • · Replies 2 ·
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2
Fundamental electrokinetics problem calculation using Ohm's Law
  • annin
  • · Replies 4 ·
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4
Direction of electric field vector on the surface of charged conductor
  • laser
  • · Replies 9 ·
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9
Rolling Motion (Stone Gets Stuck in a Tire Going Forward)
  • amandela
  • · Replies 10 ·
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10
Resonance of a cube floating on water under external force
  • tanhanhbi
  • · Replies 8 ·
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8
Verifying that Newton's Equations are equivalent to the EL equations
  • Hamiltonian
  • · Replies 15 ·
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15
Coulomb's law and energy - potential energy
  • laser
  • · Replies 5 ·
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5
Velocities of four masses | Conservation of Momentum
  • I_Try_Math
  • · Replies 7 ·
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7
How Does a Pulley System Affect Scale Readings?
  • orazon
  • · Replies 8 ·
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8
Intensity of central maximum when width of single slit is doubled
  • songoku
  • · Replies 13 ·
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13
Deriving ODEs for straight lines in polar coordinates for a given Lagrangian
  • Hamiltonian
  • · Replies 8 ·
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8
Force on rectangular loop by a current in a long straight wire
  • cherry
  • · Replies 4 ·
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4
Net magnetic force on circuit segment due to 2 parallel wires
  • risakapal
  • · Replies 6 ·
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6
Measurements Calculation Problem
  • Ascendant0
  • · Replies 3 ·
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3
A massless disk with an embedded particle rolls down an inclined plane
  • annamal
  • · Replies 17 ·
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17
Torque question in Deltoid muscle
  • dcmf
  • · Replies 7 ·
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7
Is this projectile motion situation possible?
  • McMaster27
  • · Replies 6 ·
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6
How did Cavendish find the density of the Earth?
  • marc873a
  • · Replies 24 ·
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24
Average momentum of an avalanche
  • I_Try_Math
  • · Replies 5 ·
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5
Finding the constants of the general approximate solution to a double pendulum
  • giovanna
  • · Replies 1 ·
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1
Calculate the average force on the side walls of a container
  • patric44
  • · Replies 5 ·
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5
Find tension using sum of torque (two strings, one beam, one box)
  • dcmf
  • · Replies 2 ·
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2
How do you prove ##\lambda = \frac {2L} {n} ## given only L?
  • Danielk010
  • · Replies 3 ·
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3
Equation of resistance from given graph
  • Aurelius120
  • · Replies 4 ·
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4
Uniform Circular Motion: A plum-bob makes a 70 degree angle...
  • daisy7777
  • · Replies 4 ·
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4
Find the distance a particle travels
  • figuringphysics
  • · Replies 15 ·
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15
Finding the x component of position vector
  • hraghav
  • · Replies 3 ·
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3
Uniform Circular Motion: Tension Force at Top of Circle
  • daisy7777
  • · Replies 4 ·
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4
Find the phase difference between these two sine waves
  • hello478
  • · Replies 21 ·
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21
Frames of Reference: Using tie-downs to hold a load on a flatbed truck
  • daisy7777
  • · Replies 3 ·
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3
Phase difference between two light waves of the same frequency
  • hello478
  • · Replies 12 ·
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12
Wave movement and particle movement
  • hello478
  • · Replies 23 ·
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23
Finding focal length from di v. M graph
  • blank44544
  • · Replies 1 ·
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1
Finding slip-off angle for mass off of sphere?
  • giraffe714
  • · Replies 7 ·
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7
How Does Impulse Relate to Momentum Change in Physics Problems?
  • wgajtdb311
  • · Replies 7 ·
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7
Need help on a energy question: Hockey puck sliding across the ice
  • sky
  • · Replies 9 ·
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9
Why Do Capacitors Behave Differently in Series and Parallel Configurations?
  • sdfsfasdfasf
  • · Replies 20 ·
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20
Effect of different magnetic fields on a magnetic dipole
  • zenterix
  • · Replies 25 ·
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25
Planar Coil Rotating in a Magnetic Field
  • bab72
  • · Replies 1 ·
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1
Electromagnetism problem: Merging of 2 charged drops of mercury
  • Elj
  • · Replies 2 ·
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2
Need help finding uncertainty for this equation
  • User849483
  • · Replies 23 ·
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23