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.
Are the Force Equations for Rotational Motion Accurate?
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Particle projected from above a dome
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Avg Power in a Rotational Energy/Work Problem
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Centripetal force - Ferris wheel... Opposite results
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8
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Why Does Light Diminish with a Phase Difference of 5λ?
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Rolling Disk: dynamics versus energy analysis
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707
How to Calculate Water Leakage in an Inverted Bottle Experiment?
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What is the time taken by a pulse generated at the bottom of a string to reach the top?
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Determine the velocity of a package dropped from a satellite
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785
Finding force between solenoid and magnet
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703
Elliptical motion in polar coordinates
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10
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Why Does Calculating Torque at the Ladder's Contact Point Not Work?
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Cantilevered and line-loaded steel beam
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Proving the gravitational force of a solid sphere using integration
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Escape Velocity from Earth starting from its Centre
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Why Is Deriving the Motion Formula for Hoops More Complex?
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4
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Electron motion on axis of a charged ring
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7
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Work energy theorem problem -- Block sliding up a curved incline
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For a translating block with slipping find the maximum force F
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875
Fundamental electrokinetics problem calculation using Ohm's Law
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4
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803
Direction of electric field vector on the surface of charged conductor
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9
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2K
Rolling Motion (Stone Gets Stuck in a Tire Going Forward)
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Resonance of a cube floating on water under external force
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8
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948
Verifying that Newton's Equations are equivalent to the EL equations
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15
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Coulomb's law and energy - potential energy
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5
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834
Velocities of four masses | Conservation of Momentum
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7
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988
How Does a Pulley System Affect Scale Readings?
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8
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Intensity of central maximum when width of single slit is doubled
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13
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Deriving ODEs for straight lines in polar coordinates for a given Lagrangian
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8
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Force on rectangular loop by a current in a long straight wire
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4
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Net magnetic force on circuit segment due to 2 parallel wires
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6
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937
Measurements Calculation Problem
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3
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A massless disk with an embedded particle rolls down an inclined plane
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17
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Torque question in Deltoid muscle
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7
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Is this projectile motion situation possible?
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6
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How did Cavendish find the density of the Earth?
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24
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Average momentum of an avalanche
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5
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877
Finding the constants of the general approximate solution to a double pendulum
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1
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997
Calculate the average force on the side walls of a container
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5
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902
Find tension using sum of torque (two strings, one beam, one box)
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901
How do you prove ##\lambda = \frac {2L} {n} ## given only L?
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3
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975
Equation of resistance from given graph
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4
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1K
Uniform Circular Motion: A plum-bob makes a 70 degree angle...
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4
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Find the distance a particle travels
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Finding the x component of position vector
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3
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824
Uniform Circular Motion: Tension Force at Top of Circle
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Find the phase difference between these two sine waves
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Frames of Reference: Using tie-downs to hold a load on a flatbed truck
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3
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792
Phase difference between two light waves of the same frequency
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12
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1K
Wave movement and particle movement
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Finding focal length from di v. M graph
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590
Finding slip-off angle for mass off of sphere?
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7
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How Does Impulse Relate to Momentum Change in Physics Problems?
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Need help on a energy question: Hockey puck sliding across the ice
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Why Do Capacitors Behave Differently in Series and Parallel Configurations?
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Effect of different magnetic fields on a magnetic dipole
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Planar Coil Rotating in a Magnetic Field
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Electromagnetism problem: Merging of 2 charged drops of mercury
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Need help finding uncertainty for this equation
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Find the velocity of the stone just before it hits the ground
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Two blocks in contact -- find the force between them
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Can You Accurately Compare Bearing Slow Down Functions?
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543
Help Calculating probability between 2 limits for the ground state
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POWER - different approach, different results
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Help needed in this problem involving a spring and energy balances
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888
How Does an Iron Deposit Affect Water Levels in Fluid Mechanics?
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When does Phobos collide with Mars?
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Calculation of torque and force on magnetic dipole near infinite wire
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Calculation of magnetic dipole moment of the Earth
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939
Final Charge of a Capacitor in a Circuit with Capacitors and Resistors
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Does a Slowing Piano Exert More Force Than the Man Pushing It?
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Why is a current ring approx a magnetic dipole from very far off?
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Where on a rigid body is a resultant force applied?
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Prove this equation for projectile motion
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How Does Stress Affect a Hollow Pipe When Force Is Uniformly Applied?
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Understanding MIT's applet on sound with Fourier coefficients
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Find moment arm of resultant force of two forces applied at two points
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A sphere suspended from a cord -- Find the tension
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993
How Is Potential Energy Converted to Kinetic Energy in Physical Systems?
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Why don't we find the angular magnification of objective lens in microscopes?
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Physics 1 Parabolic Motion Question Confusion
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Acceleration in uniform circular motion is uniform or non-uniform?
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Difference between resonance in undamped vs damped mass-spring-dashpot
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Amplitude of harmonic oscillation given position and velocity
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Modeling a mass falling from one side of the Earth to the other
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Elastic Potential Energy - Positive or Negative?
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How Do You Solve a Non-Equilibrium Pulley System with a 154 Degree Angle?
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Where Did I Go Wrong in My Refraction Problem Solution?
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Conservation of energy problem: Ball rolling down inclined plane and then through a loop-the-loop
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Elastic potential energy - different methods, different results
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Work Done and Acceleration (Mistaken Answers?)
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5
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732
Faraday's law help -- Induced EMF vs. time graph
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How can I find the sustain time of an electric guitar?
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7
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On what does gravity assist depend? (possibly with sources)
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Calculation of the magnetic field of four quarter circles
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Magnetic Field Due To Wire Of Semi-Circular Cross Section
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Calculate the gravitational force between these three masses
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4
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814
Vectors Directions: Where is this Resultant Vector Pointing?
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Momentum Physics Problem: Two astronauts throw billiard balls that collide
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Understanding work in translation and rotation of a magnetic dipole
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