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.
Calculate the time to reach the floor in seconds
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Gravitational Forces between two masses
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Understanding the Use of the Long Jump Formula R=9.21m and Its Derivation
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At what frequency can Planck's law be used to determine the temperature?
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Newton's second law -- Crate sliding in the back of an accelerating truck
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When will the particles collide?
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Solving for Distance, Velocity and Acceleration
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The relationship between angle and static coefficient
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Help finding the magnetic field of a current loop
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Induced Current Direction in a Changing Magnetic Field
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Spring potential and kinetic energy
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Verifying properties of Van der Waals Gas
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Relative Velocity of a Passenger Hitting the Dashboard in a Car Crash
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Total work done while pushing a wheelchair
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Projectile negative vertical displacement
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A piece slides down a slippery plane plane slowing from 10 km/h to 5km/h -- what is the friction coefficient?
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The binding energy per nucleon of tritium
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Circuit Design Help: Progress & Resources
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Find Final Kinetic Energy of a particle subject to two forces
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Calculate the electric field due to a charged disk (how to do the integration?)
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Peak of the amplitude resonance curve
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Applying Newton's 3rd Law to Tension in a Tug of War
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Forces and laws of motion -- Big gorilla hanging from two vines
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Electric field created by two charged circular arcs?
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Phase factor in quantum mechanics
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Buoyancy: Will the Object float or sink or remain at a depth?
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Motion in 1D-Graphs: Is Option D Correct?
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How to choose the correct function to use for a Taylor expansion?
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(Movement Homework) What is the speed of a marble falling on the moon?
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Newton's laws — Two stacked blocks sliding on a frictionless floor
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Impulse-momentum theorem problem
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Spring deflection problem using energy equations
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Progressive wave, wavelength moving in the opposite direction
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Newton's laws of motion -- Force of gravity on a skydiver
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A particle motion problem in the x-y plane with constant acceleration
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A stone projectile hitting the target
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Designing an orifice plate to increase the pressure in a pipe
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MIT OCW 8.02 Electromagnetism: how were these two limits calculated?
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Angle observed in rest frame related to relativity
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Why is time = ct and not t in special relativty?
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I'm Stuck on Solving This - R2 Confuses Me
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Solving for Time Given Acceleration & Initial Velocity
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It seems like it's simple math but I'm not sure?
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Help with unit vector for a magnetic field
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Why doesn't any coloured body get infinitely hot?
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How can I calculate the potential energy stored in a compressed spring?
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Calculate gravitational acceleration without mass of both objects
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Computer Science Help C# or Java
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Forces acting on a car on an incline
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Lab Experiment - Puck Impact on Wall, Analyzing Force
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Does element x present a linear resistance?
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Using suvat to find time traveled by a cannonball
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Dimensional Analysis: Solving Confusing Steps
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Trouble with Part B of Physics Problem: Velocity
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Mechanics: calculating launch angle of projectile
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Working out steam velocity with only pressure difference
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Problem in evaluating the absolute error
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What Determines Maximum Tension in a Cord Between Two Blocks on Inclined Planes?
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Is the force exerted by a pivot always towards the center of mass?
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What is the correct angle of displacement for a clock arm?
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What is the definition of potential energy of a system?
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How can two cylindrical lenses can be used to form a laser sheet?
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Gravitational force equals centrifugal force?
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Special relativity and simultaneity: Spacecraft and Target
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Different forms of Biot-Savart Law
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Fluid flow inside a cylindrical tank
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How does a mass moving up a ramp change its velocity?
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The Net Electric Field Inside a Dielectric
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How to calculate differential work done by a force in circular motion?
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To find the forces on a composite object
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Calculating magnetic field given dl, current, and radius vector
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What Mistake Was Made in Finding the Speed of the Boxes?
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Mass slipping on a moving inclined plane
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Free Body Diagram for a Piece of Gum on the Underside of a Desk
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Why Use bh/2 for the Area of a Non-Right Triangle?
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2 bodies spining and cut in the middle
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Are My Inductor Equations Correct?
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Calculate the dose rate in a drum of U3O8
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Electrodynamics for a rotating ring
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Speed/Velocity and Volume Flow Rate of Viscous Fluids
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Calculating the Number of Lines for a Diffraction Grating
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Minkowski diagram, where to put an event
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Choosing an Axis of Rotation for Equilibrium Analysis
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Pressure due to a Liquid on container Wall
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What happens to a ball placed on a moving conveyor belt?
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What kind of motion is this? (bicycle velocity vectors)
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[HW question] Image size difference of two light emitting nanospheres
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Gauss' law and flux concept issues
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[Optics] Compound microscope (homework quiz)
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Inside glass, can I apply relativity of speed for light?
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Question about the average acceleration
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Rod colliding with the ground (Special relativity question)
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Error calculation in a measurement chain
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Is there any friction in this case?
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Electric field problem -- Repulsive force between two charged spheres
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Compression Q&A: Answers to Common Questions
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Coefficient of kinetic friction
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DC Motor Efficiency: Why Does Efficiency Plot Look Like Parabola?
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Resultant Frequency and Wavelength of Interfering Sound Waves
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Solve Motional EMF Problem: Total Resistance, V(ind), I(ind), and Fnet Explained
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