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.
Position and acceleration in simple harmonic motion given velocity
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Rigid Body problem please help
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837
Equilibrium problem: Calculate the tension of each cord
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8
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I Thought I Understood Gauss' Law (Sheets)
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Determining field between oppositely charged conducting plates
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Coefficient of kinetic friction of a block sliding across the ceiling
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Understanding the Proper Uncertainty Formula to Use
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A water-bottle demonstration of atmospheric pressure
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Moment of inertia of a cuboid parallel to one of its faces (repost with diagram)
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25
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Average velocity for two different types of motion along same path
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22
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Heater power keeping a room constantly warm from low temperatures outside
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9
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844
Power delivered to wheels of car with constant air resistance
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Angular frequency of two hanging bobs of different masses
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Two concentric conducting spherical shells and resistor in between
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Linearizing a circuit with a nonlinear element
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1
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802
Work done by friction on a hockey puck
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4
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Work done on crate moving on incline
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28
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What does a Zener diode do in a circuit with non-ideal voltage source?
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Half life of multi chain decays
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676
Find thermal capacity of a Van der Waals gas
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1K
Why Is My Bungee Cord Tension Calculation Incorrect?
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15
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An optics question concerning pictures taken by camera
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27
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'Police Car Catching Up' problem in kinematics
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16
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Solving for φ on an oscillation problem
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17
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Two dimensional motion problem (kicking a soccer ball into the goal)
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3
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912
Potential and Electric Field near a Charged CD Disk
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2
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2K
(Help) Surface charge density (σ) for particle to hit plate...
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4
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Electric field strength and direction problem (need help)
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6
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1K
Moments question help requested, unsure where I went wrong
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4
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647
Relativity: Cosmic ray proton traveling to Earth
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12
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1K
Minimizing the Energy of Two Conductors Very Far Apart
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23
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How Do Signs Affect Energy Calculation?
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18
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Elastic collision with a massless box
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5
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648
Electric field on the axis of a ring-shaped charged conductor
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1
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1K
Moment of inertia of a rectangular prism parallel to one face
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11
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1K
Find the transit time of the train
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23
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British physics olympiad problem: A ball bearing bouncing off a steel cylinder
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2
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835
Question about the thermodynamic temperature scale
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2
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787
Why can we model spherical capacitor with two dielectrics as two capacitors in series?
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Conservation of Energy with springs
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Force on a charge from a nearby charged rod
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2
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990
Is my textbook wrong about absolute uncertainties?
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2
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Kinematics, curvilinear motion (a couple of questions)
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30
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Why Is the Electric Potential the Same for Inner and Outer Semi-Circles?
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7
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When Do Sand Particles Slip Off a Vibrating Plate?
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Help with this integral on page 34 of Analytical Mechanics by John Bohn
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4
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Help please with my understanding the solution of this mass on a vertical spring
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10
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Motion of a Parachuter (Terminal Velocity, Time of Flight, Distance)
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10
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What is the y-component of the force by the floor on her during the collision?
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15
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Max distance a truck can travel without box falling off
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Difficult problem in Rotational Mechanics JEE 2017 Comprehension paper
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Distance-time graph of a ball throw vertically up from a fixed point
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Find tension in string between two blocks on horizontal surface
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Solved: Help with a block sliding down an Inclined platform
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Why Does a Free-Falling Object Not Have Zero Final Velocity Upon Impact?
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Find the coefficient of friction and acceleration with masses given
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Two different dielectrics between parallel-plate capacitor
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Is This Electric Field Representation Accurate?
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How to answer this question, 21-cm emission line
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2
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976
Uncertainty Error and Significant Figures in this Force Tables Lab
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Constrained motion of a ring along a horizontal rod
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A 3.5 nC charge is at the origin and a -10 nC charge is at x = 2 cm
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Charge on inner/outer surfaces of two large parallel conducting plates
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Rating speeds from least to greatest from a position time graph
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Gravitation Potential Energy -- Questions about calculating the sign of GPE
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Calculating Time Dilation for Space Travelers
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How many independent components does a tensor have?
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Derivation Of Torque On Current Loop Due To Uniform Magnetic Field
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Understanding Inductance and Induced EMF in Simple Circuits
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Direction of the magnetic needle
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How Does Voltage Affect LED Color Through Band Gap Adjustments?
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Potential Mistake in Free-Body Diagram
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Errors in Experiment with Low and High Conductivity Materials
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State Space Representation of a 1D Point Mass Floating in Space and Actuated by Two Lateral Thrusters
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A confused Compass Needle between two solenoids
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Magnetic field pointing into a normal magnetized compass needle
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Deduction about Magnetic Poles surrounding a Conductor
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Tension Question with One Mass and Two Pulleys
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7
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Why Do I Get Negative Values Solving the SHM Spring Problem?
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3
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Hamiltonian Function thru new Variables Q,P -- Show that Q is cyclic
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Stretching of a rotating spring
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8
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A Question about the Double Atwood Machine
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16
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What Causes the Loss of Mechanical Energy in a Frictionless Spinning Cylinder?
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E&M: Forces resulting from Charges at the Corners of a Cube
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Compare the ratio of two times t1/t2 in this vertical jump
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Centripetal Acceleration while Swinging a Stone on a String
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Homework help: Dropping a sand bag from a Hot Air Balloon
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Physics Torque Equilbrium Question
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11
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How Does Longitudinal Stress Affect a Body's Internal Tension?
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How Do SI Units Affect Calculations in Fluid Statics?
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What Factors Cause a Water Container to Tip Over When Accelerated?
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Feynman's Lectures exercise about Newton's laws
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Air pressure changes in a vessel as the vessel volume increases
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Quantum Mechanics I, finding impuls wavefunction.
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Syntax Error? x and y components of E field in unit vector form
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Direction of current as bar magnet moves uniformly through copper ring
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What Does exp Mean in Mathematical Expressions?
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Time interval between intermediate passing of two rods....
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Intensity and electric field amplitude
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Electron bound to proton by gravity
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