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.
Why is magnetic field B along a straight wire circular not radial?
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Using Gauss's Law to Calculate Charge Density Function
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Magnetic flux with magnetic field changing direction
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Moving bar enclosing a changing magnetic field generates a current
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Gas law problem (changing volume, temperature and pressure)
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Correct vector diagram of forces
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Second moment of area of a hollow cylindrical arc
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Questioning the Solution for Elevator vs Rock Problem
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Magnetic flux of magnetic field changing as a function of time
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Calculate velocity in a "simple electric train"
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Direction of motion under the influence of friction
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Correct statement about elastic collision
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Applying the Work-Energy theorem to a system
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Converting centrifugal acceleration to frequency
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Are Individual Normals Irrelevant in Solving a Pulley and Wedge System?
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Friction causes a torque - then why do we sum it as a regular force?
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Is impulse negligible in this problem?
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A counterintuitive Laws of Motion problem
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Interpreting the various tracks in a hydrogen bubble chamber
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Normalizing the wave function of the electron in hydrogen
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How to Calculate Thermodynamic Equilibrium using Basic Principles
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What Formula Should I Use for Coefficient of Volume Expansion?
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Ultimate tensile stress of material
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Current calculation of a Y-junction
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How can l prove that Newton's laws are time invariant?
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Calculating Energy Released in a Fission Reaction: Where Did I Go Wrong?
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Required force to hold or pull inclined object downwards.
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Least count error Vs Least count
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Fictitious force in a binary stars
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Find the Upward Force of a Boat with 6 People Aboard
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Maximum duration of Solar eclipses
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Question about Elastic force and Buoyancy force
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How Does the Sign of ##dm## Affect Rocket Propulsion Calculations?
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Vacuum Pumps in Labs: Applications and Types
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Resultant pedal force (FRESULTANT) Force tangential to the crank arm
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How to calculate resultant force for a bike pedal stroke
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Kinetic energy of a composite body
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Find the magnitude and direction of the velocity
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Time to reach Max. Height for a kicked soccer ball
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What Determines the Direction of Motion in a Plank and Spring System?
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Induced EMF due to motion of a wire perpendicular to a magnetic field
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Motion of center of mass under gravity
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Question regarding Rolling with and without Slipping and Sliding
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System curve and Bernoulli equation problem
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Getting wrong answer in an (angular) impulse momentum problem
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Newton's laws--Block sliding up a frictionless semi-circular track
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Please help me pick a topic for an essay about classical mechanics
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Rocket Escape Velocity from the Earth-Sun system
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Why is perforated cathode used in the discovery of anode rays?
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How does energy affect the melting point of water?
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Is the Calculation of Thermal Energy in Mixing Water and Steam Accurate?
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Calculating eletric potential using line integral of electric field
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Where will the masses lose contact?
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Is energy conserved is this problem?
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What Is the Maximum Acceleration of a Crate Up an Incline Before Tipping Over?
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Is the pressure everywhere on the inflated fluid pad the same?
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Why do I have to take the moment at the cut to get the right answer?
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How Much Work to Fill a Cylindrical Tank with Water?
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Finding both temperature and the amount of gas added
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Measuring Pressure on a Concrete Table
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Initial velocity and angle when a ball is kicked over a 3m fence
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Light beam fired in a moving train (relativity)
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Two persons headed towards the black hole horizon
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Conducting rod in equilibrium due to magnetic force
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Acceleration of system related to rolling motion and pulley
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What is the mathematical model for a traffic shock wave?
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Time Dilation in the ISS: 2 Seconds in a Year
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Resistance of this circuit containing a Circular section
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Static Friction Question — A wood block sliding on a tabletop
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Car traffic producing shock wave
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Determine vertical velocity vector on sloped surface
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Biot-Savart equation for AC current
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Electron and hole concentration
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Calculating Relative Velocity of Two Boats in a River
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How Is Acceleration Calculated in Rotational Motion?
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Direction of friction on rolling object
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Electromagnetism — finding the current
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Derivative of ##\vec s = \vec \theta \times \vec r##
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Can you explain the correct way to choose axes for circular motion analysis?
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Solving a Physics Problem After 10 Years: Can You Help Phyler?
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Why doesn't this solution work? (Springs and Conservation of Energy)
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Oscillation with 2 springs attached to a mass
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The total resistance in a circuit
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Pendulum made with a Ball and two light strings
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Impact and the Coefficient of Restitution
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Analyzing Mass A's Direction of Motion
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Boltzmann distribution and ideal gases
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Friction Coefficients: Determining Force Direction?
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Finding number of significant figures
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Moving in a straight line with multiple constraints
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Find Flux Density On One Side of Dielectric Boundary Given Boundary Conditions
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Equation for an oscillating spring (w/ demping)
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Max amplitude of a diving board that will not toss a pebble off?
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Question about reflectivity and maximization of energy reflected
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Finding highest order number for a diffraction grating
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How to Maximize Inductance in a Coaxial Cable?
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Perpendicular inelastic collision problem
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Motion in Cylindrical Coordinates
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Finding Time with Work and Distance
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Projectile Motion of motorcyclist
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