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.
Possible to use work-energy theorem from a non-inertial frame?
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An expression for the vertical velocity as a function of time
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TIme needed for a capacitor to reach a fraction of its final charge
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Year 10 physics homework problem
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Notation in fluid dynamics: A circle with a horizontal bar inside
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Earth's Accel.: Is 10^(-22)m/s^2 Correct?
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Electrostatics help please -- Electric field, potential
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Conductivity and Electric Field relationship
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Connection of two photovoltaic cells to produce larger current
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Bobsled Impulse and Force -- ELASTIC collision problem
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Estimate the following quantities from a graph of the refractive index of NaCl
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Trouble finding the current through this resistor in the circuit
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MIT 8.01: Unwinding Drum Problem
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Problem involving interference and medium with index n
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I just wanted to know how to find error/uncertainties from the graph
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Acceleration between two frames
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Calculate force to open a door with a gas spring
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How Does the Definition of Work Affect the First Law of Thermodynamics Equation?
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How Do You Calculate the New Density of Kr in a Balloon?
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To calculate the forces on a composite body
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Derivation of single slit diffraction formula
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Speeds of the rolling ball at different points in this roller coaster track
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Interpreting Weird Results: J_u, P_1 and T_1
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Understanding the Coriolis Force: How to Calculate It
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Confused about which forces are external when Newton's Second Law is used
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Hinged rod rotating, falling and hitting a mass
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Compensating for Earth's Rotation With v = ωr
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Mass matters for standing waves on a string?
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Force acting on a charge across a hybrid medium
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Inverse-Square Law of Radiation
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Solving the Weight Puzzle: Explaining Why and How
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Seemingly simple equilibrium problem - force balance
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How to determine the same moment of inertia in two different ways?
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Proving that the incident intensity is not the same as the sum of others
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Dynamics problem about two-dimensional tug-of-war
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Using the sin function for a problem with a frictionless pulley and an incline
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Understanding the Physics of a=0 in u+at
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Do Radio Transmitters cause diffraction?
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What is the common error when discussing the photoelectric effect?
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Finding acceleration of block with block on top, connected by rope
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How Does Current Behave Over Time in AC Circuits?
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Speed and direction of proton after collision
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Why Does Fleming's Right Hand Rule Give an Upward Force on the Wire?
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How can I locate the coordinates of the centroid of a cone in Z?
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How to Calculate the Resistance of Nichrome in a Series Circuit with Graphite?
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What Quantum fields are in the intergalactic space ?
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How do dark spot and tiny hole filters affect Fourier optics images?
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Integration in angular momentum
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Why does it look dark between the distance stars at night?
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Can I power things even after Zener breakdown?
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Mechanical Waves Recorded after an Earthquake
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Special relativity, a train and a light pulse
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Mass swinging in a horizontal circle on 2 strings
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Current density in a wire that is being used to charge a capacitor
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How to find the amplitude of oscillations of a string with 5 beads?
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Labwork Statistics help: Average of averages
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Clausius-Clapeyron equation and absorbed heat
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Finding the value of the electric charge
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How can I plot the function g(x) = sin(πn/L) x and its corresponding g²(x)?
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How Does Energy Conservation Apply to MCAT Physics Problems?
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Zero velocity for a time interval, what about acceleration?
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Find the intensity as function of y (interference between two propagating waves)
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Design a combination of Capacitors
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Reflectivity coefficient of a composition of layers
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Back EMF vs Reverse Currents: What's the Difference?
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Finding the resultant force, moment, and x-y coordinates
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Where Did I Go Wrong in Solving for the Boat's Entry Time?
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Velocity of vertices of a free rhombus
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Does Dropping the Anchor Affect the Barge's Water Displacement?
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Question about the Magnetic Flux equation in Integral form
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Angular Velocity: Pulley and belt system
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Centripetal acceleration along a latitude of Earth
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Trace on the screen of a C.R.O. when a deflection coil is rotated
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Why is ##\text{flux} = \pi\text{intensity}##
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Relationship between horizontal range and angle of launch
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Internal Energy of an Ideal Gas
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Stick leaning on the wall, find the acceleration from the initial position
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How to calculate the normal stress of a Howe reinforcement?
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EMF and how it's related to Potential Difference
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Two observers viewed from different sources
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Ohm's law, current density, free & bound charge
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Calculating joint reaction forces
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Temperature rise without heat energy?
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Semi-circular cylinder and line charge
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Interference pattern of a fan of plane waves
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Beam current of positrons and electrons
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Variation of Electric Field at the centre of Spherical Shell
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Inertia Homework Help: Understanding the Concept of Stretched Objects
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Calculating Force and Work for a Penguin Climbing up an Ice Slope
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1-D Motion, calculating final velocity
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Finding Multiple Angles from Sine Values on the Unit Circle
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Constant frictional resistance & retardation
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Electrostatic potential and electric field of three charges
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Aerodynamics problem -- Hockey stick hitting another player
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Trouble with negative sign in this Potential Difference problem
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Motion of a Particle: Solutions & Examples
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Electrostatic potential energy of a non-uniformly charged sphere
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Elastic collision: Determine the deceleration
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Electron Trajectory: Stuck on a difficult problem....
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Pebble accelerated by the wind with a starting velocity
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