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.
Voltage Null Points of a Mechanical Meter Bridge
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Electric field due to three point charges
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Deformable solids : Traction / Compression
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Magnetic field's effect on a charged particle's motion
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Dot product: ##\vec{D} \cdot\vec{E}## in SI units
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Reflection of sound wave in an open organ pipe
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What is the Proof for Newton's Law of Cooling Formula Using Quadratic Equation?
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Microstates for a gas of hard spheres in a box
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Facts about waves - UK BMAT exam question
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Finding kinetic energy and initial velocity of a cart over time
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Show that the solutions to the Fresnel Equation are real and positive
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Direction of motion of points on a rope as a wave travels
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A truck and a car coming to a stop
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F = ma for a lift (elevator) carrying passengers
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Electric field lines of H2O molecule
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Ideal index of refraction for single layer AR coating
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Electric Field acting on a point charge
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Electric Field as a function of r, evaluating bounds
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Boundary conditions ##\vec{B}## and ##\vec{H}##
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To find the angle between the ground and rods in limiting friction
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Calculate the total force on the Earth
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Does Acceleration Affect Tension in a Sphere and Car System?
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Pulley and weights hanging from spring balance
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2D kinematics -- Calculate the acceleration of the jumping athlete
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What's wrong with my solution? -- Area moment of inertia
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Correct Angle for FSW in Fabry-Perot Interferometer
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How to find the angle where the required pull is minimum?
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What is the tension in a rope when a monkey accelerates up?
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Motion of an Object: Displacement & Average Velocity
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Helix Angle or Pitch Angle for this Solenoid carring Current?
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Three weights and two pulley problem
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Verification of a problem -> force needed for car stopping in 1.8cm
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I understanding a concept about motor efficiency
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Time dependant Potential Energy in ion trap
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What is magnitude of dynamic force?
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Potential Difference over Capacitors in Series
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Question About a Test Charge Near a Conductor
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Disk with rod attached rotating about the center of the disk
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Clarification on magnetization and temperature
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Resulting force of an object with variable movement
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Gravitational Field and Potential at certain point
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What factors affect stopping and directional control in basketball shoes?
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Frequency of Oscillations of a Bead Resting on a Gas
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Question on a Gauss's Law problem
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Max initial angle so that the projectile range keeps increasing
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Derive ##\dfrac{\rho_1}{\rho_2}=\dfrac{T_2}{T_1}##
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Why Did My Second Approach to Finding the Block's Acceleration Fail?
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Boundary conditions (E and D) for a dielectric sphere
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Motion in two dimensions: Launching up an incline
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How should I calculate the distance D with two different motions?
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Work done on dipole and potential energy in uniform electric field
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Analyzing a constraint eqn for a pulley system
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How Do Pulleys Enhance Efficiency in Two Block Problems?
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Velocity, traveling distance and friction force on a sliding object
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Is Heat Transfer between 2 Walls Independent of Temperature Assumptions?
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Calculating attenuation necessary to reduce number of photons
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Calculating Energy From Charged Particles: 0.5869 J
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Max Angle of Mass on Incline Surface
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Need help with spring mass oscillator and its period
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Why are v and a decreasing as the oribit radius increases?
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How Does Friction and Acceleration Affect Tension in a Three-Block System?
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Calculating Work Done by Gas at Constant Pressure
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How much time does it take to warm up water?
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Inclined plane with pulley and spring
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Proving Sin(120) = Sin(60) with Trigonometry
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Coefficient of friction and normal force
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Hydraulic lifting force of this arrangement of pipes
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Finding potential at a point in capacitor
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I need an experiment about surface tension
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Finding Lagrange Point L2: Gravity and Harmonics
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Two Blocks, a Pulley and an Inclined Plane
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Optics. A laser beam is refracted in a piece of glass.
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Calculations for a Hammer Throw Event
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What is the relationship between angle and static friction?
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What Factors Affect the Acceleration of Hanging Bodies on a Pulley?
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Car's maximum acceleration on a road is proportional to what?
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Evaluating a cycle [Thermodynamics]
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Change in internal energy of a cylinder
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A sphere rolling without slipping down a hemisphere
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Estimating the velocity of seismic waves through an idealized Earth
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Triangles inside a circle to represent raypaths inside an ideal Earth
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Evaluation of heat and work for a stirred liquid
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Velocity along the cylinder axis
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Work to bring a charge to the center of two quarter circles
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Reasoning/evaluation: Free fall motion with constant acceleration
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Electrons and their little role in nuclear physics
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Finding the distance between two nuclei right after fission
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Is the image upright for a reflective spherical balloon using ray tracing?
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Using Kirchhoff's Rule - Theory question
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Contact and electromagnetic force
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Inverse square law of gravitation and force between two spheres
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Three-phase voltage inverter (some questions)
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Double Differentiation and Acceleration in a Four Pulley System
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Linear systems: Tmax = Umax is not making sense
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Plotting the graph of Friction Force vs. time (Laws of motion)
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Simple kinematics question -- Riding a bicycle race in two different gears
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Why Does the Second Block Accelerate Without an Apparent Force?
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PV Graph Question: Internal Energy Not Zero?
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A Trolley oscillates horizonally between two springs....
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The electric field from its electric potential: semicircle
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