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.
Relationship between horizontal force and friction in an exercise
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Classical mech. - inelastic collision
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Find the unkown tensions and masses in the situation below
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Is Solar Radio Flux dependent on Spectral Class?
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The normal force on a thin stick being lifted on a surface
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Magnetic Field due to a curved wire
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What was the mistake in solving for the speeds of two marbles after a collision?
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Why is the square root of x^2 = |x|?
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Finding an open-cicuit voltage, why is resistor in series ignored?
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What helium mass in a balloon to make it bouyant in air?
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Graphing Elastic Potential Energy
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Why Isn't the Right Side Negative in a Vertical Spring-Mass System Equation?
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Point particle model for a person pushing a block on ice
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What Are the Differences Between Black Body Radiation Formulas?
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Misunderstanding Work-energy theorem and center of mass properties
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Tension in a string being pulled from both ends
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Gravitational acceleration magnitude - confused
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Brownian Ratchet (exercise framed by Feynman's Lectures, l. 46)
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Wavelength of traveling wave on string (one end clamped and one end free)
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Physics puzzle about the concentration of fog droplets in the air
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Showing Complex Vectors are Orthonormal
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Oscillation of free surface of water in parallelepiped container
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Find the diameter of the piston at certain heights
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Conservation of momentum for a robot on a space platform
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Oscillation with friction - Analytical mechanics
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Calculating the central temperature of the Sun using the ideal gas law
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Projectile motion when only given distance and acceleration
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Projectile motion only provided acceleration diatance
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Work done in a chamber with gas undergoing adiabatic free expansion?
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Confusion on product rule for mass of differential volume element
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Is my understanding of nuclear fusion and binding energy correct?
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Well of Death: Physics behind it
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Gauss' law and Faraday cage problem
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Pulley system and energy conservation?
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Four Snails Traveling on a Plane -- Do they cross paths?
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Work done on container receiving gas from high pressure container
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Acceleration of stacked blocks on an inclined plane
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Finding value of g given a motion map
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Concave mirror reflection, problems with drawing setup
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Finding the magnitude (length) and direction (angle) of a vector
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Find the location knowing the resonance using Kepler's third law
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Equilibrium of Forces and Torques on Sawhorses Supporting a Person on a Board
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Where Should the Pivot Be Placed to Balance a See-Saw?
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Integral for work done leading to potential energy sign confusion
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How to find current direction when analysing a cricuit using KVL, KCL
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Calculating Flywheel Inertia Using Conservation of Energy Equations?
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Calculating the flux of a vector field
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Expected value of momentum P in terms of k
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Advice needed for producing a water powered car model project
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Inclined Plane Vector Problem: Understanding the Use of Trigonometric Functions
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Finding shortest distance between an observer and a moving object
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Change in reading of the scale when putting ball in a container of alcohol
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What is the problem with the units in this state equation of a gas?
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Finding acceleration of a crate when applying a force at an angle
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Vector addition, trying to find the angle
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Is My Calculation for Bicycle Pump Pressure Incorrect?
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Calculate the following commutator [[AB,iℏ], A]
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Golf club 🏌️and ball ⛳ impulse problem
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Efficiency of Energy Transfer in Swimming: Wall Kicking vs. Water Kicking
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Centripetal force direction confusion
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“Chasing Vertices: A Time-Bound Pursuit Problem in a Square”
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2 pullies and 3 masses -Tension
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Frames of Reference: Find the speed and heading of the airplane
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What is density of dark matter as a function of distance from the galactic core?
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How do you calculate the terminal velocity of these two balls?
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Derivation of time period for physical pendula without calculus
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How Do Electron Transitions Correspond to Energy Levels in Quantum Wells?
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How do tides vary over a lunar cycle?
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Potential barrier problem in mechanics
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Acceleration of a tank leaking water
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Calculate center of rotation of monocopter
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Solving 2-D vector along three directions (say at 0,60 and 120 degree)
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The Relationship Between Masses and Angles in a Pulley System
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Solving Orbital Speed with Energy & Angular Momentum Conservation
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What is the mass of the Galaxy's core?
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Introductory physics: Time for a ball thrown vertically to reach maximum height
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Transmission cable problem involving power loss
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Effect of relative motion on pressure of gas in a container
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Change in momentum: Child jumping from a swing on a playground
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Confusion regarding centripetal acceleration and tangential acceleration
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How Does Angular Momentum Conservation Affect Asteroid Collision Dynamics?
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SUVAT equation question: When will the car collide with the lorry?
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Is My Calculation of Centripetal Acceleration and Tangential Velocity Correct?
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Hooke's Law using Potential Energy
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Forces acting on a box-pulley system in an elevator?
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A loaded railroad car is rolling at a constant velocity
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Work done during quasi-static, isothermal expansion from P_i to P_f
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Potential associated with a conservative force field F
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MIT OCW 8.01 PS10.6: A Massive Pulley and a Block on an Incline
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Using Momentum Principle to Find Ratio of Speeds?
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Using Momentum, KE and PE to solve this skier velocity problem
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Newton's Second Law (Pulley Sustem)
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Apparent weight of body immersed in liquid
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How Do I Determine the Center of Mass in This Situation?
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In a constant acceleration motion, Is it possible to have constant speed?
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Is Exponential Form Better for Balloon with Inserted Load Calculation?
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Motion in straight line in bungee jumping
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Springs connected to a mass in series?
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What is a spring constant of 20 N/m used for?
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Finding an application where an air/n-octane mixture is cooled
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