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.
Problem understanding solution of a question about a hydrogen-filled balloon
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Why body A has greater acceleration?
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Calculus Problem: Blowing Up a Spherical Balloon
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The phenomenon of the ruler trick
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Discover the Correct Star Radius with These Key Answers | Choose Wisely!
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Projectile Motion Question (Envelope of trajectories) query
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Viscosity by Falling Sphere Equations
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Parallel Axis Theorem Not Working
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Arrange bulbs in descending order of brightness
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Force field in spherical polar coordinates
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Actual Working of Weighing Machine (Normal vs gravitational force)
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Which Spring Constants to Use for Magnet Oscillation Experiment?
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How to Solve Dynamics Exercise Involving Force Representation?
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Matrices: a normal M, a projection Q, Hermitian transpose of product
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Does a signal called "EN" stand for something special in this circuit?
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How Does Dimensionality Affect Phonon Polarizations?
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Carnival Swing Question, I am severely stuck
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A charge inside a ring, small oscillation
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Importance/Use of Gauss' Law and Ampere's Circuital Law
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What are the voltages generated from this current source?
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Problem on Differential Pulleys
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Plot ##i_A## vs ##v_A## characteristics for this nonlinear network
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Distributed weight of inclined beam.
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What is the angle of static equilibrium for a ladder on ice?
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Calculate the resistance to add in parallel to balance this bridge circuit
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Find the amount of work done against gravity in moving a 150kg rocket
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What is the most effective nozzle size and water speed for maximum thrust?
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Finding electric potential of an infinite line charge at z axis
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Seeking advice on "simple" pendulum problem
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Question about a problem from 'Optics' by Eugene Hecht
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Frequency of oscillations given 3 springs at angles ##\frac{2\pi}{3}##
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What is the power per square meter of a sun on a planet?
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Find the Retarding Force due to Eddy Currents
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Block on slope. Different answers using energy vs forces
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Why are the forces on torque tension and not the weight of the mass?
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Speed of ball on pendulum with Mechanical Energy
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Time period of SHM & Energy conservation in pulley-spring-block system
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Varying fluid (density) in a cylinder rolling along an inclined plane
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Torque before slipping in a refrigerator
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Friction between tractor tyres and the ground
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Does a massless string cause a normal force when attached to a wall?
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Vertical Velocity Graph versus Time on a Slope
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A particle moving in a parabolic path in the ##x-y## plane
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Finding current of circular (toroidal) solenoid
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Problem involving space elevators
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Calculate a radius of a circle on a screen
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Circular motion of a rollercoaster car on a loop-the-loop
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Maximum voltage in the primary circuit of a transformer
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How Do You Solve for Final Velocities in Elastic Collisions?
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How can the coefficient of friction change? Does it?
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Understanding Energy Loss of 2 Joules in Circuits with Changing Capacitance
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Why does this question make this simplifying assumption?
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Alpha particle close to the nucleus
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Thermo Final Review - specific heat for ideal gas
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Confused on whether this counts as an external torque
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Does Mechanical Energy of a Planet Change in an Elliptical Orbit?
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Flow rate experiment not producing same results as the Hagen-Poiseuille law?
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Two stars orbit their common center of mass
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Point charge with very thin metal sheet along a spherical surface
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Pushing a block against the wall of an elevator that is accelerating
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Analytical mechanics- working with Lagrangian and holonomic constraints
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Question on height of a jump in terms of Power (from WPE chapter, JEE level)
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Angular momentum of rotating hoop
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What is the maximum current in a RL circuit using V=IR?
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Q2: In a relative non-inertial reference frame, why is fluid velocity zero?
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Calculate the spring constant of oscillating mass on a spring colliding with a wall
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Why can we move the spring with constant speed when we apply a force?
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Pearson HW23, The Little Prince
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Relation between Mutual information and Expectation Values
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Write boolean expression describing this circuit
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Sinusoidal Radiation Statements (T/F)
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Q: In a relative non-inertial reference frame, the fluid velocity is zero?
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Spring Problem Involving Variables and Constants Only
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How would we define a value for acceleration if only the direction is changing?
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Show that the Poiseuille field of flow is rotational
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Make 2 launchers that shoot a straw with clay at the end
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What can I add to a Taekwondo body protector scoring systeme to be more stable?
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Is the Final Velocity of a Fly Impacted by an Elephant's Mass?
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Torque in a parallel combination of springs
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1999 AP Physics C Mech: Conservation of momentum and energy
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Find the linear speed of the particle when system rotates about axis
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Find the equation of state of each gas
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Scarf modelled as a pulley system / F=ma exercise
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Challenging problem about an impact with a smooth frictionless surface
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Energy of a water tank with compressed air
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Inflating a Balloon (elastic balloon vs. paper balloon)
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Confused about resolving Tension and Weight
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The biomechanics of elbow extension
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Minimum force required to keep two blocks from not falling
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Derivation of angular velocity using the unit circle
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Interesting question: design of a truck-based crane
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How Does Induced Current Change with Loop Acceleration Through a Magnetic Field?
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T-Shaped Pendulum: Find the Total Mechanical Energy
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Conservation of Energy with Gravitational Potential Energy
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Homework help : The difference between these 2 circuits
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Static vs Kinetic Friction on an Unbanked Ramp
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Moment of Inertia of a Disc: Is it paradoxical?
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Calculating Forces in a Leg: Gait Analysis and Joint Reaction Force
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Would one be pushing as much as their weight?
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Confusion in using the continuity equation here
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