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.
Failed rocket problem (momentum conservation, Kleppner 4-4)
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Can a Falling Mass Generate 12V Using an Optimal Magnet and Coil?
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Double pendulum Lagrangian using small angle approximation formula
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Euler- Lagrange equation proof
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Find temperature of a U-shaped Tube
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How far do acorns drift in the wind?
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Rpm and power for this electric motor, gearbox and pulley system
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Normalising the wavefunction - two answers
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Relationship between linear velocity and angular velocity
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Is the Solution for Rotation of Spherical Mirrors Incorrect?
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How can I determine the instant the block overcomes static friction?
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General question about the definition of moment of force (Torque)
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What's the pressure long before the fluid exits a pipe?
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Oil enters a flexible bend in a pipe -- calculate the force needed to hold the bend in place
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Induced charge on a conducting sphere sliced by a plane
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Time it Takes for a Transverse Pulse to Travel a Distance "L" Up a Cable Against Gravity?
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Question about the current components inside the Corbino disk
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Pressure just before the exit hole in a draining tank
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Find the coefficient of friction between block and surface
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820
Block and wedge problem -- Where am I going wrong?
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7
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1K
Potential Energy Problem: Pulling a Chain up onto a Table
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What is the maximum length of the spring?
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Need some confirmation regarding induced currents
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969
LASER Applications help please
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943
Which movement has the greatest net work done?
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858
Calculate the area of this pond with functions given for the perimeter
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Why are the electrostatic field lines normal to a charged conductor?
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Electric field of a sphere and a shell
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Rigid body dynamics: A rod with two masses rotates down from a horizontal starting position
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Equivalent Resistance of Cube of Resistors: A to B
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5
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This question caused a debate in the class: EMF from a changing magnetic field
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Net force between two conducting strips
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6
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Is My Answer Correct for Calculating Average Current on a Ring?
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8
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Correct Setup for Finite Difference to Calculate Quantum Tunneling
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2
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Confused about interefence patterns
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Magnetization of a paramagnetic sphere
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Help with a Physics car project please
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2
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920
Solving projectile motion problems using Lagrangian mechanics
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9
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What distance will be covered before coming to stop?
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12
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Motor rotating at normal speed and then prevented from rotating
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2
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718
Force between charged particle and conducting cylinder
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Tension in a deformed cylindrical bag on a surface
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Finding the shape of a hanging rope
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Two launches ferrying between two landing stations along a river
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Calculate how fast the car was travelling when brakes were applied
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Contact Mechanics: Deformation of a ball on a surface
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How to calculate the velocity of water streaming into the boat?
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Difficulty Understanding 'Drag Crisis' (transitionary period from laminar to turbulent flow)
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Issues with SLS Model for Rubber and Foam Compression Tests
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Stress on a spaghetti rod balanced from its middle
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How to calculate the degrees of freedom of a simple multi-body system?
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What Force must be exerted on the trolley for constant speed?
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Two objects joined by a rectilinear cable rotating
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Oscillation of system of three charges
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Bees and Trains: A distance problem
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Extension of spring in a system with two pistons
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Classical Mechanics: Rocket Propulsion Calculation
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Missing negative sign in my textbook's answer?
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Spaceship, Earth and proton problem in special relativity
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Quantum - Postulate of getting specific momentum p = |A_p|^2
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Effect of temperature on surface tension
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Need maximum weight on an extension machine
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Finding a formula for displacement of a mass on a spring using v.
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Correct Derivation of the Adiabatic Condition? (PV Diagram)
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An "x" from nowhere, mistake by textbook? (induced voltages)
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Shape of equipotential surface in 3d
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A problem in this photoelectric effect experiment
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Problem in understanding angular momentum of a rigid body
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Shape of Slinky being twirled in 0 gravity
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Two Trains and a Bee: Distance Question
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A falling resistive disk in uniform magnetic field
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How can I maximise the exit velocity of an object catapulted up?
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Which block reaches the wall faster?
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Is this a mistake in my textbook's answer about induced voltage question?
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Horizontal component of the Coriolis force
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Flux linking (and de-linking?)
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Force on a rotating wheel/disc
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Magnus Effect Equations and Mechanics
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Forces involved in principle of virtual work
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Absolute motion analysis of pulley-spring system
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Lagrangian for a rod pivoting at the end of a clock hand
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Electric field external to Conducting Hollow Sphere with charge inside
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Lorentz force and induced electric field
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6
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Please explain this suggested solution for the field inside a charged hollow sphere
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Deriving a formula for KE (rolling + projection)
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Simple Static 3-Particle Model
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I am confused about air density/drag
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Problem about non-inertial reference frame
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How to calculate the force exerted by the "tendon" on the "tibia" bone?
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Range of an object launched on a downward hill
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Resistance of three-dimensional objects
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How to understand typo in MIT OCW chapter on Poynting vector?
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What does having 3d symmetry 2d symmetry and 1d symmetry mean?
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Spaceship length contraction problem
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Measuring Acceleration on a Bike using Phyphox
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How does an eddy current brake work exactly?
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what the relation between the amplitude magnitude and mass at resonance?
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Ion moving through electric potential difference and magnetic field
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Direction of travel of a plane wave given direction of electric field
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How is centripetal force involved here? (charged mass sliding down a conducting hemisphere)
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