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.
Optimizing strength to weight in balsa wood deck arch truss bridge
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Displacement amplitude of the faintest sound detectable by a human ear
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28
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Designing a speed bump given the maximum vertical wheel acceleration
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How do you Calculate Ampacity of a Conductor Geometry?
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A little annoying doubt -- Initial vertical speed of a jumping flea
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893
Calculate the Acceleration of this Car
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Two ropes pulling on a cylinder that is translating and rotating on a plane
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1K
Optical path difference between two reflected rays
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842
Why is the Celsius symbol not placed on the Kelvin unit?
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Comparing weights of balloons
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projectile motion problem with no initial velocity given
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3
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849
Calculate the Capacitance given the Charge and Potential Difference
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766
How to solve this problem in sinusoidal motion? (Satellite orbiting the Earth)
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777
Kinematics in multiple frames
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1K
Clarify definition of measurement
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795
Direction of oscillations of a polarised light wave
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1K
Find the height of a lamp based on the velocities of projectiles
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Velocity of a water jet exiting a water tank drain tube
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979
Electric Field Flux Question
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4
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890
Static equilibrium | Uniform sphere on incline | Determining friction
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2
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2K
Energy Changes in Capacitor After Disconnecting from Battery
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4
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2K
Entropy of a sealed room with an open-door refrigerator
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1K
Diffraction pattern from a grating
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3
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990
Question About Induced Currents in Three Different Coils
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10
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929
Is this question solvable by resolution of forces?
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1K
Need my mind refreshed on geometry
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9
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893
Kinematics problem involving multiple frames
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6
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874
Why do water streams get thinner as they fall?
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6
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3K
Differential Equation of a Pendulum
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2K
Time taken to slide down a circular path (with friction)
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2
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2K
Block sliding on vertical track with friction (Solved problem)
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4
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3K
Which of these rods are in equilibrium?
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2
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4K
Uncertainties For Wave Packets
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4
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1K
Separation of variables: Wave equation governing a string with fixed ends
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8
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1K
Interpretation of Negative Time in Minkowski Diagram
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1
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882
Order of events in a train traveling at v = 0.76c
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28
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2K
Physics Exam Preparation: General question about auxiliary quantity and linearization of a function in physics
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27
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1K
Velocity vectors; arrow length
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3
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991
Electrical Circuits - Parallel vs. Series
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14
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1K
Frequency of pendulum in the presence of electric field
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16
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1K
Electrostatic force on a test charge by uniformly charged annular disc
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1
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818
Energy stores and transfer on a rollercoaster
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1K
Truck accelerating down a ramp
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1K
Question about Momentum and torque
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10
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1K
Spring scale tension
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15
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1K
Torque acting on dipole
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1K
Leakage of Air in a Spacecraft
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Simulation of Elastic Collisions
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2
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Charge separation of O-H bond in water molecule?
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Resonant frequency of L - R||C circuit
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21
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1K
Which one is a correct statement about oscillation?
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24
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Why doesn’t my electric motor work?
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3
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736
Scientific inference skill
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Find speed of CoM after collision between ball and "square structure"
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How to make a motor for an assignment
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6
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860
Doubts on Diodes: Circuit Solving
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1K
Dimension Analysis -Turkey Cooking
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Finding oscillation of SHM of this rod, mass and spring
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981
Upside Down Paper-Glass Water Experiment
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How to read spacetime (Minkowski) diagram for proper length
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Velocity required to escape the solar system
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How do you calculate the margin of error in Physics?
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Simple harmonic motion question
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Gauss' Law for Non-Uniform electric fields
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999
If closed integral of E.dS is zero over a surface, then...?
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Gauss' law: Cause and effect relationship on the flux
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No Electric Charges if No Electric Field in Region
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Least Square Method to fit a line to a set of datapoints
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How to Calculate Center of Pressure (hf) for a Tank?
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Maximum electric field from a blob
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Maximum tension in thread connecting loads
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1K
What frequency will the bat hear?
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Work done by gravity on a hanging chain?
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Tension in a supporting thread after a second supporting thread is cut
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1K
Entropy Change Confusion
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7
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Hot air balloon question with bouyancy
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1K
Pulley Problem on an Inclined Surface Using Energy Methods
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1K
What is the tension in a charged ring?
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Pseudo Forces on a Mass in a Groove on a Rotating Disc
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Vertical Wall approaching Man - Impulse and Momentum Conservation
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How to calculate the moment of inertia of a rectangular cuboid?
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Potential energy of an electrostatic system in equilibrium
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Gauss' Law: Conductor, Insulator, Electric Field
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Ambiguous question on momentum and how it works...
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Find the work done by a spring using potential energy considerations
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4
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845
Relationship between pressure and temperature for liquids
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Archived Displacement and Momentum, particle in cathode ray tube with variables
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IBDP Extended Essay Ideas -- Help please
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Calculating Oscillation Period and Spring Energy in a Three-Mass System
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Electric Field of a Toroid carrying a changing current I = kt on axis
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Pulley system problem: 6 Pulleys and 1 Mass
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Signs in torque - different analyses using different sign notations?
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Why is the slope steeper in the given diagram?
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Are the 2nd and 3rd problems in this video correctly solved? (charged dipole and organ pipe problems)
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Mirror placed horizontally between two half convex lenses
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Billiard Ball, Conservation of Angular Momentum, Force below CM point
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Two vertical bars are connected at the bottom via resistance......
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What average power does the boy need to produce?
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Projectile motion of two balls off a cliff
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Focussing a collimated beam using a diffraction grating
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816