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.
How Do Mass and Weight Differ?
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Equivalence of Euler-Lagrange equations and Cardinal Equations for a rigid planar system
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4
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Rotating simple harmonic oscillator
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11
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Deriving speed equations | Elastic collision
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839
Force analysis of a spring-bob system
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2
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747
Block on top of moving slab, with a rough surface - When does v_b=v_s?
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27
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Impulse and perfectly inelastic collision between 2 points
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4
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919
Conservation of energy of a bow and arrow
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3
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905
Stretched spring attached to the center of a pure rolling disk
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11
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What is taken as datum level for the following absolute potentials?
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670
Applying Force on a Cylinder at an Angle
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8
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955
Free Body Diagram of Mass-Spring System
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5
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Conservation of Mechanical Energy - Which Equation To Use?
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9
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Closest distance of approach between 2 charged particles
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5
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System of two wheels of different sizes with an axle through their centers
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3
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Change in Entropy When Mixing Water at Different Temperatures
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5
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Question About Momentum: Ball Rolling up a Curved Ramp
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12
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Homer Simpson spinning inside an hourglass
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4
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697
Resultant force on a parachutist
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11
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A moving boat with a flag on its mast
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15
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Calculating work done by a gas
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2
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891
Length Contraction Problem for a Rod in a Spaceship
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4
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668
Perfectly inelastic collision between Projectile and a hinged disk
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26
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Moving charge deflected by a loop of wire
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1
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848
Theory of relativity -- Car and Garage Paradox
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13
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986
Maximum allowable value of a force
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5
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Conservation of Momentum Problem - Mechanical and Kinetic Energies
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2
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Dynamics of a Block on top of a slab with friction between them
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2
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33
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2K
Find the Period of Oscillation for a Mass Falling Through a Tunnel Through the Earth
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7
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Textbook 'The Physics of Waves': Derive Complex Solution Form for SHM
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6
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Is it friction or tension acting on the person hanging on a rope?
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4
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Could someone help me study this cyclic process of an ideal gas?
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2
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35
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Spherical ball rolling back and forth in a bowl
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24
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2K
Determine the force with which the magnetic field of a coil acts on an infinitesimal cube of iron
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6
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1K
Speed of charged balls after collision
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13
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Electric Field of a quarter ring
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3
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715
Maxwell disc linked to bar unwinds but stays at same height by raising bar
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2
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792
Gauss' Law with a Insulating Shell
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4
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21K
Induced EMF in a rotating ring
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14
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1K
For what values of total energy is the resulting motion periodic?
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25
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Why are moments not included in free body diagrams?
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2
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31
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Ruler measurements and knowing how many decimal places to include
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9
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Energy analysis of this system (curved ramp up and a spring)
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29
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Dispersion of rightward steps in 1-D random walks
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3
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684
B-field from a current in a wire above a conducting surface
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1
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655
Determining impulse given stopping distance and change in velocity
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6
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787
Special Relativity: spaceships heading toward each other
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7
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874
Quantum Mechanics - Time dependent solution - x's and t's not mixed up
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2
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792
Torques acting on a cylinder, with friction
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1
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603
Block connected to 2 real pulleys
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18
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935
Manned spacecraft to Tau problem
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5
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664
Events occuring in 4D spacetime
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1
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A rod sliding/falling down on a frictionless horizontal plane
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8
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Why is a 1d conservative force approximately linearly related to position?
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3
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Finding magnetic field using Ampere's Circuital Law
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5
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Is My Understanding of Accelerations in Irodov 1.258 Correct?
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14
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Two masses connected by Pulley - Lagrangian problem
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6
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Trying to Calculate Initial Velocity and Final Velocity
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2
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822
Colour depends on wavelength or frequency?
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22
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Magnetic field outside a semi-infinite solenoid
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12
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An ambigious optical system with ambigious solutions [JEE Adv - 20`16]
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Lagrangian of a block on an inclined plane
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16
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Failed rocket problem (momentum conservation, Kleppner 4-4)
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3
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838
Can a Falling Mass Generate 12V Using an Optimal Magnet and Coil?
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9
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861
Double pendulum Lagrangian using small angle approximation formula
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Euler- Lagrange equation proof
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2
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849
Find temperature of a U-shaped Tube
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9
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How far do acorns drift in the wind?
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9
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Rpm and power for this electric motor, gearbox and pulley system
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19
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Normalising the wavefunction - two answers
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12
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Relationship between linear velocity and angular velocity
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7
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Is the Solution for Rotation of Spherical Mirrors Incorrect?
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16
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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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7
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What's the pressure long before the fluid exits a pipe?
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13
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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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12
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Induced charge on a conducting sphere sliced by a plane
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2
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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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13
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Question about the current components inside the Corbino disk
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11
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Pressure just before the exit hole in a draining tank
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7
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Find the coefficient of friction between block and surface
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4
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692
Block and wedge problem -- Where am I going wrong?
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7
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Potential Energy Problem: Pulling a Chain up onto a Table
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3
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What is the maximum length of the spring?
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4
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Need some confirmation regarding induced currents
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1
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794
LASER Applications help please
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4
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797
Which movement has the greatest net work done?
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3
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728
Calculate the area of this pond with functions given for the perimeter
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2
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894
Why are the electrostatic field lines normal to a charged conductor?
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10
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Electric field of a sphere and a shell
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16
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Rigid body dynamics: A rod with two masses rotates down from a horizontal starting position
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21
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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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7
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Net force between two conducting strips
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6
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975
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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16
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Magnetization of a paramagnetic sphere
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11
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Help with a Physics car project please
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2
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771
Solving projectile motion problems using Lagrangian mechanics
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9
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