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.
What is meant by small oscillations for this potential energy function?
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976
Initial velocity of bird landing on horizontal wire modeled as spring
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7
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1K
Circular motion of a Weightless rod
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18
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1K
Electric field of point along the central vertical axis of a triangle
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3
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1K
Proving Newton's 3rd law from conservation of momentum
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2
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917
Finding speed of two billiard balls in elastic collision
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9
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1K
Electromagnetism - Infinite plane of charge & Tension
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9
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952
Measurement of the Stefan-Boltzmann constant
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6
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787
Why is the superposition principle valid here?
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5
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962
Morin 3.7 -- Block sliding sideways on an inclined plane
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11
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1K
How Do Mass and Weight Differ?
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29
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2K
Equivalence of Euler-Lagrange equations and Cardinal Equations for a rigid planar system
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4
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1K
Rotating simple harmonic oscillator
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2K
Deriving speed equations | Elastic collision
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891
Force analysis of a spring-bob system
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2
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782
Block on top of moving slab, with a rough surface - When does v_b=v_s?
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1K
Impulse and perfectly inelastic collision between 2 points
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4
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948
Conservation of energy of a bow and arrow
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3
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988
Stretched spring attached to the center of a pure rolling disk
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11
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1K
What is taken as datum level for the following absolute potentials?
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2
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691
Applying Force on a Cylinder at an Angle
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8
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1K
Free Body Diagram of Mass-Spring System
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5
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2K
Conservation of Mechanical Energy - Which Equation To Use?
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9
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1K
Closest distance of approach between 2 charged particles
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5
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1K
System of two wheels of different sizes with an axle through their centers
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3
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4K
Change in Entropy When Mixing Water at Different Temperatures
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5
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1K
Question About Momentum: Ball Rolling up a Curved Ramp
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12
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2K
Homer Simpson spinning inside an hourglass
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4
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719
Resultant force on a parachutist
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11
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1K
A moving boat with a flag on its mast
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15
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1K
Calculating work done by a gas
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2
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918
Length Contraction Problem for a Rod in a Spaceship
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4
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693
Perfectly inelastic collision between Projectile and a hinged disk
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26
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1K
Moving charge deflected by a loop of wire
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1
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871
Theory of relativity -- Car and Garage Paradox
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13
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1K
Maximum allowable value of a force
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5
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1K
Conservation of Momentum Problem - Mechanical and Kinetic Energies
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2
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1K
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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1K
Textbook 'The Physics of Waves': Derive Complex Solution Form for SHM
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6
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1K
Is it friction or tension acting on the person hanging on a rope?
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4
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1K
Could someone help me study this cyclic process of an ideal gas?
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2
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2K
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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1K
Electric Field of a quarter ring
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3
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748
Maxwell disc linked to bar unwinds but stays at same height by raising bar
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2
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823
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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1K
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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3K
Energy analysis of this system (curved ramp up and a spring)
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29
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1K
Dispersion of rightward steps in 1-D random walks
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3
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715
B-field from a current in a wire above a conducting surface
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1
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673
Determining impulse given stopping distance and change in velocity
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6
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809
Special Relativity: spaceships heading toward each other
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7
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914
Quantum Mechanics - Time dependent solution - x's and t's not mixed up
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2
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808
Torques acting on a cylinder, with friction
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1
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626
Block connected to 2 real pulleys
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18
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965
Manned spacecraft to Tau problem
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5
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686
Events occuring in 4D spacetime
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1
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628
A rod sliding/falling down on a frictionless horizontal plane
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8
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1K
Why is a 1d conservative force approximately linearly related to position?
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3
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835
Finding magnetic field using Ampere's Circuital Law
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5
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1K
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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1K
Trying to Calculate Initial Velocity and Final Velocity
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2
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861
Colour depends on wavelength or frequency?
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22
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1K
Magnetic field outside a semi-infinite solenoid
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12
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2K
An ambigious optical system with ambigious solutions [JEE Adv - 20`16]
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19
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2K
Lagrangian of a block on an inclined plane
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16
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1K
Failed rocket problem (momentum conservation, Kleppner 4-4)
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3
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865
Can a Falling Mass Generate 12V Using an Optimal Magnet and Coil?
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9
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885
Double pendulum Lagrangian using small angle approximation formula
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1K
Euler- Lagrange equation proof
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2
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877
Find temperature of a U-shaped Tube
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9
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929
How far do acorns drift in the wind?
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9
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759
Rpm and power for this electric motor, gearbox and pulley system
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19
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1K
Normalising the wavefunction - two answers
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12
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1K
Relationship between linear velocity and angular velocity
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7
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1K
Is the Solution for Rotation of Spherical Mirrors Incorrect?
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16
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2K
How can I determine the instant the block overcomes static friction?
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3
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3K
General question about the definition of moment of force (Torque)
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7
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951
What's the pressure long before the fluid exits a pipe?
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13
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1K
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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1K
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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11
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1K
Pressure just before the exit hole in a draining tank
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7
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2K
Find the coefficient of friction between block and surface
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4
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718
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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3
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847
What is the maximum length of the spring?
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4
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889
Need some confirmation regarding induced currents
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1
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820
LASER Applications help please
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4
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825
Which movement has the greatest net work done?
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3
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750
Calculate the area of this pond with functions given for the perimeter
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2
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915
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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16
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1K