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.
Stretched spring attached to the center of a pure rolling disk
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What is taken as datum level for the following absolute potentials?
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2
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592
Applying Force on a Cylinder at an Angle
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8
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868
Free Body Diagram of Mass-Spring System
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5
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1K
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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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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2K
Homer Simpson spinning inside an hourglass
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4
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630
Resultant force on a parachutist
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11
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963
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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800
Length Contraction Problem for a Rod in a Spaceship
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4
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618
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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759
Theory of relativity -- Car and Garage Paradox
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13
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904
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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999
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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1K
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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944
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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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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662
Maxwell disc linked to bar unwinds but stays at same height by raising bar
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2
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699
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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2K
Ruler measurements and knowing how many decimal places to include
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9
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2K
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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594
B-field from a current in a wire above a conducting surface
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1
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597
Determining impulse given stopping distance and change in velocity
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6
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743
Special Relativity: spaceships heading toward each other
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7
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785
Quantum Mechanics - Time dependent solution - x's and t's not mixed up
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2
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755
Torques acting on a cylinder, with friction
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1
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575
Block connected to 2 real pulleys
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18
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849
Manned spacecraft to Tau problem
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5
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606
Events occuring in 4D spacetime
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1
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544
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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718
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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1K
Two masses connected by Pulley - Lagrangian problem
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6
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976
Trying to Calculate Initial Velocity and Final Velocity
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2
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753
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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1K
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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786
Can a Falling Mass Generate 12V Using an Optimal Magnet and Coil?
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9
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792
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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781
Find temperature of a U-shaped Tube
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9
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815
How far do acorns drift in the wind?
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9
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654
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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980
Relationship between linear velocity and angular velocity
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7
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974
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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61
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General question about the definition of moment of force (Torque)
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7
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848
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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1K
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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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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650
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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728
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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724
LASER Applications help please
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4
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732
Which movement has the greatest net work done?
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3
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637
Calculate the area of this pond with functions given for the perimeter
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2
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822
Why are the electrostatic field lines normal to a charged conductor?
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10
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2K
Electric field of a sphere and a shell
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16
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950
Rigid body dynamics: A rod with two masses rotates down from a horizontal starting position
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21
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1K
Equivalent Resistance of Cube of Resistors: A to B
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5
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3K
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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894
Is My Answer Correct for Calculating Average Current on a Ring?
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8
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867
Correct Setup for Finite Difference to Calculate Quantum Tunneling
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2
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980
Confused about interefence patterns
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16
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1K
Magnetization of a paramagnetic sphere
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11
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2K
Help with a Physics car project please
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2
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707
Solving projectile motion problems using Lagrangian mechanics
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9
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1K
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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552
Force between charged particle and conducting cylinder
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10
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1K
Tension in a deformed cylindrical bag on a surface
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18
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2K
Finding the shape of a hanging rope
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3
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767
Two launches ferrying between two landing stations along a river
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23
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Calculate how fast the car was travelling when brakes were applied
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1
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738
Contact Mechanics: Deformation of a ball on a surface
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3
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