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.
A Braking System with Spikes for Cars
  • Alateo
  • · Replies 4 ·
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4
Torque on a Circular Current Loop under a Misaligned Magnetic Field
  • domephilis
  • · Replies 1 ·
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1
Rod with Current on Rails in Magnetic Field
  • domephilis
  • · Replies 12 ·
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12
A problem in applying Kirchhoff's Voltage Law
  • Patrick Herp
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1
Body attached to a block by a spring, shaped like an inclined plane
  • kekpillangok
  • · Replies 1 ·
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1
Ball revolving around a massive disc and a cube placed at centre
  • someone_2156
  • · Replies 1 ·
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1
A cylinder rotating on a plane with friction and then moving across a frictionless plane to a collision
  • Jason Ko
  • · Replies 1 ·
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1
Finding the intermediate height of a ball in terms of its maximum height
  • SelzerRS
  • · Replies 3 ·
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3
Time taken for a planet to collide with the Sun
  • someone_2156
  • · Replies 10 ·
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10
Why is there no current flow in the middle branch? (Circuits problem)
  • phantomvommand
  • · Replies 8 ·
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8
Temperature dependence of resistance
  • tellmesomething
  • · Replies 6 ·
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6
Find the density of surface charges at the boundary of two conductors with different resistivities
  • tellmesomething
  • · Replies 6 ·
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6
Trying to tie two runners of different speeds over a race
  • josephn
  • · Replies 30 ·
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Can Energy Conservation Solve the Angular Velocity Problem?
  • nafisanazlee
  • · Replies 6 ·
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6
How do we represent a triangle wave for input voltage in this circuit?
  • zenterix
  • · Replies 3 ·
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3
Why is Radial Acceleration Ignored for a Rotating Board?
  • momo1111
  • · Replies 9 ·
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9
Concept of different accelerations on rotations of rigid bodies
  • cyap
  • · Replies 10 ·
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10
Relativistic Decay and Separation Between Moving Nuclei A and B
  • alex_ts
  • · Replies 1 ·
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1
Looking for observed rotation periods of various Foucault pendulums at different latitudes
  • RandomDude1234
  • · Replies 6 ·
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6
Textbook 'The Physics of Waves': Varying Force Amplitude
  • brettng
  • · Replies 3 ·
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3
Expression for magnitude of the constant friction force
  • Racoon5
  • · Replies 7 ·
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7
Energy conservation equation to find equation for final velocity
  • Racoon5
  • · Replies 4 ·
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4
How Many Eggs to Turn a 40lb Flywheel in a Vacuum?
  • gibsnax
  • · Replies 10 ·
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10
Effect of rim width on a frisbee's stability and range
  • Anjish
  • · Replies 8 ·
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8
Rocket + Connected Body Dynamics problem
  • Mohammad Ishmas
  • · Replies 47 ·
2
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47
Quantum Mechanics Boundary conditions
  • MaxJ
  • · Replies 3 ·
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3
Uncertainty in particle position
  • MaxJ
  • · Replies 3 ·
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3
Reflection probability in Quantum Mechanics
  • MaxJ
  • · Replies 2 ·
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2
Why is the direction of kinetic/static friction up a ramp?
  • Heisenberg7
  • · Replies 7 ·
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7
Heated gas pushing a mercury column out of a cylinder
  • highschoboy004
  • · Replies 10 ·
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10
Temperature of two subsystems at equilibrium
  • f3sicA_A
  • · Replies 7 ·
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7
Doppler Effect Question: Flying Bat Echolocating a Mosquito
  • pot
  • · Replies 12 ·
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12
Final momentum of box with reflective interior hit by ideal laser
  • dark_matter_is_neat
  • · Replies 4 ·
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4
Explain why applying different forces to objects of different masses result in different accelerations
  • helloword365
  • · Replies 9 ·
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9
Incandescent Bulb - suitable approximation for voltage-current curve
  • RodionGork
  • · Replies 2 ·
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2
Diophantine equations and physics
  • Weavyside
  • · Replies 1 ·
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1
Underground cables faulty point detected
  • tellmesomething
  • · Replies 24 ·
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24
Motion of an electron inside the cavity of a charged sphere
  • Zayan
  • · Replies 5 ·
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5
How to solve this driven RLC circuit?
  • zenterix
  • · Replies 13 ·
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13
Electrostatics and current problem with 3 metallic balls
  • tellmesomething
  • · Replies 29 ·
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29
How to set up this problem with driven torsional oscillator?
  • zenterix
  • · Replies 5 ·
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5
Find the mass of odium for both solid and liquid state
  • hraghav
  • · Replies 9 ·
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Find the final temperature of the combined honorite and odium?
  • hraghav
  • · Replies 5 ·
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5
Difference between maximizing amplitude by choosing omega_0 given omega_d versus choosing omega_d given omega_0.
  • zenterix
  • · Replies 4 ·
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4
Mechanisms Involved When Charging a Battery
  • tellmesomething
  • · Replies 10 ·
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10
Find final temp of 2 substances once they have reached equilibrium
  • hraghav
  • · Replies 6 ·
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6
What is the meaning of the intercept of a particular solution to damped oscillator?
  • zenterix
  • · Replies 7 ·
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7
Magnetic Field of an infinite current-carrying wire at a point
  • BuggyWungos
  • · Replies 5 ·
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5
To what extent does this system behave as a pendulum?
  • l4teLearner
  • · Replies 1 ·
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1
Force on a block placed on a rotating disc, calculated in different reference frames
  • Aurelius120
  • · Replies 25 ·
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How does a simple circuit work?
  • tellmesomething
  • · Replies 12 ·
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12
Why is current constant through a resistor?
  • BuggyWungos
  • · Replies 11 ·
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11
Did I Misuse the Parallel Axis Theorem for Polar Moment of Inertia?
  • Usaid3112
  • · Replies 2 ·
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2
Why is the current in a conductor equal to zero when not connected to a circuit?
  • tellmesomething
  • · Replies 13 ·
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13
Why does electric potential energy increase if you move against the field?
  • BuggyWungos
  • · Replies 6 ·
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6
Determining angular velocity of weight attached to a cord and cylinder
  • I_Try_Math
  • · Replies 23 ·
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23
Electromagnetic force on a positively charged particle
  • Sat-P
  • · Replies 3 ·
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3
Why would this be accelerating positively?
  • helloword365
  • · Replies 6 ·
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6
Calculating the Relative COG of Two Masses
  • slobberingant
  • · Replies 20 ·
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Pistons placed on top of communicating vessels
  • highschoboy004
  • · Replies 20 ·
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20
Is Linear Momentum Conserved in This Case? (sliding box hits a floor tile)
  • Heisenberg7
  • · Replies 2 ·
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2
Ray optics: velocity of image reflected off a moving mirror
  • Zayan
  • · Replies 5 ·
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5
Analyzing torque of an automobile engine
  • I_Try_Math
  • · Replies 6 ·
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6
Confusion over acceleration of gravity as positive/negative
  • helloworld2941
  • · Replies 10 ·
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10
A cylinder has two sides containing gas and water separately
  • highschoboy004
  • · Replies 4 ·
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4
Finding the angular velocity of a pendulum
  • I_Try_Math
  • · Replies 3 ·
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3
Number of bright fringes given by diffraction grating on a screen
  • lorenz0
  • · Replies 6 ·
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6
How Many Lines Per Millimeter Does the Diffraction Grating Have?
  • Ericv_91
  • · Replies 5 ·
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5
What’s gone wrong with my derivation of the Lorentz Factor?
  • ryan2
  • · Replies 7 ·
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7
Find ratio of brightness & the distance the 6th dark fringe is from central fringe
  • hraghav
  • · Replies 5 ·
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5
Coulomb's law to find electric field for charge density function
  • Su6had1p
  • · Replies 11 ·
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11
Find smallest distance x from y-axis for both constructive & destructive interference to occur
  • hraghav
  • · Replies 5 ·
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5
Find smallest value of y for constructive interference
  • hraghav
  • · Replies 3 ·
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3
EMF induced in moving rod in B-field, why is "L" length of wire frame?
  • phantomvommand
  • · Replies 4 ·
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4
Why is vertical displacement second order in horizontal displacement for coupled oscillator?
  • zenterix
  • · Replies 8 ·
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8
Induced EMF due to a moving magnet
  • phantomvommand
  • · Replies 7 ·
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7
How to Apply Derivatives in Physics Problems?
  • Heisenberg7
  • · Replies 9 ·
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9
How to calculate pressure when two forces are exerted
  • physics565
  • · Replies 23 ·
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23
Equivalent resistance of this 6-sided circuit
  • Sat-P
  • · Replies 59 ·
2
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Please help with this suggested solution involving electrostatic press
  • tellmesomething
  • · Replies 14 ·
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14
Find the change in the time required, if acceleration increases by the differential amount 'da'
  • Heisenberg7
  • · Replies 7 ·
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7
Solving for potential using surface charge density of a sphere
  • BuggyWungos
  • · Replies 3 ·
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3
Tension in a string which connects 3 pulleys
  • danut
  • · Replies 12 ·
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12
Particle in one dimension wave function from Quantum Mechanics
  • BlondEgg
  • · Replies 3 ·
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3
Minimal distance between two planes moving perpendicularly
  • NikolasLund
  • · Replies 6 ·
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6
Analyzing acceleration of block on a ramp connected to a pulley
  • I_Try_Math
  • · Replies 15 ·
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15
Friction problem of a block sandwiched between 2 surfaces
  • vcl0124
  • · Replies 6 ·
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6
How friction acts on a block moving down a slope moving side to side
  • QuantumOscillatorIII
  • · Replies 2 ·
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2
How to find the equivalent resistance of this infinite circuit?
  • zenterix
  • · Replies 10 ·
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10
The div in cartesian coordinates
  • kirito
  • · Replies 2 ·
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2
Find the location of the diver's reflection in the convex mirror
  • hraghav
  • · Replies 19 ·
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19
Find the electric field between 2 finite discs
  • kirito
  • · Replies 16 ·
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16
Find the location and length of the final image
  • hraghav
  • · Replies 2 ·
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2
Man pulling a boat along the water with a rope (from above on a steep bank)
  • brotherbobby
  • · Replies 31 ·
2
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31
Material Selection - Hooke's law [not]
  • nik_2507
  • · Replies 14 ·
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14
Tension Force Problem (applying Work-Kinetic Energy Theorem)
  • Heisenberg7
  • · Replies 16 ·
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16
Falling mass, additionally accelerated by a rope
  • greypilgrim
  • · Replies 18 ·
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18
Calculating torque on a pendulum
  • I_Try_Math
  • · Replies 2 ·
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2
Electric field lines outside a neutral conducting spherical shell
  • tellmesomething
  • · Replies 12 ·
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12
How to calculate quality factor for RLC circuit?
  • zenterix
  • · Replies 6 ·
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6