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 distance will be covered before coming to stop?
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Motor rotating at normal speed and then prevented from rotating
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2
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600
Force between charged particle and conducting cylinder
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10
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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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843
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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818
Contact Mechanics: Deformation of a ball on a surface
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3
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1K
How to calculate the velocity of water streaming into the boat?
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19
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1K
Difficulty Understanding 'Drag Crisis' (transitionary period from laminar to turbulent flow)
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1
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1K
Issues with SLS Model for Rubber and Foam Compression Tests
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5
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887
Stress on a spaghetti rod balanced from its middle
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6
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1K
How to calculate the degrees of freedom of a simple multi-body system?
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5
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961
What Force must be exerted on the trolley for constant speed?
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1
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503
Two objects joined by a rectilinear cable rotating
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8
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1K
Oscillation of system of three charges
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8
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1K
Bees and Trains: A distance problem
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19
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2K
Extension of spring in a system with two pistons
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16
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895
Classical Mechanics: Rocket Propulsion Calculation
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10
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1K
Missing negative sign in my textbook's answer?
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1
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707
Spaceship, Earth and proton problem in special relativity
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12
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999
Quantum - Postulate of getting specific momentum p = |A_p|^2
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7
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923
Effect of temperature on surface tension
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2
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1K
Need maximum weight on an extension machine
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2
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819
Finding a formula for displacement of a mass on a spring using v.
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2
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823
Correct Derivation of the Adiabatic Condition? (PV Diagram)
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4
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1K
An "x" from nowhere, mistake by textbook? (induced voltages)
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2
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905
Shape of equipotential surface in 3d
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5
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922
A problem in this photoelectric effect experiment
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8
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1K
Problem in understanding angular momentum of a rigid body
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10
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2K
Shape of Slinky being twirled in 0 gravity
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4
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628
Two Trains and a Bee: Distance Question
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3
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890
A falling resistive disk in uniform magnetic field
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17
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1K
How can I maximise the exit velocity of an object catapulted up?
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4
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792
Which block reaches the wall faster?
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2
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1K
Is this a mistake in my textbook's answer about induced voltage question?
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1
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752
Horizontal component of the Coriolis force
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2
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849
Flux linking (and de-linking?)
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6
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1K
Force on a rotating wheel/disc
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25
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2K
Magnus Effect Equations and Mechanics
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12
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1K
Forces involved in principle of virtual work
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2
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842
Absolute motion analysis of pulley-spring system
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10
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1K
Lagrangian for a rod pivoting at the end of a clock hand
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5
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823
Electric field external to Conducting Hollow Sphere with charge inside
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23
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4K
Lorentz force and induced electric field
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6
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1K
Please explain this suggested solution for the field inside a charged hollow sphere
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17
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1K
Deriving a formula for KE (rolling + projection)
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2
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729
Simple Static 3-Particle Model
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2
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555
I am confused about air density/drag
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12
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1K
Problem about non-inertial reference frame
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8
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1K
How to calculate the force exerted by the "tendon" on the "tibia" bone?
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4
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1K
Range of an object launched on a downward hill
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12
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1K
Resistance of three-dimensional objects
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10
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How to understand typo in MIT OCW chapter on Poynting vector?
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4
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870
What does having 3d symmetry 2d symmetry and 1d symmetry mean?
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2K
Spaceship length contraction problem
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4
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566
Measuring Acceleration on a Bike using Phyphox
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2
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33
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2K
How does an eddy current brake work exactly?
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2
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2K
what the relation between the amplitude magnitude and mass at resonance?
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5
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Ion moving through electric potential difference and magnetic field
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8
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2K
Direction of travel of a plane wave given direction of electric field
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8
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How is centripetal force involved here? (charged mass sliding down a conducting hemisphere)
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2
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Mathematical representation of a pulse on a rope
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9
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731
Is This a Series or Parallel Circuit?
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13
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1K
Planet moving in elliptical orbit around a star
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13
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971
Why can we add impedances in series?
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4
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2K
How to understand the direction of tension in a charged closed ring?
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11
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862
Internal energy of a gas and kinetic energy, "typical velocity"
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5
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926
Damped harmonic oscillation
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3
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4K
Question on mirror and lens combinations
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2
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3K
Find the direction and the magnitude of Frictional force
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3
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901
Shortest distance along the shore and into the lake
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6
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1K
Magnitude of magnetic field at different points near a capacitor.
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6
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How to find voltage across capacitor in RLC circuit?
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3
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Vertical circular motion
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8
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2K
Can Geiger Counter Ticks be converted into particle/wave counts?
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12
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2K
Kinematics: Acceleration of a figure skater changing direction
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16
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1K
Find the electric field at a point in 3 dimensional space
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2
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The electric potential inside a conducting sphere with charge Q
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11
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2K
X and Y coordinates of an oscillating object on a spring.
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3
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750
Simultaneous events separated by distance and time
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5
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721
Finding speed of spaceship traveling to star ##a## light years away
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8
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828
Stationary observer meaning in relativity problem
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14
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744
Particle moving at speed ##bc## relative to laboratory frame
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20
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896
Why Doesn't Time Dilation Affect Pendulum Observations on a Moving Train?
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8
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857
Two cyclists ride between a pair of towns with and against the wind
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17
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1K
Universal gravitation’s problem -- Balancing gravitational forces from 2 masses
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3
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591
Prove that the field due to a circular arc is same as its bounded tangent at the centre of curvature
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23
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Experimenting whether the diameter of a pot affects boiling time for water
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15
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3K
How to obtain amplitude of current in parallel RLC circuit?
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3
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862
Uniform Motion in 2D - A man chasing a bus
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20
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Understanding the generic nature of linearity in Physics
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2
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1K
Ap physics 1 velocity center of mass question
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4
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760
Self-inductance of LC circuit given rate of capacitor discharge.
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6
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Formula for the average EMF of generator
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6
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968
Calculation of current in driven series RLC circuit
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8
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2K
Magnetic energy density, self-inductance of coaxial cylindrical shells
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10
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2K
Test question: What is true for a mechanical impact?
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7
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1K
Find work given two conservative forces and a nonconservative force
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9
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954
Two candles making shadows of one another on opposite walls
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3
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