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.
Circular motion and moment of inertia - circle loop
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2K
Pressure question: Weight of a car calculated from tyre contact patch area
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3
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1K
Ionic thruster high school science project
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2
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945
Rolling without Slipping Demo
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8
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1K
RCL series circuit analysis: Damping Constant
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1
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889
Electric field of a charged disc with a small circle cut out of it
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9
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1K
Block tied to a fixed string on an accelerating wedge
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2
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37
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3K
Use of imaginary charge vs Gauss' law
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12
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1K
Relation between the velocity vector and the acceleration vector of an object
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1
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875
Issue deriving the third law of thermodynamics
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11
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1K
First Law of Thermo: Audience body heat warming a concert hall
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25
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2K
Rotational Dynamics problem with instantaneous frame of reference
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6
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892
Distribution of Energy when work is done on a system of 2 masses connected by a spring
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17
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2K
What Does -∂V/∂x Represent in Newton's Law?
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2
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2K
How to approach this question using SUVAT equations?
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8
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952
Confused about kinematic equations
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20
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3K
What is the relationship between tire size and pressure changes?
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13
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1K
Moment of Inertia of Solid Sphere - Proof
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3
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6K
Reading of Ammeter for this circuit with Voltage Controlled Resistors
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9
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1K
Relation between Friction, Velocity, and Acceleration
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16
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1K
Is this statement acceptable? (time derivative of a rotating vector)
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4
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848
Entropy Change For Van Der Waals Gas
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5
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698
Maximum Power dissipated at load resistor
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3
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1K
Poiseuille law and friction force help
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5
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750
Reversible, adiabatic expansion - Entropy Change
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5
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948
Linear momentum but quadratic kinetic energy?
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4
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654
Are there two downward forces acting on the pivot of the rotating rod?
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3
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67
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4K
Thermodynamics: Violating Clausius => Violating Kelvin
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10
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991
The motion of a skateboarder along and above a ramp
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2
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760
Deriving the particle's motion using numerical integration
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5
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904
Circular motion, coin on a rotating disk
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2
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944
Angular velocity- A toy train rolls around a horizontal track
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8
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1K
Energy stored in the steady state circuit
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7
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966
Solving Kinematics Problem: V_o & Max Height
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7
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3K
Additivity of thermodynamic potentials?
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1
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584
Two Forces Acting Simultaneously
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6
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959
Electric field of a finite linear distribution of charge
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18
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1K
Conversion factor when converting from SI to natural units
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1
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1K
How do I calculate forces in a truss cross section?
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2
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818
Clausius' Theorem and Entropy
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8
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986
Circular argument? Justification of equipotential points
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16
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1K
Is My Calculation of Work Along a Defined Curve Correct?
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4
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831
Thermodynamics of a Heat Engine - (First/Second Law)
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2
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727
Finding the distance of a peg so that a pendulum can circle around it
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2
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1K
Energy of springs connected in series and parallel
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13
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1K
The specific work done on an ideal gas during an adiabatic process in a piston-cylinder system
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13
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2K
Relative electrical energy consumption for different light bulb color temperatures
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3
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805
Frequency of Reflected light in special relativity
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1
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656
Confusion about work done by a gas - Thermodynamics
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15
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2K
Thermal exchange between warm object and ideal gas
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2
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992
Thermodynamics: Two gases in a container
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1
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810
Show that the radius of the exoplanet is about 1/2 of Earth’s radius
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2
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995
Total Energy vs Average Energy (Thermo)
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11
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1K
Electric flux from line charge through plane strip
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7
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6K
Investigation into electric guitar pickups
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4
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3K
Electric field created by point charges
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6
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1K
Confusion about applying Faraday's law to a circuit
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3
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What's the energy stored in a parallel plate capacitor?
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14
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Mass Pulley and torque -- Confusion in this Atwood machine problem
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11
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1K
Derive Gravitational Force and Field between two identical rods
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1
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578
A particle slides down a non-fixed hemisphere
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3
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Two spring-coupled masses in an electric field (one of the masses is charged)
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Find the equivalent resistance of this circuit
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2
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5K
How Do I Draw a Decay Scheme in Radiochemistry?
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1
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942
Determine the type of measurement by classification
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2
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659
Rope tension problem: Mass hanging from a rope tied at an angle
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21
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1K
Potential in spherical shells
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2
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935
Internal Resistance Affect the Balancing Length in a Potentiometer?
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12
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Robot starts to overturn when reaching to pick up a load
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2
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715
Distance rolled of sphere vs cylinder with same m, r, and v
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5
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1K
Determine energy required to stop rolling mass
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10
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878
Required force for sphere start rolling
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2
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892
Conservation of String Exercise
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5
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865
Reflection and Transmission of String Waves
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8
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2K
Tension in a rope hanging between 2 trees
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24
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2K
How do I calculate the Tension in a rope going over a smooth pulley?
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19
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Liquid rocket engine excercise
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1
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1K
Connecting a number of EMF sources in a circle to form a circuit
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9
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1K
Friction force on a ball falling through a body of water
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9
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1K
Is the Trigonometric Analysis of Conveyor Belt Forces Correct?
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6
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794
Gradient and Divergence in spherical coordinates
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3
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2K
Making a vehicle go straight on carpet
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8
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881
A Braking System with Spikes for Cars
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4
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901
Torque on a Circular Current Loop under a Misaligned Magnetic Field
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1
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1K
Rod with Current on Rails in Magnetic Field
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12
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2K
A problem in applying Kirchhoff's Voltage Law
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1
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1K
Body attached to a block by a spring, shaped like an inclined plane
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1
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1K
Ball revolving around a massive disc and a cube placed at centre
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1
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977
A cylinder rotating on a plane with friction and then moving across a frictionless plane to a collision
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1
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1K
Finding the intermediate height of a ball in terms of its maximum height
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3
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988
Time taken for a planet to collide with the Sun
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10
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1K
Why is there no current flow in the middle branch? (Circuits problem)
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8
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Temperature dependence of resistance
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6
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1K
Find the density of surface charges at the boundary of two conductors with different resistivities
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6
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Trying to tie two runners of different speeds over a race
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2
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30
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2K
Can Energy Conservation Solve the Angular Velocity Problem?
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6
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997
How do we represent a triangle wave for input voltage in this circuit?
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3
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931
Why is Radial Acceleration Ignored for a Rotating Board?
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9
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Concept of different accelerations on rotations of rigid bodies
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10
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1K
Relativistic Decay and Separation Between Moving Nuclei A and B
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1
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724