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 Does -∂V/∂x Represent in Newton's Law?
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How to approach this question using SUVAT equations?
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890
Confused about kinematic equations
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What is the relationship between tire size and pressure changes?
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Moment of Inertia of Solid Sphere - Proof
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Reading of Ammeter for this circuit with Voltage Controlled Resistors
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Relation between Friction, Velocity, and Acceleration
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Is this statement acceptable? (time derivative of a rotating vector)
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811
Entropy Change For Van Der Waals Gas
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Maximum Power dissipated at load resistor
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1K
Poiseuille law and friction force help
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713
Reversible, adiabatic expansion - Entropy Change
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885
Linear momentum but quadratic kinetic energy?
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623
Are there two downward forces acting on the pivot of the rotating rod?
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Thermodynamics: Violating Clausius => Violating Kelvin
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941
The motion of a skateboarder along and above a ramp
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726
Deriving the particle's motion using numerical integration
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868
Circular motion, coin on a rotating disk
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910
Angular velocity- A toy train rolls around a horizontal track
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1K
Energy stored in the steady state circuit
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7
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894
Solving Kinematics Problem: V_o & Max Height
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7
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2K
Additivity of thermodynamic potentials?
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561
Two Forces Acting Simultaneously
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6
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908
Electric field of a finite linear distribution of charge
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1K
Conversion factor when converting from SI to natural units
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1K
How do I calculate forces in a truss cross section?
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776
Clausius' Theorem and Entropy
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8
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935
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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800
Thermodynamics of a Heat Engine - (First/Second Law)
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698
Finding the distance of a peg so that a pendulum can circle around it
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1K
Energy of springs connected in series and parallel
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The specific work done on an ideal gas during an adiabatic process in a piston-cylinder system
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Relative electrical energy consumption for different light bulb color temperatures
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3
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763
Frequency of Reflected light in special relativity
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630
Confusion about work done by a gas - Thermodynamics
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2K
Thermal exchange between warm object and ideal gas
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2
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952
Thermodynamics: Two gases in a container
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1
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752
Show that the radius of the exoplanet is about 1/2 of Earth’s radius
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2
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948
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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1K
What's the energy stored in a parallel plate capacitor?
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2K
Mass Pulley and torque -- Confusion in this Atwood machine problem
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1K
Derive Gravitational Force and Field between two identical rods
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552
A particle slides down a non-fixed hemisphere
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3
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991
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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How Do I Draw a Decay Scheme in Radiochemistry?
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Determine the type of measurement by classification
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629
Rope tension problem: Mass hanging from a rope tied at an angle
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Potential in spherical shells
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Internal Resistance Affect the Balancing Length in a Potentiometer?
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Robot starts to overturn when reaching to pick up a load
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Distance rolled of sphere vs cylinder with same m, r, and v
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Determine energy required to stop rolling mass
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Required force for sphere start rolling
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862
Conservation of String Exercise
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Reflection and Transmission of String Waves
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Tension in a rope hanging between 2 trees
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1K
How do I calculate the Tension in a rope going over a smooth pulley?
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Liquid rocket engine excercise
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Connecting a number of EMF sources in a circle to form a circuit
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Friction force on a ball falling through a body of water
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1K
Is the Trigonometric Analysis of Conveyor Belt Forces Correct?
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Gradient and Divergence in spherical coordinates
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Making a vehicle go straight on carpet
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837
A Braking System with Spikes for Cars
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860
Torque on a Circular Current Loop under a Misaligned Magnetic Field
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Rod with Current on Rails in Magnetic Field
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A problem in applying Kirchhoff's Voltage Law
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979
Body attached to a block by a spring, shaped like an inclined plane
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Ball revolving around a massive disc and a cube placed at centre
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928
A cylinder rotating on a plane with friction and then moving across a frictionless plane to a collision
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Finding the intermediate height of a ball in terms of its maximum height
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943
Time taken for a planet to collide with the Sun
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1K
Why is there no current flow in the middle branch? (Circuits problem)
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Temperature dependence of resistance
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Find the density of surface charges at the boundary of two conductors with different resistivities
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Trying to tie two runners of different speeds over a race
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2K
Can Energy Conservation Solve the Angular Velocity Problem?
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947
How do we represent a triangle wave for input voltage in this circuit?
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882
Why is Radial Acceleration Ignored for a Rotating Board?
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Concept of different accelerations on rotations of rigid bodies
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Relativistic Decay and Separation Between Moving Nuclei A and B
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Looking for observed rotation periods of various Foucault pendulums at different latitudes
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Textbook 'The Physics of Waves': Varying Force Amplitude
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Expression for magnitude of the constant friction force
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Energy conservation equation to find equation for final velocity
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How Many Eggs to Turn a 40lb Flywheel in a Vacuum?
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Effect of rim width on a frisbee's stability and range
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847
Rocket + Connected Body Dynamics problem
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Quantum Mechanics Boundary conditions
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862
Uncertainty in particle position
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652
Reflection probability in Quantum Mechanics
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691
Why is the direction of kinetic/static friction up a ramp?
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Heated gas pushing a mercury column out of a cylinder
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Temperature of two subsystems at equilibrium
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