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.
How Does Thermal Expansion Affect the Movement of a Lever System?
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Will the 2 dimensional sphere rotate?
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Help w/ Circuit Theory: Complex Numbers & Voltage
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Newton's Laws Homework question: Double incline mass problem
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Calculate the magnitude and direction of the torque
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Tension and net torque in a cable
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Why is my thinking incorrect? -- Block and spring driven by a motor
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Time taken for pressure equalization between two tanks
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Conservation of momentum - trampoline
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Calculate the acceleration due to gravity
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Density function, calculating the mass
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Finding the Voltage across a Resistor using the Node Voltage Method
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What are the steps for solving a circuit using node voltage analysis?
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Relationship between voltage, power and current
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Optimal Path for Honeybee to Reach Honey Drop in Minimum Time - No Gravity
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What's the least force we should apply?
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Help with a problem involving motion in two dimensions
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Objects sliding on inclines without friction (connected by a pulley and rope)
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Calculate the sag (deflection) of a membrane
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Potential difference in a 2 disk system (Capacitor)
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Uniform Circular Motion, Find the Tension
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Circular Motion With Constant Angular Acceleration
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Voltage around a loop, half inside a capacitor and half outside
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What is the observed wavelength of the Hα line?
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Find the period of small oscillations (Pendulum, springs)
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Solving for the tangential force for a bead on a wire
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Sound Interference Problem -- Observer moving between two speakers
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Infinite number of identical charges r=a2^n
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AP Physics C Momentum Problem: A dart launched horizonally by a spring gun
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Find Velocity of Particle for System of Charges
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How Does Adding Masses Affect the Angular Velocity of a Rotating Cylinder?
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Interesting Magnetic Field Induction Problem
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Pulley question -- Two unequal masses hanging by a string
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What is the optimal angle for an ant to climb a wire and gutter?
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Snell's law problem about a hemispherical glass ball
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[Compton scattering] Solving for wavelength
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Why is momentum conservation always true in a collision?
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Measuring the resistance of a resistor
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Horizontally launched projectile
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Work Check - Centripetal force - Finding Tension in a Rope
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Question involving the conservation of momentum
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Challenging question about electromagnetic induction
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Number of collisions with a block
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Time of closest approach between two particles
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Electric Fields from Linear Charges
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Phase Difference between Voltage and Current
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Thermodynamics: P-V diagram question
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Determine the angular velocity as a function of the angle
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Circular Motion Application Question
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The Importance of Understanding Different Formulas in Uniform Circular Motion
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Circular Motion Problem: Particle Velocity and Acceleration Calculation
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How effective is Charles' Law in determining absolute zero?
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Max Speed to Move from Point A to Point B
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Sources of errors in a spectrometer experiment
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Need to find final Height, Equation not Working
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What is the magnetic field generated by these two particle beams?
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Troubleshooting a Discrepancy in Atwood Cylinder Solution
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Projectile Motion: Pitcher throwing a ball to a catcher
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How Does a Dropped Ball Affect the Temperature of Water?
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What is the final V in the vertical direction?
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Applying Gauss' Law: Solving Electric Field Problems
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A challenging capacitor problem
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-qEx for a vertical spring in a constant Electric field
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Spin Annhilation and Creator Operators Matrix Representation
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Pressure equalization between two tanks
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How Do You Calculate Resultant Force Vectors and Their Angles?
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Need help with finding thermal and Kinetic energy
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Maximum Horizontal Force of Relativistic Point Charge
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Initial and Final Kinetic Energy
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Correct statement about force between two charges
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Question about Phase Change & Latent Heat
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Alpha Particle Scattering and angular momentum
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Contour Integral to Properly Posting Math Problems on Online Forums
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Calculating acceleration from the coefficient of kinetic friction
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Newton's 2nd law with oscilations
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Train collision (linear kinematics)
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How Does Newton's Law of Cooling Affect Heat Loss Calculations?
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Calculation of resulting force from out of axis Torque
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Gauss law two infinite plane question
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This method may be more intuitive for some people.
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Adiabatic PVT relationships - why Kelvin and not Celsius?
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Comparison horizontal distance in presence of resistance
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A jet comes in for a landing on solid ground
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Balance reading when new object immersed in water
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Flash in rocket will arrive first at front or back?
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Analyzing Forces & Electrons: Free Body Diagram
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Finding the Current in a circuit
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Calculating Separation of Cars in a Convoy Moving at Max Speed
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Free fall velocity and distance
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What is the expression for the velocity of the Car in Vector
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1D Angular Motion with different velocity stages
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Period of Oscillations near equator
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Comparing image sizes of the hotter stars with the cooler stars
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Calculate Net Charge Contained by the Cube
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Need help to solve an oscillation problem.
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Calculate Electric Potential from Non-uniform Linear Charge
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Kinetic energy and momentum of two satellites colliding
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Static equilibrium -- A picture hanging on a wall
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Trajectory of a particle when its position vector changes
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Finding the values of voltage and current in this circuit
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