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 one calculate the number of photons striking a surface per second?
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Find net external work of a system w/ 2 objects w/ opposite forces
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Internal energy won't add up to 0 in cyclic process
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Two balls, dropped with a delay of ##\Delta t##, meet after rebound
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Static Equilibrium Reaction Question about Fixed Point
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Why can we use this approximation in rotational work-kinetic energy theorem for small displacements?
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How Do You Begin Creating a PV Diagram from Complex Data?
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Instantaneous Acceleration Given Equation for Velocity
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Minimal rotational kinetic energy for a gyroscope to precess
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How does this potential divider circuit work?
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Vertical Mass Spring System | Analyzing work
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Understanding relative velocity in 1D elastic collision
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Stefan-Boltzmann's Law. How to apply to the Sun
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776
Why Does Surface Tension Allow Bubbles to Form Despite External Pressure?
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Optimizing energy expenditure over a race course in cycling
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994
Does levitation distance increase as Fg increase???
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Sign of Work (Negative or Positive)
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808
Kinetic energy in center of mass reference frame
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How Can Derivatives Determine Speed in Physics Problems?
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Work Pulley Problem with constant speed
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A ball is thrown w/initial speed vi at an angle 𝜃i with the horizontal
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Spinning a Bucket to measure gravity with the parabolic surface of the water
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Angular acceleration of plank hanging off edge with a weight
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Compare the conductance of an insoluble salt with soluble one
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Circuit with potential difference across battery being zero?
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How Do You Calculate Wire Extension Under Sudden Loads?
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Final velocity of the barbell dropped after a dead lift
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953
How can I calculate the Density and Volume of a mechanical mixture (atoms)?
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Why do the headlights on the car become dim when the car is starting?
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Why Is Energy Released in Nuclear Decay Equal to Change in Binding Energies?
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Translational Equilibrium Practice problem
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Worst-case power consumed by a circuit with MOSFETs
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Flux linked with circular coil vs solenoid
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Can Two Particles Have Multiple Collisions in a Single Interaction?
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How force on atom in diatomic molecule varies with distance
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Electromagnetic Induction in AC circuits
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Using energy considerations to analyse particle motion
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3
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943
Dragging an object: what is Fmin and magnitude of acceleration?
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3
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Comparison between two Tippe tops
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713
Why does mass not affect sliding speed down an inclined plane?
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990
Find the value of ##θ## and frictional force acting on the block.
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Find the Tension in the cable when the lift is moving at constant speed
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Using energy considerations to determine speed
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760
Series RLC circuit connected to a DC battery
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Finding the center of mass of a piecewise function
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Confused by Lorentz transformation equation
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Final speed of particle far away from rings with opposite charges
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Is the Total Energy Change in a Closed System Always Zero?
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Sound absorption/Acoustuic attenuation coefficeint (α(ω)) of PVC foam?
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Is potential energy defined only for internal conservative forces?
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How to Determine Temperature Difference Between Two Stars Using Spectral Lines?
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A sphere held steady on a slope by a rope
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Find force as a function of position: F=F(x) using v=v(t)
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Refractive index of seawater and a diver transmitting RF for 100 meters
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Bead sliding along wire with constant horizontal velocity -- Shape of wire?
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Forces applied to a spring-loaded gas pedal
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Index Notation, Identity Matrix
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Create a physics problem for me!
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The movement of a package on a conveyor belt
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Calculate how much weight the crane could lift
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Energy stored in a double spring system
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Torque calculation based on distributive load
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How Much Explosive Force is Needed to Overcome Drag and Elevate a Car?
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How should this Beam Loading experiment be designed?
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Surface area of inclined XY plane at 45 degrees
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Two masses on a slope with a connected tension force
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How to write this expression in terms of a Hyperbolic function?
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(Magnetism) Magnetic pull force on a steel ball
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Why is the Bridge Crane Force 2820 N?
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Gauss' law for a cavity in an insulator
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Punching a hole in a tape moving at relativistic speed
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Fast and Furious Scene Analysis
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Can the polarity at the 2 ends of a solenoid be the same in normal conditions?
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Special relativity and standard configuration
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Calculating Force and Acceleration in a Two Block System with Varying Friction
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How to calculate velocity of infinite-stage rocket?
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How does burn time affect the parameters in the rocket equation?
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Tension & Circular Motion Question - Looking for speed
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Conservation Laws and Velocity Reversal in 1D Collisions
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Final Velocity of a car with a opposing decreasing drag force
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Can You Convert Meters to Kilograms?
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Kinetic Energy being larger than Mechanical Energy in a Hotwheels Lab
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Amplifier gain in resonant RLC circuit
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How does a difference in air pressure induce a force?
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Having a hard time learning Newton's 2nd law
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How Do You Incorporate Drag Force in Free Body Diagrams for Multiple Objects?
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What is the definition of the dalton (Da) unit?
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Magnetic field due to electric wire
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Can the Voltage Across a Capacitor Be Greater Than the Source Voltage in a Series RLC Circuit?
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Calculate the magnetic moment of a rotating sphere
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Ejected out from an accelerating spaceship
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Find the man's tension pulling the rope
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Calculate density of neutrons in a beam
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How does the rise in temperature of fuse wire depend upon its radius?
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Relative Motion: Understanding the Relationship Between Moving Objects
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Catching a loaf of bread thrown vertically at a window
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Can the Magnetic Field Be Determined Using Biot-Savart Law Superposition?
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How do we know the point of 0 electric field is on the axis?
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How Does Changing Distance Affect Microwave Path Difference?
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How to find the cube roots of a real number not equal to 1?
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