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.
Discovering Vector Direction in Conservation of Energy Problems
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Calculating Linear Charge Density of a Cylinder
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Finding a Parametric Solution for Particle Trajectory in Magnetic Field
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Which statement is true? (Velocity and Acceleration of a Tennis Ball)
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Discontinuous voltage graph for bullet going through metal coils
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Solving a Problem with an Easier Way: Moving the Origin
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B-field for a half-infinitely long wire
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Fluid Forces in a Manometer: Understanding Pressure and Kinetic Energy
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Solving a V-vs-s Problem: John's Quandry
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Max speed of proton in cyclotron
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Finding velocity for projectile given distances and launch angle
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Graphing electric potential for two positive charges
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Fictitious forces on a rigid body
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Which system to apply conservation of momentum to?
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How do I find way of comparing the density of the Earth and the Moon?
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Solving for Simple Harmonic Motion: A Picture Problem
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Electrostatics homework problem help
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Integrating electric field of rod
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I cannot work out constants a and b --
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Is the Instantaneous Circle Proven When Centripetal Force is Removed?
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How do I accurately calculate work done against friction?
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Average force when a bouncy ball collides with surface
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How does relativity affect the detection of atmospheric muons?
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How Do You Determine Equivalent Capacitance in Complex Circuits?
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Standing wave, phase and antiphase
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Difference in Wave Phase Question
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Volume-pressure equation for an expanding ideal gas
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Understanding Velocity Addition Laws for People on Train & Ground
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Investigating Unexpected Results in Elementary Experiment
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Determining if a pipe is open or closed from given the resonant frequencies
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When is power constant in this scenario?
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Question's Diagram: Am I Right?
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What is the electric field strength inside the capacitor?
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What exactly is wrong here? (F=ma when Force and acceleration are zero)
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Why Is 686 m/s Incorrect in Physics Calculations?
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Heating up of tyres on the road
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Proving SHM for charged spring mass system in electric field
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Electric field at surface of lead-208 nucleus
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How Do You Convert Seconds to Nanoseconds in Scientific Notation?
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When is Torricelli’s Law an Approximation?
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Why Does Hooke's Law Seem Contradictory in Calculating Spring Energy?
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Finding value of unknown charge
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The Mass of a Black Hole versus its volume
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Given a Constant Acceleration magnitude of g/4, Find the value of t
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Using Kirchhoff's law, deduce the value and direction of the current
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Circular Motion with Decreasing Radius
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Rotation and torque about an accelerating point
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Conductor rolling down an inclined plane in a vertical B-field
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Why optical pyrometer gives a low reading?
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Force between 2 point charges in VECTOR format (x i + y j + z k)
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Coordinates of a point on a rotating wheel
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Perfectly elastic collision between two electrons in ⊥ B-field
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Calculating Shannon Entropy of DNA Sequences
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Magnetic Field Due to a Curved Wire Segment
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Pulley with friction, how to get the friction in the pulley?
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Finding the weight of an object submerged in water
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Electric field due to n charges
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Magnetic Field Surrounding a Straight Conductor
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Solving for the Unknown in a Math Equation
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Finding Value of ##N_A## and P in a Frame
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How Do Contact Lenses Correct Myopia and Alter Near Point Vision?
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Finding percentage and absolute uncertainties
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Electric field due to two charges
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Pan suspended by a spring (Energy + SHM)
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Doubling the Thermal Energy of a Frozen Chocolate Bar
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Interpolate between 2 impact points only given the throw angles
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Why do we need to take the absolute value of charge in an electron gun?
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Determine expressions for the following in terms of M, X, D, h and g
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Struggling to rearrange a formula to find c
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Specific Heat Capacity of a metal bar placed into water
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Work calculation for lifting a Tetrahedron-shaped object from the water
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Doing experiment to find the authenticity of Archimedes' law
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Kids on a merry-go-round & Relative Motion
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Experimental Design: Pulley and Mass Hangers
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Find elastic energy in the compressed spring.
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A cart collides with a bumper -- Find the final displacements, etc.
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Magnetic and Electric Fields problem
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The Mystery of Heat Loss: Examining Ice Melting Without Heat Loss
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Find the electric field of a long line charge at a radial distance
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Is Moment of Inertia Dependent on Surface Movement Away from Axis?
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Force on a Cyclist: Net Force Calculation
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Understanding Molecular Vibration of HF: Equilibrium Distance and Binding Energy
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Determine the point of application of a resultant force
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Drawing the Graph: Analyzing Solutions and Questions
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Link between increase in Potential energy and the thermal energy lost
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Angular velocity of an oxygen molecule.
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Alternative method of finding Electric flux from non-uniform field
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Why Are My Kirchhoff Voltage Rule Equations Incorrect?
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Unclear differential equation from a thermodynamics textbook
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Tried Solving a Problem but Need Help?
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Symmetry behind charged spring-mass system in Electric field
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Heat Radiation question (skin's reaction to UV versus IR radiation)
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Why is the elastic potential energy in position 2 zero?
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Rocket Problem -- Solve using the Rocket Equation
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Calculating the Electric field inside an infinite planar slab using Gauss' Law
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Error propagation leads to different uncertainties, which do I choose?
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Rotating Rod in Plane: Kinetic Energy & Moment of Inertia
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Torque on two pillars (introductory physics problem)
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The FBD Mystery: Why Isn't Normal Force Along Radial Line?
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I try to solve a thermodynamics problem on heat transfer
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