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.
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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Deriving Wave Function for One-Dimensional Sinusoidal Wave
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Find the speed of the biker at the bottom of the hill
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Lorentz Transformation - Speeds relative to different observers
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Does the Galilean transform rely on 2 events?
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What Is the Connection Between Buoyancy and Apparent Mass?
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Problem involving Torque and a Derrick from Feynman Exercises
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Angle between normal force and radial line for cylindrical coordinates
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Kinetic energy of an alpha particle
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A Puzzling Equation: Will the Block Slide or Not?
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Calculating Area & Direction of Magnetic Field
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Solve Angular Velocity & Acceleration - Dimensional Analysis
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Healthy Eating for Kids: 5 Simple Steps
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Distance traveled by a Ball affected by friction after t seconds
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How to find resulting velocity in a perfectly elastic collision?
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Inelastic collisions with constant momentum
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Explosion of 2 Carts on a Platform (Momentum)
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Finding Velocity: Ek of the Trolley
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External force on three blocks stacked
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How do I find the work done for a 100 N downward force?
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Finding the WORK done by a crane in lifting a load
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Approximating Answers When Exact Numbers Are Involved
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Analyzing Motion: Deriving Displacement Graphs from First Principles
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Bungee jump | simple harmonic motion
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Why is a small nut attracted to a straw whereas it should be repulsed?
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Static Friction Required to Keep the System from Moving (Two Boxes)
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Derive an expression for the radial charge distribution of an E field
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Why is my method for finding the spring constant incorrect?
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Coin Slipping on a Spinning Wheel
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Period of a simple pendulum with a magnet under it
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Find the Coefficient of Kinetic Friction
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Suvat vector versus the scalar form
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Do you need to account for the water heating up to the boiling point?
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Static Friction Between a Box and the Floor
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How to apply the First Law of Thermodynamics to this problem?
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Why Is Taking Moments at Point A' Incorrect in Rotational Balance Problems?
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