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.
Calculation of Ramp Jump Distance Using Projectile Motion Formulas?
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Help with designing a power generating system
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736
Max Impulse on a pendulum
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Angle that makes kinetic and potential energy of simple pendulum equal
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Introduce a battery to an LR circuit
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Planar pendulum with rotating pivot
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903
What Are the Assumptions and Calculations for Sheet of Charge Theory?
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Cables, pulleys, 2 weights
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797
Balmer series experiment
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1K
Spherical pendulum confusion [Issue resolved]
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684
Launch service between two stations along a flowing river
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Book plots position & force on the same graph, still gets right answer
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Why is source force + electrostatic force = 0 inside battery?
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Relativistic motion and length contraction
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Circular motion doubt: Angular velocity vector for general planar motion about a point in the plane
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900
Critical frequency of Faraday Waves?
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Find starting velocity from golfer launching ball
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7
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845
Why is the electric field inside a conducting hollow/filled sphere zero?
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926
Slope of N - t graph of radioactive decay
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924
Question about Feynman diagram showing annihilation
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4
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910
Coupled oscillator question
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827
Tension in a Two-Crate System on a Frictionless Surface
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7
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913
Forces at play in a pendulum (conceptual doubt)
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7
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764
How do I fix the signs in Faraday's Law in RL Circuit?
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1K
Resistivity calculation from two-probe resistance measurement of sheet
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800
Simple pendulum with moving support
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4
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1K
Change in the unit vectors
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10
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900
Coupled pendulum-spring system
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3
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999
Field transformations in the z-direction
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Pendulum attached to a rotating vertical disk
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The value of the spring constant k that I calculate seems too high
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1K
Understanding the math of definition of electromotive force
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Length of string in a standing wave
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Field due to an electric dipole (Halliday & Resnick, Ch. 27 problem 23)
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3
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606
Understanding a very simply RL circuit
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961
Small oscillations of a simple pendulum placed on a moving block
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5K
Lab Exercise: Measuring "g" using Conservation of Energy
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Kinematics problem from a competition: Will the 2 sliding boxes collide?
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6
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854
Flashing light beacon from Earth reaching spaceship moving away at 0.75c
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5
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681
Rolling Sphere On Incline
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1
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878
Block sliding on a semicircular track with friction
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10
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2K
The maximum reversible work in thermodynamics (2)
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866
Formula derivation connecting vertical water flowrate & horizontal distance moved by a suspended sphere
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7
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207
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10K
Impulse and momentum / work-energy
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947
The maximum reversible work in thermodynamics
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22
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2K
Do you graph the energy levels of a ##1s^1## atom the same as a ##1s^2## atom?
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1K
Magnetic dipole moment and integration surfaces (Introductory Electromagnetics - Magnetistatics)
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4
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994
Charge on a grounded conducting sphere in a uniform electric field, after ungrounding and movement
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Conservation of momentum (center of mass) in projectile launches
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Range of frequency heard by observer related to Doppler effect
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Vertical displacement with time of a projectile
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Spring Constant Force Problem Help
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Is current flowing into a battery always equal to current flowing out?
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Total Internal Reflection and Transmitted Wavelength
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Understanding self-inductance in a solenoid.
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Condition for resolution of two point sources of light
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How do I model this function? (Damped Harmonic Motion)
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Emf in coil rotating inside magnetic field
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Refraction of light when traveling from air to glass
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Finding critical angle: not sure which one is correct
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Origin of repulsive force on a magnet approaching conducting ring?
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A wheel of radius r rolls along a curve
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Electronic Circuits - Calculate voltage
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Newton's third law and weight
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Query related to Two-Dimensional Motion
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1K
Camera drone and speed of air below it
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Graph of viscous force and velocity
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Projectile motion, initial height and range given, find initial velocity
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Need to derive a formula for the number of red giants
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Question about time dilation
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Derive trig equations 4, 5, and 6 from 1, 2, and 3
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Friction - same direction as motion?
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Center of mass acceleration for an inclined plane and mass m
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How Much Vertical Acceleration Does a Jet Need to Avoid a Hill?
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How Does Coriolis Force Influence Particle Motion in Rotating Systems?
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2 Masses attached by a spring in the vertical axis
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Minimum work done to push the cube over
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Gauss' Law for a conducting / non-conducting sheet
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Is the Charge Conservation Correct in This Meson Decay Feynman Diagram?
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Find the value of ##t## when ##P## returns to ##X##- Kinematics
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Find the tension in the rope PQ
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How Do You Correctly Cancel Angular Momentum in Physics Problems?
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Question about acceleration of free fall
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Calculate voltage over capacitor and resistance
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Solve the problem involving the velocity - time graph
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Question about the energy of 2 blocks with a spring between them
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How Is Work Calculated on a Conveyor Belt with Friction?
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Find the initial velocity ##U##
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How Does Energy Transform in a Bungee Jump?
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2 Masses and a Wheel (with mass)
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Horizontal force by block on a beam
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Calculate the frequency of rotation when a coin flies off a turntable
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Trouble solving for end state of two control volumes in a rigid tank
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Help again in interpreting a pulley with a spring and a block
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Find the value of ##T## and distance of particle in the first ##4## seconds
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A small disk and a bigger half disk
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728
Making sense of sequence of ideas in MIT OCW's 8.02 notes on Faraday
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Rotating ball and string Rotational Kinetic Energy?
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Why Isn't the Spring Force Sum of Both Ends?
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What is the induced magnetic force on this closed current loop?
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