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.
Question about the energy of 2 blocks with a spring between them
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968
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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806
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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12
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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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9
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767
Making sense of sequence of ideas in MIT OCW's 8.02 notes on Faraday
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1
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2K
Rotating ball and string Rotational Kinetic Energy?
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8K
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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2K
Calculating the spring force constant K
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14
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2K
Determining Inductance L in an LC Circuit
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5
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2K
Power, force, velocity and tension...
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2K
How Do Power, Force, and Velocity Interact?
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14
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958
The ratio between two horizontal speeds in this pendulum arrangement
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1
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777
Inelastic collision of two squares
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14
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890
Two bodies connected with an elastic thread moving with friction
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6
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2K
How to obtain correct negative sign in calculation of motional emf?
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Normal force at the base of a ladder
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20
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How Does Spring Compression Relate to Energy Changes?
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4
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947
Arrow being fired to centre of target
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6
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816
Change in the kinetic energy of a car driving up a hill
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3
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923
Horizontal force on hinge is affected by moving the block farther away?
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11
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854
Need help interpreting a spring-block problem
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35
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3K
Force components for mass attached to two springs
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15
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2K
Molecular speed distribution - most probable speed V
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13
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2K
Which way does this coil turn in a magnetic field?
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989
Compare rotational inertia of 2 paper cups in 2 diff orientations
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12
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1K
Are the Force Equations for Rotational Motion Accurate?
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24
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Particle projected from above a dome
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2K
Avg Power in a Rotational Energy/Work Problem
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2K
Centripetal force - Ferris wheel... Opposite results
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8
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1K
Why Does Light Diminish with a Phase Difference of 5λ?
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6
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1K
Rolling Disk: dynamics versus energy analysis
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9
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805
How to Calculate Water Leakage in an Inverted Bottle Experiment?
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What is the time taken by a pulse generated at the bottom of a string to reach the top?
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8
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2K
Determine the velocity of a package dropped from a satellite
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6
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873
Finding force between solenoid and magnet
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2
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780
Elliptical motion in polar coordinates
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10
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2K
Why Does Calculating Torque at the Ladder's Contact Point Not Work?
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5
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Cantilevered and line-loaded steel beam
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2K
Proving the gravitational force of a solid sphere using integration
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Escape Velocity from Earth starting from its Centre
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2K
Why Is Deriving the Motion Formula for Hoops More Complex?
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Electron motion on axis of a charged ring
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7
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Work energy theorem problem -- Block sliding up a curved incline
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For a translating block with slipping find the maximum force F
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Fundamental electrokinetics problem calculation using Ohm's Law
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Direction of electric field vector on the surface of charged conductor
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2K
Rolling Motion (Stone Gets Stuck in a Tire Going Forward)
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Resonance of a cube floating on water under external force
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Verifying that Newton's Equations are equivalent to the EL equations
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Coulomb's law and energy - potential energy
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941
Velocities of four masses | Conservation of Momentum
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7
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How Does a Pulley System Affect Scale Readings?
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Intensity of central maximum when width of single slit is doubled
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Deriving ODEs for straight lines in polar coordinates for a given Lagrangian
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Force on rectangular loop by a current in a long straight wire
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Net magnetic force on circuit segment due to 2 parallel wires
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Measurements Calculation Problem
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3
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A massless disk with an embedded particle rolls down an inclined plane
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Torque question in Deltoid muscle
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2K
Is this projectile motion situation possible?
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6
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How did Cavendish find the density of the Earth?
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Average momentum of an avalanche
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Finding the constants of the general approximate solution to a double pendulum
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Calculate the average force on the side walls of a container
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Find tension using sum of torque (two strings, one beam, one box)
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How do you prove ##\lambda = \frac {2L} {n} ## given only L?
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Equation of resistance from given graph
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Uniform Circular Motion: A plum-bob makes a 70 degree angle...
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Find the distance a particle travels
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Finding the x component of position vector
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3
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931
Uniform Circular Motion: Tension Force at Top of Circle
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Find the phase difference between these two sine waves
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Frames of Reference: Using tie-downs to hold a load on a flatbed truck
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Phase difference between two light waves of the same frequency
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1K
Wave movement and particle movement
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Finding focal length from di v. M graph
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660
Finding slip-off angle for mass off of sphere?
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7
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2K
How Does Impulse Relate to Momentum Change in Physics Problems?
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Need help on a energy question: Hockey puck sliding across the ice
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9
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1K
Why Do Capacitors Behave Differently in Series and Parallel Configurations?
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Effect of different magnetic fields on a magnetic dipole
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Planar Coil Rotating in a Magnetic Field
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Electromagnetism problem: Merging of 2 charged drops of mercury
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Need help finding uncertainty for this equation
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Find the velocity of the stone just before it hits the ground
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Two blocks in contact -- find the force between them
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Can You Accurately Compare Bearing Slow Down Functions?
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615
Help Calculating probability between 2 limits for the ground state
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POWER - different approach, different results
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Help needed in this problem involving a spring and energy balances
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9
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994
How Does an Iron Deposit Affect Water Levels in Fluid Mechanics?
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When does Phobos collide with Mars?
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