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.
Determine the velocity of a package dropped from a satellite
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708
Finding force between solenoid and magnet
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2
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649
Elliptical motion in polar coordinates
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10
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1K
Why Does Calculating Torque at the Ladder's Contact Point Not Work?
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5
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838
Cantilevered and line-loaded steel beam
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19
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1K
Proving the gravitational force of a solid sphere using integration
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5
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1K
Escape Velocity from Earth starting from its Centre
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27
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1K
Why Is Deriving the Motion Formula for Hoops More Complex?
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4
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1K
Electron motion on axis of a charged ring
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7
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1K
Work energy theorem problem -- Block sliding up a curved incline
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10
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1K
For a translating block with slipping find the maximum force F
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2
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807
Fundamental electrokinetics problem calculation using Ohm's Law
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4
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748
Direction of electric field vector on the surface of charged conductor
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9
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2K
Rolling Motion (Stone Gets Stuck in a Tire Going Forward)
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10
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1K
Resonance of a cube floating on water under external force
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8
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888
Verifying that Newton's Equations are equivalent to the EL equations
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15
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1K
Coulomb's law and energy - potential energy
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5
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785
Velocities of four masses | Conservation of Momentum
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7
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897
How Does a Pulley System Affect Scale Readings?
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8
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1K
Intensity of central maximum when width of single slit is doubled
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13
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1K
Deriving ODEs for straight lines in polar coordinates for a given Lagrangian
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8
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1K
Force on rectangular loop by a current in a long straight wire
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4
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2K
Net magnetic force on circuit segment due to 2 parallel wires
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6
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889
Measurements Calculation Problem
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3
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926
A massless disk with an embedded particle rolls down an inclined plane
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17
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1K
Torque question in Deltoid muscle
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7
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1K
Is this projectile motion situation possible?
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6
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1K
How did Cavendish find the density of the Earth?
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24
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2K
Average momentum of an avalanche
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5
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820
Finding the constants of the general approximate solution to a double pendulum
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1
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908
Calculate the average force on the side walls of a container
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5
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789
Find tension using sum of torque (two strings, one beam, one box)
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2
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842
How do you prove ##\lambda = \frac {2L} {n} ## given only L?
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3
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890
Equation of resistance from given graph
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4
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934
Uniform Circular Motion: A plum-bob makes a 70 degree angle...
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4
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849
Find the distance a particle travels
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15
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1K
Finding the x component of position vector
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3
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760
Uniform Circular Motion: Tension Force at Top of Circle
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4
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1K
Find the phase difference between these two sine waves
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21
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985
Frames of Reference: Using tie-downs to hold a load on a flatbed truck
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3
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718
Phase difference between two light waves of the same frequency
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12
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1K
Wave movement and particle movement
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23
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1K
Finding focal length from di v. M graph
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1
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560
Finding slip-off angle for mass off of sphere?
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7
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1K
How Does Impulse Relate to Momentum Change in Physics Problems?
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7
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2K
Need help on a energy question: Hockey puck sliding across the ice
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9
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967
Why Do Capacitors Behave Differently in Series and Parallel Configurations?
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20
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2K
Effect of different magnetic fields on a magnetic dipole
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25
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2K
Planar Coil Rotating in a Magnetic Field
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1
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618
Electromagnetism problem: Merging of 2 charged drops of mercury
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2
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1K
Need help finding uncertainty for this equation
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23
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1K
Find the velocity of the stone just before it hits the ground
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16
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1K
Two blocks in contact -- find the force between them
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14
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2K
Can You Accurately Compare Bearing Slow Down Functions?
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4
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503
Help Calculating probability between 2 limits for the ground state
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28
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2K
POWER - different approach, different results
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23
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1K
Help needed in this problem involving a spring and energy balances
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9
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839
How Does an Iron Deposit Affect Water Levels in Fluid Mechanics?
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10
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1K
When does Phobos collide with Mars?
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72
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2K
Calculation of torque and force on magnetic dipole near infinite wire
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3
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1K
Calculation of magnetic dipole moment of the Earth
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8
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857
Final Charge of a Capacitor in a Circuit with Capacitors and Resistors
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9
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2K
Does a Slowing Piano Exert More Force Than the Man Pushing It?
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3
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695
Why is a current ring approx a magnetic dipole from very far off?
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7
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2K
Where on a rigid body is a resultant force applied?
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11
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1K
Prove this equation for projectile motion
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11
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816
How Does Stress Affect a Hollow Pipe When Force Is Uniformly Applied?
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6
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1K
Understanding MIT's applet on sound with Fourier coefficients
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3
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1K
Find moment arm of resultant force of two forces applied at two points
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3
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1K
A sphere suspended from a cord -- Find the tension
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13
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903
How Is Potential Energy Converted to Kinetic Energy in Physical Systems?
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6
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1K
Why don't we find the angular magnification of objective lens in microscopes?
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10
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1K
Physics 1 Parabolic Motion Question Confusion
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15
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1K
Acceleration in uniform circular motion is uniform or non-uniform?
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55
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3K
Difference between resonance in undamped vs damped mass-spring-dashpot
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17
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2K
Amplitude of harmonic oscillation given position and velocity
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4
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942
Modeling a mass falling from one side of the Earth to the other
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1
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991
Elastic Potential Energy - Positive or Negative?
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5
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1K
How Do You Solve a Non-Equilibrium Pulley System with a 154 Degree Angle?
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10
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755
Where Did I Go Wrong in My Refraction Problem Solution?
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11
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2K
Conservation of energy problem: Ball rolling down inclined plane and then through a loop-the-loop
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10
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2K
Elastic potential energy - different methods, different results
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2
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842
Work Done and Acceleration (Mistaken Answers?)
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5
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669
Faraday's law help -- Induced EMF vs. time graph
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7
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2K
How can I find the sustain time of an electric guitar?
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7
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844
On what does gravity assist depend? (possibly with sources)
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3
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772
Calculation of the magnetic field of four quarter circles
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12
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1K
Magnetic Field Due To Wire Of Semi-Circular Cross Section
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5
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2K
Calculate the gravitational force between these three masses
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4
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741
Vectors Directions: Where is this Resultant Vector Pointing?
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14
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1K
Momentum Physics Problem: Two astronauts throw billiard balls that collide
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8
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1K
Understanding work in translation and rotation of a magnetic dipole
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1
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2K
Current through a circuit when the key is open
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2
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42
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5K
Current flowing in an open circuit
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9
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1K
Change of internal energy during linear transformation
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11
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1K
How does one calculate the number of photons striking a surface per second?
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12
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2K
Find net external work of a system w/ 2 objects w/ opposite forces
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8
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1K
Internal energy won't add up to 0 in cyclic process
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1
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961
Two balls, dropped with a delay of ##\Delta t##, meet after rebound
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2
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34
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2K
Static Equilibrium Reaction Question about Fixed Point
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3
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1K