Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
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Special Relativity with 2 light beams moving towards each other
- Felipe Doria
- · Replies 1 ·
Formulating an Eigenvector Equation
- 2.718281828459
- · Replies 2 ·
What is Upiter's speed when closest to the sun?
- kopinator
- · Replies 2 ·
Equivalent Resistance of Circuit System
- adamkesher
- · Replies 2 ·
Why does my energy go negative with friction, spring, and kinetic energy?
- Seahawks
- · Replies 3 ·
Why Is Electrostatic Potential Independent of Path in a Field?
- Encrypted1
- · Replies 10 ·
Pulleys: One mass hanging between two other masses
- geralt
- · Replies 1 ·
What is the Displacement of the Wedge When the Smaller Block Reaches the Bottom?
- utkarshakash
- · Replies 8 ·
Understanding Diode Current Flow
- alexmath
- · Replies 1 ·
Electric flux through surface with uniform field at angle
- haha1234
- · Replies 9 ·
Toppling of cylinder containing fluid
- Tanya Sharma
- · Replies 6 ·
Particle collision producing C* with gamma decay
- JSGandora
- · Replies 5 ·
How are moments defined and used in physics?
- princejan7
- · Replies 2 ·
Finding the tension force and torque
- Jessica8956
- · Replies 10 ·
Ideal voltmeter readings when meters are swapped in two-supply circuit
- Saitama
- · Replies 13 ·
Normalizing a State Function for an Infinite Square Well
- CuriousQuark
- · Replies 12 ·
Solving the Node Equation for I_2 in a Circuit
- Lee33
- · Replies 8 ·
Confusion to the solution of a MIT ocw problem
- JYangQi00
- · Replies 4 ·
Motion of Two Bodies Orbiting the Sun
- Bashyboy
- · Replies 12 ·
Excess Electrons, Milikan Oil Drop
- Duderonimous
- · Replies 1 ·
Lagrangian of conic pendulum-rod
- Hanuda
- · Replies 1 ·
Displacement of Oscillating Block: y=A cos(ωt+ø)
- paulzhen
- · Replies 4 ·
Finding Center of Mass of Disc with Hole
- Aliasa
- · Replies 12 ·
Inelastic Collision - 2D, find mass, theta, x-component
- tentoes
- · Replies 1 ·
How fast is wave travelling from graph
- negation
- · Replies 3 ·
Metal bar struck by ball: finding angular speed after collision
- bjarnidk
- · Replies 10 ·
What are the pin reactions at A and D?
- MrMechanic
- · Replies 6 ·
Coefficient of static friction of a sliding box
- DB91
- · Replies 10 ·
Show the relative difference in clock time between plane/ground is
- akennedy
- · Replies 2 ·
What Direction is C? Apply the Right Hand Rule
- Tiven white
- · Replies 3 ·
Energy and force in a solenoid with multiple wirings
- fogvajarash
- · Replies 6 ·
How does air resistance change with weight and surface area?
- scioly
- · Replies 27 ·
Calculating charge on capacitor.
- Miike012
- · Replies 1 ·
How Does a Frog's Jump Affect Disk Rotation Time?
- Chase11
- · Replies 15 ·
Feynman's box and tennis balls problem
- vhbelvadi
- · Replies 4 ·
Find tme constant for discharging capacitor
- UselessLadder
- · Replies 3 ·
Why does block C have three cord tensions in its free body diagram?
- princejan7
- · Replies 4 ·
Cycloidal Path of Charged Particle
- theQmechanic
- · Replies 5 ·
Find electric potential and field from Electric Quadrupole
- dreamspace
- · Replies 3 ·
Finding boat acceleration, distance, and velocity with propeller and friction forces
- smartjack
- · Replies 7 ·
Understanding Polarization at Different Phases?
- Srv C
- · Replies 1 ·
Calculating Short Circuit Current with Node Equations
- princejan7
- · Replies 7 ·
What is the Relationship Between Spring Length and Mass Density?
- mkarydas
- · Replies 18 ·
A car is heading 43 m/s east. Find momentum, velocity
- Medgirl314
- · Replies 4 ·
Finding the momentum after a collision
- PhyIsOhSoHard
- · Replies 24 ·
Rolling a ball off a roof (ramp)
- physicsfailure
- · Replies 17 ·
How Do You Calculate Acceleration and Time for a Sprinter Reaching Top Speed?
- cjm1994
- · Replies 7 ·
Diffraction Grating problem (waves and optics)
- pondzo
- · Replies 2 ·
Finding potential of a cone using Laplaces Equation
- Miike012
- · Replies 4 ·
Ant's image is 4.43 cm tall when standing 4.90 cm from mirror
- zoop-loop
- · Replies 1 ·
What Defines the Periodicity of a Driving Force in Harmonic Motion?
- cpburris
- · Replies 7 ·
How Much Heat is Added or Removed in the Reaction of TiCl4 with O2?
- sero2000
- · Replies 4 ·
Find relative speed of fast moving partical with dilated time
- akennedy
- · Replies 5 ·
Does the bottom book accelerate faster when another book is on top of it?
- ViolentCorpse
- · Replies 6 ·
Why Do Capacitors in Parallel Share the Same Voltage?
- oneplusone
- · Replies 5 ·
Finding Forces and Masses in a Hanging Weight System
- BearMan
- · Replies 4 ·
What is the maximum input voltage for valid analysis in the BJT hybrid pi model?
- theBEAST
- · Replies 5 ·
Solve Orbital Period for Two Identical Planets Around Star
- char808
- · Replies 4 ·
Using Relativisitic Units (where c = 1)
- Chetlin
- · Replies 3 ·
Analysis of Billiards Ball Motion Following a Horizontal Queue Impact
- besnik93
- · Replies 4 ·
Is my answer for this work done problem correct?
- warpedfart
- · Replies 5 ·
Position-time graph made with info from a velocity time graph
- jesstryin
- · Replies 2 ·
Calculate Average Emf in Rectangular Coil
- theshonen8899
- · Replies 1 ·
Why Is the Voltage the Same Across C1 and C2?
- oneplusone
- · Replies 9 ·
Two force systems have the same resultant
- bawse
- · Replies 11 ·
Finding the second speed when average velocity is 30 mi/h over two equal distances
- yukapuka
- · Replies 11 ·
Work Done on a Block on an Inclined Plane
- gunjay
- · Replies 2 ·
Calculating Solar Rotation Using Sunspot Observations
- magnanimousto
- · Replies 6 ·
What is the equation for simple harmonic motion with A=14cm and ω=3.0Hz?
- negation
- · Replies 2 ·
How Do You Calculate Sun's Gravitational Acceleration at an Asteroid's Orbit?
- pumpernickel
- · Replies 5 ·
How does a spring-driven piston affect air flow through a nozzle?
- Havaren
- · Replies 6 ·
Calculating torque when force is perpendicular to the lever arm
- mintsnapple
- · Replies 15 ·
Electric Field and charged plane
- Hitchslaps
- · Replies 4 ·
Finding parallel resistors in a series-parallel circuit from measurements
- Sneakatone
- · Replies 6 ·
Magnetic Field at Center of Loop
- tomizzo
- · Replies 7 ·
What Angle Will a Hydrogen Spectral Line Appear in 2nd Order?
- smaan
- · Replies 10 ·
What are the velocities of the balls after the collision?
- lozah
- · Replies 1 ·
Why does a hole appear larger to a moving rod in special relativity?
- Icaro Amorim
- · Replies 12 ·
Finding displacement and velocity for Darryl's tomato delivery route
- jesstryin
- · Replies 5 ·
Volcano model using springs and mechanical parts instead of chemicals
- DChalo
- · Replies 3 ·
Finding Equation for Linearly Changing Density
- rmfw
- · Replies 3 ·
Acceleration of a cart being pulled by a falling mass
- jumbogala
- · Replies 4 ·
Solving Critical Damping Circuit: Find R, i, di/dt, v_C(t)
- zealeth
- · Replies 2 ·
Why Do Different Paths in a Diode Circuit Show Different Voltages?
- Saitama
- · Replies 7 ·
Which Phase Can Withstand a Force?
- spark693
- · Replies 1 ·
Force Calculation for Box on Ramp
- ktkitkat
- · Replies 1 ·
SDOF system with spring, damper and base motion
- lupinpooter
- · Replies 3 ·
Average Acceleration of a Motorboat
- a.k
- · Replies 1 ·
How Is Energy Lost in Elastic vs. Inelastic Collisions?
- icesalmon
- · Replies 2 ·
Finding muscle force and elbow reaction for forearm holding 50N dumbbell
- Ronaldo95163
- · Replies 2 ·
What is the Relationship Between Pressure and Height in Fluid Mechanics?
- Tekneek
- · Replies 4 ·
Solving for Time of Intersection in Vertical Kinematic Problem
- Bryson
- · Replies 2 ·
What is the critical angle for light traveling through glass?
- narendra
- · Replies 6 ·
Net force direction for a box moving in circular motion with friction
- edanzig
- · Replies 3 ·
Deriving angular frequency from mass-spring acceleration equation
- negation
- · Replies 1 ·
Answer:Solve Relativistic Effects: Who Wins the Race?
- Calu
- · Replies 9 ·
How can a resistor supply power in a circuit?
- kexanie
- · Replies 10 ·
Electrostatics problem involving infinite sheet
- Tanya Sharma
- · Replies 7 ·
Coefficient of static friction for a banked curve at 51 m/s
- jonah
- · Replies 6 ·
Length of wire wrapped around a solenoid?
- kylesss
- · Replies 7 ·