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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Length contraction problem in special relativity
- woodenbox
- · Replies 3 ·
Finding initial volume in isobaric steam process with dryness fraction
- craglyboy
- · Replies 9 ·
Can an Astronaut Escape an Asteroid with a 1 Meter Jump?
- gagge78
- · Replies 4 ·
Finding spaceship velocity from length contraction of cylinder
- natxio
- · Replies 4 ·
Static/Kinetic Friction, Probelm solving question Purely algebraic
- Prodigium
- · Replies 4 ·
Rotational dynamics (rolling friction)
- mxbob468
- · Replies 1 ·
Calculating Pressure on Snowshoes from 900N Load
- physgrl
- · Replies 2 ·
How do I approach this Moving Charged Particle problem?
- Ki-nana18
- · Replies 2 ·
Confusion about how to work out the uncertainty in my final calculated value
- Pronitron
- · Replies 1 ·
Six easy physics problems (I have the answers, just need instructions.)
- nothing4me
- · Replies 8 ·
Pressure in a Fluid: Same in All Directions?
- physgrl
- · Replies 3 ·
Planet and speff problem find mass
- physicsgurl12
- · Replies 4 ·
Significant figures in seconds to hours calculation
- RossH
- · Replies 3 ·
Finding force constant, not given the value of k
- nicoleb14
- · Replies 11 ·
Vectors - Displacement to Accelleration
- cryodynamics
- · Replies 6 ·
Friction in a brakepad/brakedisc scenario,
- KristianKL
- · Replies 11 ·
A question for all you coffe connoisseurs out there =)
- bac2789
- · Replies 2 ·
Angular acceleration of car tires slowing from 90 to 60 km/h
- nukeman
- · Replies 3 ·
Loop-the-Loop: Net Force on a Ball Moving on a Vertical Loop
- KCEWMG
- · Replies 2 ·
Wavelengths of 500 Hz sound in air versus water at 10°C
- p.ella
- · Replies 1 ·
Calculating Thrust and Resistance
- sammycs
- · Replies 1 ·
What is the period of the ISS orbit?
- KCEWMG
- · Replies 2 ·
Two masses which are connected each other with a spring
- Diff.Ed
- · Replies 1 ·
Why does the lighter person's end go down when both move toward the fulcrum?
- physicsgurl12
- · Replies 15 ·
Magnitude of total resistant force on a car?
- physicsgurl12
- · Replies 1 ·
How far does an 800 g hollow sphere roll up a 25-degree incline?
- jjd101
- · Replies 1 ·
Why do simple harmonic motion and pendulum motion have similar period equations?
- AnthroMecha
- · Replies 7 ·
What Is the Velocity of the First Car After the Collision?
- physicsgurl12
- · Replies 1 ·
Maximum speed for a car over a hilltop without losing contact
- DBaima22
- · Replies 2 ·
Force vector mulitplication = work
- ex81
- · Replies 8 ·
Calculating Gravitational Force Between Two People
- physicsgurl12
- · Replies 4 ·
Tree Cutting Word Problem: Why Does the Short Tree Hit the Ground First?
- physicsgurl12
- · Replies 4 ·
Total Power Radiated by Isotropic Source: 1.885mV
- PassThePi
- · Replies 2 ·
Rotational motion, energy conservation problem
- leapinlizards
- · Replies 1 ·
Ball impulse from floor collision: 2.4 kg ball at 2.5 m/s rebounding at 1.5 m/s
- ajdrausal
- · Replies 2 ·
How do I find velocity when force is not a constant?
- DBaima22
- · Replies 3 ·
Percent of initial total mechanical energy lost during a round trip?
- bmx_Freestyle
- · Replies 7 ·
Mass on an inclined plane w/ FRICTION (use work energy theorem)
- bmx_Freestyle
- · Replies 1 ·
Velocity and Center of mass question?
- nukeman
- · Replies 20 ·
The Relationship Between Kinetic Energy and Reference Frames
- yttuncel
- · Replies 5 ·
Capacitor Problem: Work Done by a Battery in Charging
- sahil_time
- · Replies 4 ·
Calculate the height of a building using scale measurements
- trojanrabbik
- · Replies 1 ·
How Does Snow Accumulation Affect the Speed of Mining Carts?
- chrizzd21
- · Replies 6 ·
Relative Work - not sure what it means-
- yttuncel
- · Replies 3 ·
How Does Removing a Card Affect Currents in Parallel Wires?
- Peter G.
- · Replies 3 ·
Solving a Belt and Pulley Question Using Simple Equations
- Idrees27
- · Replies 3 ·
Length of Pendulum: Does COM Matter?
- AnthroMecha
- · Replies 2 ·
Conservation of Angular Momentum on a Merry-Go-Round
- mrshappy0
- · Replies 1 ·
Calculating Tractive Force and Stopping Distance for a Subway Train
- nathan8
- · Replies 1 ·
Mass on an inclined plane with friction badly
- bmx_Freestyle
- · Replies 1 ·
What is the tension in the offset wires for a horizontal steel beam?
- prokser
- · Replies 2 ·
Rollercoaster velocity question, only given: radius of loop.
- MelissaJL
- · Replies 4 ·
Angle to hit a target 1250m away in sniper projectile motion
- mickstar
- · Replies 20 ·
Finding induced EMF from time-varying magnetic field with Faraday's law
- beanus
- · Replies 2 ·
Linear fit for data (resistance of a wire)
- Cade
- · Replies 13 ·
Projectile Motion on a Inclined Plane Problem
- Diff.Ed
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How Does a Hollow Sphere Accelerate Down an Inclined Plane?
- Eats Dirt
- · Replies 3 ·
Specific heat mixture, final temp, etc.
- 1MileCrash
- · Replies 2 ·
Downforce on connecting rod from brake pad clamping force
- pibot
- · Replies 7 ·
What Is the Common Velocity After Collision on a Frictionless Incline?
- mrshappy0
- · Replies 2 ·
Work and force on a 10 kg mass pushed 50 m on a frictionless track
- gingerkid2323
- · Replies 1 ·
How Is Tension Calculated in a Massless String System?
- mrshappy0
- · Replies 1 ·
Pendulum/Simple Harmonic Motion, what is its energy of motion?
- nicoleb14
- · Replies 10 ·
Solving Momentum Problems: Cart Interactions and Impulses
- beckster
- · Replies 1 ·
Induced Magnetic Field in a Non-Uniform Electric Field
- DNAPolymerase
- · Replies 9 ·
A rim unwinding from a string due to gravity.
- Eats Dirt
- · Replies 2 ·
Easiest Physics Problem Ever Why Can't I Solve
- xgeek
- · Replies 9 ·
Speed of water and height involving fluid mechanics
- physicsdreams
- · Replies 4 ·
Simple center of mass question - Thanks
- nukeman
- · Replies 14 ·
Simple harmonic motion of some mass
- jasonbans
- · Replies 3 ·
Does Friction at the Axis of Rotation Affect Torque Calculation?
- lillybeans
- · Replies 1 ·
Gravitation problem about throwing an object upward
- xnitexlitex
- · Replies 1 ·
Resolution of distant light sources
- grouper
- · Replies 2 ·
Question involving coefficient of friction and force of friction
- Haptic9504
- · Replies 4 ·
How Do You Calculate the Coefficient of Friction for a Skier on an Incline?
- sourna
- · Replies 3 ·
Minimum Height for Loop in Frictionless Incline Track
- mrshappy0
- · Replies 5 ·
Final angular velocity of a mass on a pulley
- austindubose
- · Replies 2 ·
Bullet embedded in block: finding distance, time, and energy loss
- nathan8
- · Replies 4 ·
The weight of an object is 25kgf. What is it's mass if local gravity is 9.6m/s^2
- hakingpawns
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What is the Solution to the Plane and Car Speed Problem?
- karkas
- · Replies 21 ·
Evaporation is a cooling process. What cools and what warms?
- Gc2012
- · Replies 3 ·
Finding R in a RC circuit given battery, capacitance, and time.
- twisted079
- · Replies 7 ·
Finding power in a pulley system lifting a 20 kg box
- nathan8
- · Replies 2 ·
How fast does a mass leave a spring?
- brunokabahizi
- · Replies 2 ·
Rotational Kinematics Football Problem
- lolcheelol
- · Replies 1 ·
Point charge inside insulated thin cone
- jozegorisek
- · Replies 2 ·
Period of oscillation for mass hanging on spring from energy
- Jilvin
- · Replies 6 ·
Finding spring constant in elastic collision of equal masses
- ss85
- · Replies 1 ·
Flywheel storing kinetic energy
- QuarkCharmer
- · Replies 9 ·
Absolute pressure with container
- physicsdreams
- · Replies 6 ·
Finding Centripetal Force Using Lab Data
- haackeDc
- · Replies 2 ·
Total kinetic energy of a spinning chair with weights
- Whowhat2
- · Replies 1 ·
Average power requirement for 2000 lbf elevator traveling 60 ft in 7 seconds
- rrmeche
- · Replies 3 ·
Calculating the flow rate of water from a tap and on the surface of a water tank
- savva
- · Replies 7 ·
Spring-block on incline with tension and friction energy problem
- Reaga
- · Replies 1 ·
Calculating lever arm lengths from mechanical advantage
- YouHelpIPass
- · Replies 2 ·
The moment about the Cantilever beam
- hjkklm
- · Replies 1 ·
A metal rod moving thru a magnetic field
- Nikitin
- · Replies 2 ·
Finding angle as a function of time
- naphtalene
- · Replies 12 ·
Weight of 60kg man in kgf at 9.6m/s²
- hakingpawns
- · Replies 4 ·