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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Current through an inductor connected directly to a battery
- Nick O
- · Replies 4 ·
A car and a train colliding with each other.
- GreenTea09
- · Replies 1 ·
Angular velocity of a ball+rod falling through 90˚?
- Esoremada
- · Replies 1 ·
Conservation of momentum problem
- bookerdewitt
- · Replies 2 ·
Calculating the Period of Oscillation for a Mass Attached to a Spring
- Panphobia
- · Replies 29 ·
How Does Ohm's Law Apply to Different Electrical Scenarios?
- lemmechill
- · Replies 3 ·
Electricity circuit question, amplitude resistor?
- Michael 37
- · Replies 21 ·
Charge on point charge to create a spark
- chicagobears34
- · Replies 11 ·
Hohmann transfer towards mars: True Anomaly of Earth/ Launch date
- Paul Gray
- · Replies 6 ·
Given force, find the change in kinetic energy
- oneplusone
- · Replies 7 ·
Calculating Nuclear Fusion Energy
- frazzle96
- · Replies 2 ·
Flow through a venturi meter (TEL)
- SherlockOhms
- · Replies 2 ·
Molniya Orbit: calc angular displacement of ascending node
- Paul Gray
- · Replies 7 ·
Power required the support a helicopter
- Doyouevenlift
- · Replies 5 ·
How Far is the Spaceship from the Planet at the Time of Explosion in its Frame
- greendog77
- · Replies 3 ·
Laminar Flow: Finding Viscosity of Oil
- Panphobia
- · Replies 6 ·
Pulling a submerged car wreck out of the water
- Doyouevenlift
- · Replies 7 ·
Two blocks and a mass- and frictionless pulley
- scomber
- · Replies 8 ·
Calculating Orbital Period of 3 Planets with Similar Mass
- woaini
- · Replies 13 ·
Capacitor Plate Charges After Switch is Closed
- Saitama
- · Replies 21 ·
What is the acceleration and time for a block on an inclined plane?
- rumblef1sh
- · Replies 1 ·
Two systems merging, what is final temp?
- mateomy
- · Replies 1 ·
Determine the enthelpy of formation to find the enthelpy of reaction
- needingtoknow
- · Replies 15 ·
Inelastic collision in opposite directions: KE lost & angular momentum
- vaxxa
- · Replies 4 ·
Conservation of Energy of a block and spring
- kimlu
- · Replies 3 ·
Calculating the force of friction on an object
- purplecows
- · Replies 3 ·
Torque and Moment of Inertia of a black ring
- Solemony
- · Replies 1 ·
How do I use Bow's notation to solve vector sums with only one force?
- anthonyk2013
- · Replies 13 ·
Find a function of velocity relative to x
- etchzel
- · Replies 2 ·
What Happens to the Bar Magnet When the Switch is Closed?
- outxbreak
- · Replies 3 ·
Bullet Through Pendulum Bob-Inelastic Collision
- DubbTom
- · Replies 6 ·
Find acceleration due to large planar ring
- oddjobmj
- · Replies 7 ·
What is the magnitude of the loop current at t = 1.3s?
- RenD94
- · Replies 2 ·
Basic Question about Force for Fluid Mechanics
- physicswork
- · Replies 5 ·
Calculation of work involving unit vectors
- bakakun028
- · Replies 2 ·
Simulated Gravity through centrifugal force concept questions
- AFSteph
- · Replies 5 ·
Collision of Atoms: Find Motion & Speeds
- Dave218
- · Replies 1 ·
How Do You Calculate the Horizontal Force on a Pendulum?
- nx01
- · Replies 10 ·
Solving Momentum with Strings - PhysicsForum
- alingy1
- · Replies 2 ·
Simple friction problem? Maybe not (multiple inclines)
- I'msorry
- · Replies 7 ·
Energy problem dealing with heat extracted from cold air
- astru025
- · Replies 3 ·
Quasi-static, adiabatic problem
- mateomy
- · Replies 13 ·
Stuck in this question - 2 spinning disks brought together
- daveamal
- · Replies 22 ·
What is the Current Understanding of Monopoles in Physics?
- Abscissas
- · Replies 2 ·
Acceleration due to gravity of rod
- oddjobmj
- · Replies 4 ·
Final Velocity of a Spaceship Approaching Earth from Infinity Due to Gravity
- Luke1121
- · Replies 4 ·
How Do You Calculate the Final Speed of a Sliding Ice Block on an Incline?
- rodrj183
- · Replies 6 ·
Is Work Done by Gravity Equal to Change in Potential Energy?
- hb20007
- · Replies 7 ·
Calculating Charge & Electric Energy Above a Plane
- bg646
- · Replies 1 ·
Calculation actual efficiency problem
- astru025
- · Replies 5 ·
Centripetal Force and ball of string
- merlin.matt
- · Replies 1 ·
E= 2.377074x1010 J * 380 kgE= 9.038314x1012 J
- hsphysics2
- · Replies 8 ·
Thermal physics - entropy change (latent heat, specific heat etc)
- Flucky
- · Replies 2 ·
Bowling ball goes from sliding to rolling
- MuIotaTau
- · Replies 6 ·
Power Radiation Ratio of Venus and Earth
- rnjscksdyd
- · Replies 2 ·
How Do You Calculate the Kinetic Energy of Particles in Relativistic Decay?
- PsychonautQQ
- · Replies 3 ·
How Do You Find the Sum of Moments at an Angle?
- k31453
- · Replies 5 ·
Work Energy: Find Tension at Bottom of Circle
- hsphysics2
- · Replies 4 ·
Finding Values in a Complex Circuit
- KieranRye
- · Replies 6 ·
2D Vectors - Addition and Subtraction of Successive Displacement Vectors
- bearjew11
- · Replies 20 ·
Rotational Kinetic Energy and Frictionless Surfaces
- econ94
- · Replies 2 ·
Calculating Initial Acceleration for a Steel Object on a Rail | 21 N Tension
- rysezhae
- · Replies 2 ·
Plot g(r) of planet with two distinct density regions
- oddjobmj
- · Replies 10 ·
Solving Q3 of AND and OR Circuits Challenge
- smo2012
- · Replies 9 ·
Number of elastics needed to safely fall
- shadowblades
- · Replies 1 ·
Using Henry's law for dissolved methane in a well
- zaboda42
- · Replies 5 ·
Mass, magnitude, direction of vectors
- jdroidxw
- · Replies 6 ·
Special Relativity kinetic energy
- PsychonautQQ
- · Replies 4 ·
Two-Degree-Of-Freedom Linear System: Eigenvalue problem
- Valeron21
- · Replies 7 ·
Frictionless horizontal then ramp?
- conniebear14
- · Replies 5 ·
Forced Oscillator with unfamiliar forcing function and constants
- oddjobmj
- · Replies 51 ·
Vector Problem: Solving Displacement & Speed of Contact
- dreamer_asot
- · Replies 1 ·
What is the Magnetic Field at a Point 10cm from the Center of Two Finite Wires?
- freshcoast
- · Replies 34 ·
What is a Short Link in a Truss (Statics)?
- Meta14
- · Replies 1 ·
Direction of Magnetic Force in Relation to Electron Movement
- STEMucator
- · Replies 8 ·
Physics heat problem Using calories.
- astru025
- · Replies 3 ·
Forces on a Ramp: Understanding Fcosθ - mgsinθ = ma
- frownifdown
- · Replies 1 ·
How Does Electric Putty Conduct Electricity Compared to Metals Like Copper?
- Alaya1
- · Replies 2 ·
Finding the magnitude and direction
- BOAS
- · Replies 4 ·
Finding The Distance Between An Observer and Light Source
- embphysics
- · Replies 14 ·
Proving that a free electron can't fully absorb a photon
- squareroot
- · Replies 6 ·
Solve Dielectric Problem: Parallel Plate Capacitor w/ Wedge Insert
- Avatest
- · Replies 1 ·
Y to Δ transformation of a circuit
- sevag00
- · Replies 8 ·
Circular Motion and Oscillationshave been sick and am lost
- yvette262
- · Replies 1 ·
How Is Angular Speed Calculated in a Dual Disk System with a Falling Mass?
- Lamebert
- · Replies 3 ·
Vector problem - solving x y z using angles between vector and axis
- Ascendant78
- · Replies 5 ·
Phase Angle between Voltage and Current
- theintarnets
- · Replies 4 ·
Magnitude of torque in a circuit?
- Violagirl
- · Replies 1 ·
Single Slit Problems: Calculate Width of Central Maximum
- Plasmosis1
- · Replies 2 ·
Find Distance for 1.2cm Circular Diffraction Pattern
- Plasmosis1
- · Replies 1 ·
Calculating New Northward Speed of Air Parcel
- Mearskii
- · Replies 1 ·
How Does Equilibrium Apply in the Classic Ladder Problem?
- gamegene9060
- · Replies 3 ·
Am I doing this torque problem right?
- gamegene9060
- · Replies 6 ·
Conservation of Momentum- Inelastic Collisions
- Crusader711
- · Replies 5 ·
Capacitance (why are the charges no the same?)
- 360705474
- · Replies 3 ·
What Does the Potential Energy Equation U(x) Tell Us About Motion and Forces?
- darksyesider
- · Replies 3 ·
Sliding Block Attached to a Spring
- AltruistKnight
- · Replies 1 ·
Banked curve with friction, but no angle
- puzzledup
- · Replies 2 ·
Solve Time to Pull Illinois Jones from Pit
- frownifdown
- · Replies 1 ·