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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Why Does Friction Act in the Same Direction as the Force on a Rotating Disc?
- sArGe99
- · Replies 1 ·
Block sliding down ramp: finding speed at point B given two initial speeds
- rmunoz
- · Replies 2 ·
Inelastic Collision of a football tackle
- llauren84
- · Replies 8 ·
Very trick velocity vs. time graph
- ChrisEffinSmi
- · Replies 7 ·
Tension and Acceleration in a Pulley System
- wowdusk
- · Replies 5 ·
Dielectric constant of the materials, k
- darkeng
- · Replies 11 ·
Conservation of energy and work
- Knfoster
- · Replies 3 ·
Spring constant and conservation of energy
- Knfoster
- · Replies 6 ·
Ratio of Angular Momentum: Compact Disc vs. Record?
- shadowice
- · Replies 1 ·
Increasing Force: Velocity, Height Calculation
- ShadowDatsas
- · Replies 1 ·
Did I do this question correctly?
- andgabbana
- · Replies 9 ·
Entropy of water and reservoir
- Slepton
- · Replies 2 ·
How much work a battery does connected to a resistor
- Marina1234567
- · Replies 5 ·
Kinetic energy and Angular momentum
- Stryder_SW
- · Replies 10 ·
Calculating Tension Force in a 3-Wire System for a 28 kg Chandelier
- kaycrew22
- · Replies 8 ·
Work, displacement, and gravity problem
- xgoddess210
- · Replies 3 ·
Angular speed of baseball player catching a line drive
- jesi007
- · Replies 1 ·
Calculating Minimum Angular Speed for Michelson's Light Speed Experiment
- phys62
- · Replies 6 ·
Finding spring compression to store 35J of potential energy
- davidliebehar
- · Replies 12 ·
What Is the Passenger's Apparent Weight in an Elevator?
- alexas
- · Replies 5 ·
Power required to move up an incline
- Ut Prosim
- · Replies 3 ·
Temperature of iron and aluminum cubes in boiling water
- reycristobal
- · Replies 6 ·
Minimum Impact Velocity for Pendulum to Swing Over Top of Arc
- gregcor
- · Replies 2 ·
Two boxes are on frictionless ramps (Speed and KE)
- Koskesh
- · Replies 8 ·
Fan attached to a sled blowing at the sail
- cragar
- · Replies 12 ·
Springs: Inclined ramp, object moving down towards spring
- DPatel304
- · Replies 1 ·
Direction of induced current - VERY basic
- physicsfun
- · Replies 1 ·
RLC circuit potential difference
- cupcake
- · Replies 22 ·
How Does Friction Affect the Motion of a Cylinder on Planks?
- sArGe99
- · Replies 2 ·
Finding acceleration of rod and wedge with friction negligible
- sArGe99
- · Replies 8 ·
How Do You Calculate Resultant Forces in a Parallelogram of Forces?
- manich43
- · Replies 4 ·
What Is the Magnetic Field at the Midpoint Between Wires M and N?
- Queue
- · Replies 1 ·
Solving a Skateboarder's Projectile Motion Problem
- Black-Enigma
- · Replies 6 ·
Probably a Kirchhoff's laws problem
- Ownaginatious
- · Replies 1 ·
What are Electrical Potentials?
- jgannon
- · Replies 1 ·
What B-field is required so that the protons are not deflected?
- shimizua
- · Replies 2 ·
An electron in a magnetic field
- dphysics
- · Replies 9 ·
Car Work, Acceleration and Power
- yb1013
- · Replies 10 ·
Power, Work, Kinetic Energy Problem
- yb1013
- · Replies 4 ·
Is angular momentum conserved when a weight falls and spins a wheel?
- bfr
- · Replies 1 ·
Finding the third force to balance two forces 110 degrees apart
- Oscar Wilde
- · Replies 5 ·
Magnitude of electric field due to line of charge
- CentreShifter
- · Replies 3 ·
What Is the Charge of q2 When the Net Electric Field at Point P Is Zero?
- BugsSport
- · Replies 10 ·
An Ion passing through an electric and magnetic field
- dphysics
- · Replies 2 ·
What Is the Rotational Acceleration in a Revolving Door?
- tymartin
- · Replies 1 ·
Solving for V in mgh=1/2mv^2+1/2mr^2(v/r)^2
- Jordash
- · Replies 6 ·
How Do I Solve These Physics Problems on Friction, Forces, and Tension?
- Sweet Sara
- · Replies 3 ·
Calculating Torque and Rotational Inertia for Opening a Heavy Door
- tymartin
- · Replies 1 ·
How to Solve RL-Circuit and Transformer Power Problems?
- Hannisch
- · Replies 3 ·
Spring, Mass, Incline (Conservation of Mech-E)
- rmunoz
- · Replies 4 ·
Calculating Mass of 4.2m Post Suspended by 1,700N Cable
- brentwoodbc
- · Replies 21 ·
Dissipation, resistance, and power.
- exohemmx3
- · Replies 1 ·
Dissipation of Power by Resistors
- cwesto
- · Replies 3 ·
A question on alternating current
- Kudo Shinichi
- · Replies 2 ·
Compressed spring momentum problem
- Knfoster
- · Replies 3 ·
Finding coefficient of kinetic friction on 30° incline
- yb1013
- · Replies 4 ·
Why is the current reading the same in each lamp in a parallel circuit?
- phillyj
- · Replies 3 ·
Finding the Net Electrostatic Force on Particle 3 in a Coulomb's Law Problem
- Langerhorns
- · Replies 6 ·
Hanging a deer from a pole - find tension
- ldbaseball16
- · Replies 10 ·
Finding the Lorentz factor for a spacecraft at 0.4c
- Stratosphere
- · Replies 7 ·
How Close is a Copper Bar to Breaking Under High Tensile Stress and Sound Waves?
- lizzyb
- · Replies 2 ·
Era of recombination - temperature variant
- thomas49th
- · Replies 1 ·
Finding the balance point for a uniform bar with three masses
- Rha1828
- · Replies 1 ·
Modelling Vehicle Deceleration in Simulink: Adding Drag Force Considerations
- Davieslad
- · Replies 1 ·
Frictional implications on non-elastic momentum
- anelmarx
- · Replies 3 ·
Potential difference between the plates?
- dark_angeL23
- · Replies 2 ·
Is a Smart Car Safe in a Crash? Designing an Experiment to Test Its Safety
- woomba
- · Replies 3 ·
Comparing Collisions: Momentum and Energy Conservation
- dherm56
- · Replies 10 ·
Significant figures vs decimal places in lab reports
- Coach
- · Replies 1 ·
Calculating Black Hole Mass Using Reduced Mass and De Broglie's Wavelength
- Enlighted One
- · Replies 2 ·
Calculating Rotational Kinetic Energy: How do I find the answer for part 2?
- makeAwish
- · Replies 2 ·
Fluid, pressure and weight question
- fluidistic
- · Replies 1 ·
Comparing Temperature and Kinetic Energy for He and O2
- jgens
- · Replies 1 ·
Why does a spring force use cos(45°) for small displacements?
- Saladsamurai
- · Replies 4 ·
How Much Can a Fireman Weigh to Safely Climb a Ladder Leaning at 45 Degrees?
- Rha1828
- · Replies 2 ·
Tension in string holding 4.82 kg block to wall on 10.7 kg block
- finniusmorgan
- · Replies 1 ·
Solving Momentum Issues: 98kg Man & 86g Stone Speed Calculation
- AlKaiser
- · Replies 2 ·
Solving Submersible Acceleration: A Physics Challenge
- hank09
- · Replies 1 ·
Potential Energy (WebAssign Question)
- queenspublic
- · Replies 2 ·
Spring (conservation energy) with friction
- neotriz
- · Replies 14 ·
Rotational inertia and torque of a frisbee
- 4t0mic
- · Replies 4 ·
Calculating luminosity density of the universe
- IRNB
- · Replies 1 ·
Forces acting on an inclined object
- tascja
- · Replies 7 ·
Manipulating Data to Form a Linear Graph: A Challenge
- cybernerd
- · Replies 1 ·
Calculating Magnitude of Forces Between Protons
- rayhan619
- · Replies 1 ·
Acceleration of masses in Atwood machine with one on a table
- tascja
- · Replies 20 ·
What fraction of the object's kinetic energy is lost during a single collision?
- 07accordEX
- · Replies 1 ·
How Does a Scale Determine the Mass of a Student on a Beam?
- brentwoodbc
- · Replies 1 ·
Solving Henry Sincosky's Static Friction Problem
- seraphimhouse
- · Replies 5 ·
If earth's poles are reversed suddenly
- yeahhyeahyeah
- · Replies 9 ·
How Does the Normal Force on a Rock in Water Differ with Varying Water Levels?
- phrygian
- · Replies 3 ·
Moment of inertia of thin rod with non-uniform mass
- shotgunshogun
- · Replies 7 ·
Electric field from two charges: where's my error?
- rayhan619
- · Replies 9 ·
Calculating work (positive or negative)
- okgo
- · Replies 6 ·
Finding the magnetic field due to a current
- jumbogala
- · Replies 3 ·
How Can We Use Oil to Estimate Avogadro's Number?
- fluidistic
- · Replies 6 ·
% polarization of partially polarized light
- ken~flo
- · Replies 2 ·
Electromagnetic Repulsion research
- willynilly
- · Replies 9 ·
How Many Coulombs of Positive Charge Are in the Nuclei of 2.0 Mol of O2 Gas?
- rayhan619
- · Replies 5 ·
This is seems like an easy question
- neotriz
- · Replies 1 ·