Introductory Physics Homework Help Forum

Post thread
Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Is there anything missing in this motion equation?
  • stephenn
  • · Replies 2 ·
Replies
2
Length of an organ (closed at one end)
  • Jbreezy
  • · Replies 1 ·
Replies
1
Dynamics: Forces at 90 and 45 degrees
  • sv_heavymetal
  • · Replies 1 ·
Replies
1
Boyle's Law - Experiment Question
  • charlottexo
  • · Replies 2 ·
Replies
2
What is the voltage across the resistor?
  • JayLewis
  • · Replies 5 ·
Replies
5
Radiation Exp: Converting μCi to dps & Understanding Half-Lives
  • Von Neumann
  • · Replies 4 ·
Replies
4
Statics problem - too many unknowns?
  • Gauss M.D.
  • · Replies 1 ·
Replies
1
Projectile motion sniper bullet question
  • kaushik29
  • · Replies 1 ·
Replies
1
I think this problem has problem
  • wrrrr95
  • · Replies 3 ·
Replies
3
Validity of Kirrchoff's Laws in Electrical Circuits
  • ehabmozart
  • · Replies 1 ·
Replies
1
Resistors in parallel and series
  • ehabmozart
  • · Replies 3 ·
Replies
3
Need Double Check on a question
  • silentcoder
  • · Replies 5 ·
Replies
5
How Standing Posture Affects Comfort on a Bumpy Bus Ride
  • magneto11
  • · Replies 10 ·
Replies
10
Electrostatics - probably a standard question
  • exuberant.me
  • · Replies 5 ·
Replies
5
How Does the DeBroglie Wavelength of an Electron Compare to Familiar Objects?
  • pdhakal
  • · Replies 5 ·
Replies
5
What equations should I know about Classical Physics?
  • avcireis
  • · Replies 2 ·
Replies
2
Rotational Energy and momentum help
  • mistasong
  • · Replies 3 ·
Replies
3
Rotational Mechanics-Symmetric body goes up an incline.
  • consciousness
  • · Replies 4 ·
Replies
4
A aerialist on a high platform holds on to a trapeze attached to a sup
  • cmkc109
  • · Replies 2 ·
Replies
2
How Is the Diffraction Angle Calculated for Different Wavelengths?
  • MarcL
  • · Replies 3 ·
Replies
3
Short Change Resonance of a Damped, driven oscillator
  • bd2015
  • · Replies 1 ·
Replies
1
FM Radio receiver in RLC circuit with .200 microH Inductor
  • penguinnnnnx5
  • · Replies 5 ·
Replies
5
Problem about uncertainty principle
  • Andurien
  • · Replies 4 ·
Replies
4
What are the Maximum Speeds of a Pendulum with Attached Mass?
  • SherlockOhms
  • · Replies 5 ·
Replies
5
Buoyant Force of a ship and water
  • dab353
  • · Replies 8 ·
Replies
8
How do we know if an electric field is negative or positive?
  • x86
  • · Replies 2 ·
Replies
2
Mr. Fin uses a 710 W hairdryer for 14 minutes per day every day to dry
  • Tj8
  • · Replies 2 ·
Replies
2
Direction of current in the figure?
  • ehabmozart
  • · Replies 3 ·
Replies
3
Understanding Converging Lenses: Question on Image Size
  • dioprem
  • · Replies 6 ·
Replies
6
Angular Oscillation of a rod in a circle
  • Tanya Sharma
  • · Replies 1 ·
Replies
1
Will the ball rotate on a frictionless slope?
  • aerograce
  • · Replies 3 ·
Replies
3
Coffee Filter Lab: Finding n for the Drag Force
  • keicee
  • · Replies 7 ·
Replies
7
Velocity of 2 objects of different masses
  • sgstudent
  • · Replies 18 ·
Replies
18
Calculate Net Electric Field at Point P from Two Charges 45 cm Apart
  • x86
  • · Replies 6 ·
Replies
6
Rotational motion on pulley system
  • NathanLeduc1
  • · Replies 3 ·
Replies
3
The figure below shows an object on an inclined
  • oneshot
  • · Replies 5 ·
Replies
5
How Is the Magnetic Field Calculated in the Normal Zeeman Effect?
  • dinospamoni
  • · Replies 3 ·
Replies
3
How to Calculate Angular Velocity?
  • Sneakatone
  • · Replies 25 ·
Replies
25
A 5.0kg mass is accelerated from rest at the bottom of the 4.0 m long
  • oneshot
  • · Replies 4 ·
Replies
4
Distance of electron from nucleus
  • dinospamoni
  • · Replies 7 ·
Replies
7
Build a Shive Wave Machine - Project 102
  • incegoren
  • · Replies 6 ·
Replies
6
Emf induced by swinging rod in magnetic field (I got 2 answers?)
  • unscientific
  • · Replies 9 ·
Replies
9
Integral of Maxwell-Boltzmann dist.
  • Denver Dang
  • · Replies 2 ·
Replies
2
Electrostatics - find the work done
  • exuberant.me
  • · Replies 4 ·
Replies
4
How Do Angles Affect the Forces in Lifting Tongs?
  • Gauss M.D.
  • · Replies 3 ·
Replies
3
What is the net force on a rocket and how is it calculated?
  • NK92
  • · Replies 9 ·
Replies
9
How Much Work Does a Water Pump Do to Raise Water from a Well?
  • student34
  • · Replies 8 ·
Replies
8
Stern-Gerlack Experiment with silver atoms
  • dinospamoni
  • · Replies 1 ·
Replies
1
How to Calculate the Mass of Jupiter Using Orbital Data
  • bona0002
  • · Replies 4 ·
Replies
4
Car Crash Problem: Solving Speed Before Impact
  • ryantosi
  • · Replies 6 ·
Replies
6
Calculating Electron Probability in a Cone
  • dinospamoni
  • · Replies 1 ·
Replies
1
Thin Film Interference Problem: A hair is placed at the edge .
  • nontradstuden
  • · Replies 8 ·
Replies
8
Help settle an argument Mass system on frictionless pulleys
  • resigned
  • · Replies 6 ·
Replies
6
Is Circular Polarisation the Same as Linear Polarisation?
  • Ezio3.1415
  • · Replies 3 ·
Replies
3
Root mean square velocity question
  • Insiya
  • · Replies 12 ·
Replies
12
Momentum/kinetic energy w/ rifle
  • CollegeStudent
  • · Replies 2 ·
Replies
2
Terminology in rotational kinematics: distance vs displacement
  • JeanJean
  • · Replies 7 ·
Replies
7
Ideal gas law mechanical work problem
  • DrOnline
  • · Replies 8 ·
Replies
8
Newton's second low 3 connecting objects
  • Some body
  • · Replies 5 ·
Replies
5
Optics Problem: A real object and a converging lens
  • anomalocaris
  • · Replies 5 ·
Replies
5
Variable Magnetic field bound in a cylindrical region
  • Saitama
  • · Replies 9 ·
Replies
9
Solving Simple SR Questions: Find Proper Length & Speed of a Spacecraft
  • Murgs2012
  • · Replies 6 ·
Replies
6
Photons Moving Through a Single Slit (Uncertainty)
  • trevor51590
  • · Replies 1 ·
Replies
1
Determining the Thermocline in a Stratified Lake
  • rico22
  • · Replies 11 ·
Replies
11
Momentum change after explosion
  • coconut62
  • · Replies 4 ·
Replies
4
How can velocity be expressed as a function of time in polar coordinates?
  • Clever_name
  • · Replies 23 ·
Replies
23
Descending elevator stops determine displacement of mass on spring
  • jm1379
  • · Replies 3 ·
Replies
3
A uniform rectangular block of length 37.0 cm is placed so that its ce
  • cmkc109
  • · Replies 2 ·
Replies
2
A stubborn, 100.0kg mule sits down and refuses to move. To drag the mu
  • cmkc109
  • · Replies 3 ·
Replies
3
Using Centripetal Forces to find the radius of a circle
  • QuickSkope
  • · Replies 8 ·
Replies
8
A rod is 6 m long pivoted at a point 1.5 m from the left end. Two dow
  • cmkc109
  • · Replies 6 ·
Replies
6
Cross Product of Two Vectors - Mag. 2 & 4
  • Zsmitty3
  • · Replies 5 ·
Replies
5
How Do Standing Wave Equations Relate to Harmonics and Wavelength?
  • oneshot
  • · Replies 3 ·
Replies
3
Bullet hits block connected to wheel and bounces off
  • Sunfun
  • · Replies 14 ·
Replies
14
How does the force get cancel out?
  • cmkc109
  • · Replies 2 ·
Replies
2
Spring Oscillations Problem Question
  • GoGoGadget
  • · Replies 1 ·
Replies
1
Finding period of revolution of stars?
  • rockchalk1312
  • · Replies 7 ·
Replies
7
Size of the Diffraction grating ?
  • Spiral1977
  • · Replies 1 ·
Replies
1
Forced oscillations without damping
  • Dixanadu
  • · Replies 5 ·
Replies
5
Finding Normal and Tangential Acceleration Components in 2D Motion
  • member 428835
  • · Replies 2 ·
Replies
2
Time it would take muon to reach the surface of the earth. Work check.
  • MelissaJL
  • · Replies 8 ·
Replies
8
Calculating Induced EMF for a Changing Magnetic Field Loop
  • nickmanc86
  • · Replies 13 ·
Replies
13
Period of Pendulum A vs B: Find Faster Rate
  • CivilSigma
  • · Replies 3 ·
Replies
3
Time difference of events when moving at relativistic speeds
  • Whistlekins
  • · Replies 3 ·
Replies
3
Throwing a ball from atop a hill
  • swevener
  • · Replies 5 ·
Replies
5
A 42.9cm long tube has a 42.9cm long insert that can be pulled in and
  • cmkc109
  • · Replies 8 ·
Replies
8
Drilling through the Earth problem
  • dinospamoni
  • · Replies 1 ·
Replies
1
Finding Equilibrium in a 3D System of Forces
  • Gauss M.D.
  • · Replies 1 ·
Replies
1
2 Ohm's law/Power equations questions
  • Normalization
  • · Replies 12 ·
Replies
12
Practical uses of oscillator damping
  • Dixanadu
  • · Replies 7 ·
Replies
7
Illuminance on a table directly below a lamp
  • Matthewkind
  • · Replies 2 ·
Replies
2
Standing Waves: Finding the number of antinodes
  • Turion
  • · Replies 1 ·
Replies
1
Calculating phase difference of sound waves
  • Turion
  • · Replies 9 ·
Replies
9
Newtons 2nd law for non-rigid bodies
  • aggie1293
  • · Replies 2 ·
Replies
2
Variable Mass:Sand from balloon
  • CAF123
  • · Replies 8 ·
Replies
8
Finding the incidence angle for refraction
  • SirBerr
  • · Replies 3 ·
Replies
3
What Makes Light Waves Different from Mechanical Waves?
  • Aadrish
  • · Replies 3 ·
Replies
3
Closed ended tube resonance problem
  • AbsoluteZer0
  • · Replies 4 ·
Replies
4
How Fast Must a Block Slide to Circle a Loop After Inelastic Collision?
  • physicslover11
  • · Replies 1 ·
Replies
1
Finding Intensity from an Electric Dipole
  • RLOrion
  • · Replies 6 ·
Replies
6