Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Why can't moment of Inertia be never greater than MR2
  • andyrk
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How to find the point between Mercury and the Sun so force = 0?
  • agentlee
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Uncertainty-what is the rate with 0.59% precision?
  • Outrageous
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Finding Ratios of Velocities After Impulsive Force on Rod of 3 Equal Masses
  • keyboardkowboy
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Field due to a solid hemisphere with uniform charge density
  • PhizKid
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4
Is 'g' Negative? Understanding the Confusion of Definitions
  • SecretSnow
  • · Replies 28 ·
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28
Characteristics of a rigid body.
  • andyrk
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5
Thermodynamics Heat Radiation Problem
  • astral87
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Kinetic friction incline problem
  • Nirupt
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1
I am glad I could help.Effective spring constant for two springs and a pulley
  • judas_priest
  • · Replies 13 ·
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13
Calculating Voltage in a Parallel Branch
  • judas_priest
  • · Replies 13 ·
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13
Determine the relative distances of each of the planets from the Sun given [ ].
  • s3a
  • · Replies 19 ·
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Torque, gravity, and equilibrium
  • musicalmedicin
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5
Have I Correctly Converted a Velocity-Time Graph to a Position-Time Graph?
  • STEMucator
  • · Replies 5 ·
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5
How do different forces affect the acceleration of a spinning uniform disk?
  • BadSkittles
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Finding the magnitude of the resultant vectors
  • fxsnowy
  • · Replies 3 ·
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3
Question regarding kinematics
  • sankalpmittal
  • · Replies 18 ·
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18
Problem regarding induction and Gauss' Theorem
  • sankalpmittal
  • · Replies 10 ·
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10
Rocket Pushing Box in Empty Space
  • adjacent
  • · Replies 8 ·
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8
Tangetial acceleration in elliptical orbit
  • bkraabel
  • · Replies 1 ·
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1
Rolling Resistance without slipping
  • andyrk
  • · Replies 5 ·
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5
Physics help for two questions please
  • bri22
  • · Replies 1 ·
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1
Does Pure Rolling Exclude Kinetic Friction?
  • andyrk
  • · Replies 4 ·
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4
Power of EM Wave Absorbed by Circular Disk of Radius 2m
  • NA19
  • · Replies 3 ·
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3
Rotational Kinetic Energy of Disks
  • chrisa88
  • · Replies 2 ·
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2
Calculating Projectile Height: 30 Degrees vs. 60 Degrees
  • HadanIdea
  • · Replies 7 ·
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7
Time it takes for an electron to travel a set distance
  • Reprisal35
  • · Replies 6 ·
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6
Angular velocity, acceleration, and torque
  • BadSkittles
  • · Replies 4 ·
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4
Discussion question from university physics
  • hagglebaby
  • · Replies 2 ·
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2
Coefficient of kinetic friction for lab
  • catzmeow
  • · Replies 16 ·
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16
Where is the Electric Field + Potential zero? Draw a graph
  • Reprisal35
  • · Replies 19 ·
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19
What Are the Unknown Masses and Tensions in a 20kg Static Pulley System?
  • Suarden
  • · Replies 3 ·
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3
2 Atomic Physics questions - Pauli exclusion principle
  • daleklama
  • · Replies 1 ·
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1
Grounding Node Analysis: Understanding the Basics
  • judas_priest
  • · Replies 6 ·
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6
What is the capacity of the capacitor?
  • tsgkl
  • · Replies 7 ·
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7
What Is the Correct Formula for Normal Force on a Sloped Surface?
  • Robertoalva
  • · Replies 2 ·
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2
Force Between Two Conducting Spheres
  • Paras Lehana
  • · Replies 5 ·
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5
Revolution of moon and satellite
  • Asla
  • · Replies 1 ·
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1
Pressure~Gas Law Homework - Find Avg Pressure
  • clovergogo
  • · Replies 3 ·
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3
Can a sphere in pure rolling motion ever slow down?
  • andyrk
  • · Replies 5 ·
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5
Block moving with angled force
  • Robertoalva
  • · Replies 5 ·
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5
Rotational Intertia of a rotating Space Station
  • slingshotnz
  • · Replies 4 ·
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4
What does frictionless pulley really mean?
  • andyrk
  • · Replies 4 ·
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4
Electric fields change in the spacing between the plates?
  • tsgkl
  • · Replies 1 ·
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1
Kinematics Min/Max angles of a projectile
  • ieaglei
  • · Replies 16 ·
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16
Blocks with a 'x' force and a 'y' acceleration
  • Robertoalva
  • · Replies 19 ·
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19
Electric Potential Difference for Speed of Light Percentage?
  • aszty8
  • · Replies 5 ·
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5
Rolling without slipping and acceleration
  • andyrk
  • · Replies 18 ·
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18
Center of Mass of Uniform Symmetric Bodies
  • andyrk
  • · Replies 9 ·
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9
Gravitational Potential Energy question
  • stefiex
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2
Calculating Work: Gas in a Horizontal Cylinder Heated from 300K to 400K
  • Asla
  • · Replies 6 ·
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6
Relation between Change in Potential Energy and Work Done
  • andyrk
  • · Replies 4 ·
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4
What is the angle of an incline with a ratio of 1:25?
  • HadanIdea
  • · Replies 1 ·
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How Do Non-Conservative Forces Affect Potential Energy?
  • andyrk
  • · Replies 5 ·
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Calculating time period of oscillation
  • Saitama
  • · Replies 21 ·
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21
Use of a non-inertial reference frame in a problem involving rotation?
  • serllus reuel
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What Is the Correct Progressive Wave Equation for a Particle at Origin?
  • hhm28
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Voltage difference of the wing of an airplane in Earth's magnetic fiel
  • aChordate
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Solving for v: "Calculating the Speed of Puck After Collision
  • BadSkittles
  • · Replies 1 ·
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Finding the Force of Friction and Minimum Mass for a Moving Block System
  • postfan
  • · Replies 5 ·
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5
What are the measurements of Earth in physics?
  • Furfox
  • · Replies 8 ·
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Estimating the (average local field)/(Applied field) in water
  • Order
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2
How to Calculate the Electric Charge of a Capacitor with Mixed Dielectrics?
  • chmate
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3
How to Draw an Acceleration vs Displacement Graph?
  • hav0c
  • · Replies 3 ·
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3
Find the mass of a cat as it walks across a plank
  • agentlee
  • · Replies 9 ·
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9
Radial acceleration in uniform circular motion
  • andyrk
  • · Replies 12 ·
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12
Object whose gravity makes milk behave as in spinning bowl
  • bkraabel
  • · Replies 1 ·
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1
Why don't we feel the Earth moving?
  • alingy1
  • · Replies 23 ·
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Greatest Lever Arm: Calculating Force at Elbow Joint
  • NA19
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5
A car on black ice is on a banked road
  • x86
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3
Potential and wave number problem (concerning units)
  • Lindsayyyy
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Optics mirrors problem with rearview of car
  • alingy1
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An accelerated iron Ion moving through a mass spectrometer's field
  • slybuster
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1
Magnetic Flux of a partially rotating loop
  • aChordate
  • · Replies 1 ·
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Work Done by Gravity: Formula & Considerations
  • alingy1
  • · Replies 4 ·
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Mathematical approximations in Physics for angles <20 degrees
  • hyde2042
  • · Replies 6 ·
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6
Magnetic Field at the center of a square
  • aChordate
  • · Replies 12 ·
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12
Force on a Moving Charge Due to a Current-Carrying Wire
  • aChordate
  • · Replies 11 ·
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Force of one wire due to the other
  • aChordate
  • · Replies 15 ·
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Analyzing Magnetic Field of an Infinite Cylinder with Constant Magnetization
  • peripatein
  • · Replies 51 ·
2
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Mass of a particle through a magnetic field
  • aChordate
  • · Replies 7 ·
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Work done by electrostatic force. Positive or negative?
  • x86
  • · Replies 2 ·
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2
Vertical cord tension in an elevator
  • Robertoalva
  • · Replies 25 ·
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25
What is the convention for writing vector magnitudes in free body diagrams?
  • alingy1
  • · Replies 4 ·
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Relative velocity with respect to image in the mirror
  • agoogler
  • · Replies 2 ·
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How does an object start to move in a circlular path?
  • safwan.hossain
  • · Replies 5 ·
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The length of a path on a sphere (in spherical coordinates)
  • ks_wann
  • · Replies 14 ·
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14
How Does a Charge Outside a Conducting Cube Affect Its Internal Electric Field?
  • sankalpmittal
  • · Replies 10 ·
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Friction Forces, find the coefficient of kinetic friction
  • bellanella23
  • · Replies 3 ·
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3
Find the mutual inductance between the coil and the wire in two ways
  • sapz
  • · Replies 3 ·
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3
Incline with Pulley, find the mass of one block.
  • Nirupt
  • · Replies 3 ·
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3
Pushing a cabinet on a rough floor
  • judas_priest
  • · Replies 13 ·
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13
Asteroids and their total energy
  • BadSkittles
  • · Replies 1 ·
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1
Force Exerted by Roads of Length x & Separation x - Physics Problem
  • jingu
  • · Replies 35 ·
2
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How would gravity act on an object with no velocity?
  • safwan.hossain
  • · Replies 2 ·
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Simple Harmonic Oscillation Problem
  • GarrettB
  • · Replies 4 ·
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How to Calculate ω in a Mechanical System
  • lussi
  • · Replies 12 ·
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Angular Momentum and Kepler's Second Law
  • Bashyboy
  • · Replies 6 ·
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Capacitor in Series and Parallel combination
  • carnot cycle
  • · Replies 10 ·
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High Frequency Versus Low Frequency
  • GGalaxy
  • · Replies 6 ·
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6