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.
What is RMS Power? Understanding Its Meaning and Importance in AC Circuits
  • · Replies 10 ·
Replies
10
Views
12K
Conservation of momentum after a collision
  • · Replies 15 ·
Replies
15
Views
4K
Static friction and kinetic friction, solve for acceleration and force.
  • · Replies 6 ·
Replies
6
Views
14K
Specific heat and heat of fusion lab questions
  • · Replies 1 ·
Replies
1
Views
2K
Help understanding centrefugal force
  • · Replies 1 ·
Replies
1
Views
2K
Newton's Three Law's on Cars, Bicycles, Objects
  • · Replies 3 ·
Replies
3
Views
7K
Problem involving hookes law and friction
  • · Replies 1 ·
Replies
1
Views
3K
Why Is the 0.7 Volts Diode Drop Used in Calculating R2 Current?
  • · Replies 6 ·
Replies
6
Views
2K
Help : Perpendicular distance of the plane
  • · Replies 4 ·
Replies
4
Views
3K
Calculating Work and Distance for a Braking Automobile
  • · Replies 1 ·
Replies
1
Views
2K
Circular Motion - Spacecraft in Orbit
  • · Replies 2 ·
Replies
2
Views
2K
Non-Uniform Circular Motion: Locomotive Rounding a Curve
  • · Replies 4 ·
Replies
4
Views
3K
Designing a Box to Catch an Unadulterated Egg at 18ft
  • · Replies 9 ·
Replies
9
Views
10K
Relative length and velocities using Lorentz transformations
  • · Replies 1 ·
Replies
1
Views
2K
Tension in an Accelerated System
  • · Replies 1 ·
Replies
1
Views
963
Calculating Force Needed to Lift Lid in Denver
  • · Replies 5 ·
Replies
5
Views
3K
How Do You Normalize the Wavefunction ψ=Ae^(-λχ)e^(-iδt)?
  • · Replies 1 ·
Replies
1
Views
2K
Finding Speed of a Mass in a Frictionless System at a Specific Time
  • · Replies 12 ·
Replies
12
Views
4K
Bicyclist coasting down hill (Newton's Laws)
  • · Replies 4 ·
Replies
4
Views
7K
How Does f-Number Influence Depth of Field in Photography?
  • · Replies 4 ·
Replies
4
Views
2K
This is more a of a theory question of the atwood and energy
  • · Replies 8 ·
Replies
8
Views
2K
P-n junction & transistors: depletion zone
  • · Replies 11 ·
Replies
11
Views
6K
Kinetic Energy and Work energy theorem
  • · Replies 10 ·
Replies
10
Views
2K
Calculating the Change in Mechanical Energy of a Car-Truck Collision
  • · Replies 5 ·
Replies
5
Views
6K
Difference between mass and volume
  • · Replies 2 ·
Replies
2
Views
2K
Why is There Acceleration Despite Newton's Third Law of Motion?
  • · Replies 5 ·
Replies
5
Views
1K
U Physics 12E 7.71 Conservation of Energy: An experimental apparatus with mass
  • · Replies 1 ·
Replies
1
Views
7K
Finding Tension in a Pulley System
  • · Replies 2 ·
Replies
2
Views
9K
Conservation of Momentum in an Inelastic Collision
  • · Replies 26 ·
Replies
26
Views
8K
Electric field, solid sphere inside hollow sphere
  • · Replies 1 ·
Replies
1
Views
5K
Angular change in velocity (momentum)
  • · Replies 4 ·
Replies
4
Views
6K
Can angles be negative in coordinate geometry?
  • · Replies 5 ·
Replies
5
Views
31K
Comparing Potentials of Multiple Charges at Varying Distances from the Origin
  • · Replies 6 ·
Replies
6
Views
2K
Calculating Mass from Centripetal Force Slope
  • · Replies 4 ·
Replies
4
Views
2K
Why Are High Energies Needed to Break Particles and Observe Fine Structure?
  • · Replies 2 ·
Replies
2
Views
2K
Calculating Velocity and Distance for a Coupled Spring-Mass System
  • · Replies 1 ·
Replies
1
Views
14K
Conservation of Angular Momentum of Cart Problem
  • · Replies 2 ·
Replies
2
Views
3K
Two blocks, a pulley, and an inclined plane.
  • · Replies 2 ·
Replies
2
Views
3K
How Does Phasor Addition Simplify Trigonometric Expressions?
  • · Replies 3 ·
Replies
3
Views
4K
Radiation heat exchange between two surfaces.
  • · Replies 1 ·
Replies
1
Views
5K
Accelerating Blocks: Calculating Frictional Force
  • · Replies 1 ·
Replies
1
Views
7K
Calculating Water Flow Duration in Cylinder Reservoir
  • · Replies 3 ·
Replies
3
Views
2K
How Do Kirchhoff's Rules Determine Currents in a Dual Battery Circuit?
  • · Replies 16 ·
Replies
16
Views
5K
The Inequality for e in Newton's Law of Restitution Collision?
  • · Replies 1 ·
Replies
1
Views
2K
How Do You Calculate the Correct Spring Constant for Stopping a Car?
  • · Replies 10 ·
Replies
10
Views
4K
Why doesn't a velocity vs time graph always pass through the origin?
  • · Replies 5 ·
Replies
5
Views
19K
Acceleration of a Rolling Cylinder
  • · Replies 18 ·
Replies
18
Views
5K
Trouble understanding Symmetries
  • · Replies 1 ·
Replies
1
Views
2K
Energy Cost of Stair Climbing for Average-Sized Individuals
  • · Replies 1 ·
Replies
1
Views
3K
Can a Pedestrian Running at 6 m/s Catch a Bus Accelerating from a Stop?
  • · Replies 10 ·
Replies
10
Views
16K
A circulating charged particle under a magnetic field
  • · Replies 2 ·
Replies
2
Views
4K
How Long Does It Take for an Electron to Travel Through a Silicon Block?
  • · Replies 1 ·
Replies
1
Views
2K
Car travelling around a banked corner with friction
  • · Replies 6 ·
Replies
6
Views
3K
A mass hung from two attached springs
  • · Replies 2 ·
Replies
2
Views
9K
Calculate Change in Velocity of Flatcar When Man Runs Opposite Direction
  • · Replies 1 ·
Replies
1
Views
4K
Can you guys help check my answers? - balanced force
  • · Replies 1 ·
Replies
1
Views
7K
Phase difference between the two waves
  • · Replies 1 ·
Replies
1
Views
3K
Using Optics To Make An Aircraft Invisible
  • · Replies 2 ·
Replies
2
Views
2K
Finding constant velocity,final velocity and acceleration of these cars?
  • · Replies 3 ·
Replies
3
Views
5K
Problem concerning Pilot find true weights
  • · Replies 8 ·
Replies
8
Views
3K
What is the angle between these two vectors?
  • · Replies 1 ·
Replies
1
Views
12K
Traversing a Circular Arc: Solving for Time with Maximum Acceleration
  • · Replies 6 ·
Replies
6
Views
2K
P-State Lightwave: Angular Frequency & Amplitude
  • · Replies 3 ·
Replies
3
Views
7K
What Are Three Cable-Free Long Range Communication Methods?
  • · Replies 13 ·
Replies
13
Views
3K
Angle for a banked curve (friction-less surface)
  • · Replies 12 ·
Replies
12
Views
13K
Principle of triangle of forces
  • · Replies 1 ·
Replies
1
Views
8K
Question about momentum depending if the collision is elastic or not?
  • · Replies 2 ·
Replies
2
Views
1K
Simple gravitational attraction forces problem
  • · Replies 8 ·
Replies
8
Views
10K
What is the required deceleration to stop a car in a given distance and time?
  • · Replies 7 ·
Replies
7
Views
4K
1) A rope 5m is fastened to two hooks 4m apart on a horizontal
  • · Replies 4 ·
Replies
4
Views
4K
Calculate J Notation Impedance of Network w/ Capacitor & Inductor
  • · Replies 1 ·
Replies
1
Views
4K
Help with Homework Statement 1b: Elasticity & Pressure
  • · Replies 6 ·
Replies
6
Views
2K
How to Find g from the Gradient of a Distance-Time Graph?
  • · Replies 2 ·
Replies
2
Views
7K
Calculating Magnetic Field at a Point Using Biot-Savart Law
  • · Replies 2 ·
Replies
2
Views
4K
Centripetal Force with angle problem
  • · Replies 1 ·
Replies
1
Views
2K
Slightly confused regarding centripetal force, radius and frequency
  • · Replies 3 ·
Replies
3
Views
5K
How Do You Sketch a Velocity-Time Graph for Constant Velocity and Acceleration?
  • · Replies 5 ·
Replies
5
Views
2K
How to Calculate Speed in Circular Motion on a Hemisphere Surface?
  • · Replies 2 ·
Replies
2
Views
4K
Find the time of a certain velocity
  • · Replies 15 ·
Replies
15
Views
4K
Radioactivity homework question
  • · Replies 3 ·
Replies
3
Views
2K
Help w/ projecetile motion w/ angled launch problem
  • · Replies 6 ·
Replies
6
Views
2K
How Much Work Is Needed to Alter a Crate's Velocity?
  • · Replies 2 ·
Replies
2
Views
18K
Total energy of an airplane, work done against air resistance
  • · Replies 3 ·
Replies
3
Views
3K
Weight of an Astronaut Between Two Stars - Newton's Laws of Motion Explained
  • · Replies 1 ·
Replies
1
Views
3K
Quantum mechanics, harmonic oscillator
  • · Replies 10 ·
Replies
10
Views
3K
Pilot problem dealing with weight and magnitude of force exerted on pilot's body
  • · Replies 2 ·
Replies
2
Views
4K
Did a Comet Slam Into Earth and Combine with It After Collision?
  • · Replies 4 ·
Replies
4
Views
2K
Finding Δx of a box sliding down an inclined plane using Work theory.
  • · Replies 4 ·
Replies
4
Views
6K
Equilibrium cylinder and plank on incline
  • · Replies 2 ·
Replies
2
Views
3K
How Long Should Pilots Fire Engines for Safe Re-entry?
  • · Replies 4 ·
Replies
4
Views
3K
Calculating final velocity of an object on an inclined plane
  • · Replies 8 ·
Replies
8
Views
38K
Calculating impedance, real and imag part
  • · Replies 1 ·
Replies
1
Views
2K
Just finished my first Physics exam, Bus braking Problem
  • · Replies 2 ·
Replies
2
Views
2K
Newton's law of cooling to find time of death
  • · Replies 2 ·
Replies
2
Views
7K
Why does a glass topple when the cloth is pulled from under it
  • · Replies 2 ·
Replies
2
Views
2K
A 9.0 killogram mass and a 3.0 kg mass are at rest on a frictionless
  • · Replies 10 ·
Replies
10
Views
2K
How to Determine Force Magnitude in a Static Friction Problem?
  • · Replies 16 ·
Replies
16
Views
7K
Solving a Complex Circuit: Loop Analysis & Node Analysis
  • · Replies 13 ·
Replies
13
Views
6K
Find The Max Velocity (using coefficient of friction)
  • · Replies 5 ·
Replies
5
Views
3K
Horse Trailer and Center of Mass
  • · Replies 1 ·
Replies
1
Views
3K