Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Calculating Tension in a Flywheel Drive Belt
- chevyboy86
- · Replies 1 ·
Help with power and force problems
- pimuni
- · Replies 1 ·
Mechanical Energy: A Q&A on I, II, III, IV
- TheHamburgler1
- · Replies 2 ·
Momentum Change & Collision Questions: Answered
- ebayunderground
- · Replies 3 ·
Solving Unknown Resistance in Series Circuit
- syang9
- · Replies 5 ·
Do Satellites with Greater Mass Have Lower Gravitational Potential Energy?
- semc
- · Replies 3 ·
Pressure of stacked bricks question
- Sabres151
- · Replies 5 ·
Maximizing Potential Energy in a Falling Mass-Spring System
- Rhaen
- · Replies 4 ·
Calculate Power to Stop 32.0kg Wheel in 15s
- bearhug
- · Replies 1 ·
Why Bellyflops Hurt: Impact on a Water Surface
- blaster0
- · Replies 3 ·
Why Is Relative Velocity in Two Dimensions So Confusing?
- app
- · Replies 8 ·
Air Resistance and Terminal Velocity
- Hazeel
- · Replies 5 ·
Speed vs Velocity: Is There a Difference?
- brncsfns5621
- · Replies 3 ·
Elastic Collision of two wood blocks
- Jacob87411
- · Replies 4 ·
Solve Tarzan's Force on Vine: 820N, 20.0m, 22.0°, 760N
- ubiquinone
- · Replies 2 ·
What is the normal force on an object being pushed into another object?
- blaster0
- · Replies 18 ·
How Do You Calculate Motion Diagram Parameters for Constant Velocity?
- rcmango
- · Replies 1 ·
What factors affect the electric field around a charged conduction sphere?
- Cairrd
- · Replies 1 ·
How to control an angle of a catapult
- 7elwa
- · Replies 4 ·
Golf ball problem (velocity, max height, hang time)
- aquaorange
- · Replies 1 ·
Calculating Time to Catch Up Using Acceleration and Velocity Graphs
- fannyzhou
- · Replies 3 ·
CIRCUITS: Three resistors, two Indep. Voltage sources, one Indep. Current source
- VinnyCee
- · Replies 5 ·
Energy conservation problem with no starting approach
- vu10758
- · Replies 2 ·
Solving for v_1, v_2, and v_3 with Nodal Analysis
- VinnyCee
- · Replies 1 ·
Finding diameter of a wire based on the current and current density.
- mkienbau
- · Replies 1 ·
Using energy conservation to find speed
- vu10758
- · Replies 6 ·
How Does Particle Decay Affect Momentum and Energy in Special Relativity?
- thenewbosco
- · Replies 3 ·
How can I build an electromagnetic motor for my grade 11 Physics class?
- doolvision
- · Replies 1 ·
Newton's Law/Mechanics Problems - Answers Found, Looking for Confirmation
- Inferiority
- · Replies 2 ·
Speed and centripetal acceleration of Earth's rotation at the equator and 30° latitude
- Fungamania
- · Replies 5 ·
Linear Momentum Question: Force Exerted in Two-Body Interactions
- krnhseya
- · Replies 4 ·
Did I Understand the 18-karat Gold Problem Wrong?
- PascalPanther
- · Replies 1 ·
Solve Vector Problem: Hurricane Path & Distance from Grand Bahama
- Malicious
- · Replies 2 ·
Max Height of m1 After Elastic Collision on Frictionless Track
- chevyboy86
- · Replies 3 ·
How Do I Find the Location of City C Relative to the Starting Point?
- Kildars
- · Replies 4 ·
Help with qualitatively graphing velocity from a postion time graph
- N. Thomas
- · Replies 1 ·
Calculating Kinetic Energy for a Swinging Wrecking Ball
- Zeitgeist
- · Replies 2 ·
Find Velocity Components of Exploding Ball
- mikefitz
- · Replies 4 ·
How Is the Horizontal Distance Calculated When a Stone Drops on a Moving Log?
- eureka360
- · Replies 5 ·
With what speed does the projectile leave the barrel
- BunDa4Th
- · Replies 5 ·
Conservation of Momentum in Two Dimensions involving a barge collision
- physics newb
- · Replies 2 ·
Help With A Concept on Work: Should be Easy
- cheechnchong
- · Replies 3 ·
Struggling with Projectile Motion Problems?
- shellz178
- · Replies 5 ·
The angle between two horizontal forces?
- zcm5000
- · Replies 7 ·
Physics Help: Raindrop Mass & Styrofoam Acceleration Problems
- muna580
- · Replies 3 ·
Calculate Marble Velocity at Angle Theta in a Smooth Pipe
- go2cnavy
- · Replies 5 ·
Calculating Spring Stretch in Series: 2.8 N/cm and 6 N/cm
- muna580
- · Replies 2 ·
Strings and Pulleys - Find the energy
- parwana
- · Replies 4 ·
Finding velocities after elastic collision without knowing mass
- mikefitz
- · Replies 5 ·
Calculating Charge on a Sphere Given Radius & Potential
- BMcN
- · Replies 1 ·
A chain sliding down an incline
- Cronomius
- · Replies 25 ·
Time at a certain reference line
- bearhug
- · Replies 1 ·
What is the role of time as the fourth dimension in scientific theories?
- semc
- · Replies 2 ·
A freight train has a mass of 4.5*10^7 kg
- Fanjoni
- · Replies 2 ·
What is the minimum initial speed needed to pass the puck to a teammate?
- mmiller39
- · Replies 3 ·
Angular acceleration spin-dry cycle
- brncsfns5621
- · Replies 1 ·
How Much Work is Required to Stop a Rotating Wheel in 15.0s?
- bearhug
- · Replies 3 ·
What is the Moment of Inertia of a Cylinder with a Mass Hanging from a Cord?
- John O' Meara
- · Replies 5 ·
How Much Work and Power Are Needed in These Friction and Incline Problems?
- needhelp83
- · Replies 2 ·
Why is initial velocity confusing during free fall?
- moomoocow
- · Replies 5 ·
How do you relate work to the problem of a pendulum with a constant force?
- feelau
- · Replies 8 ·
Why Do Roller Coasters Have Oval Loops?
- dragos
- · Replies 2 ·
Newton's Laws Question I don't understand this
- Psing05
- · Replies 12 ·
Coefficient of kinetic friction and pulling force
- eureka360
- · Replies 1 ·
What Angle Causes a Skier to Go Airborne on a Circular Slope?
- Mbaboy
- · Replies 12 ·
Are My Buoyant Force Calculations Correct?
- chuy
- · Replies 12 ·
Question regarding paper 5 ocr physics Click this
- sl3py87
- · Replies 3 ·
How Do I Solve for i2 Using KVL and KCL in Circuit Analysis?
- VinnyCee
- · Replies 7 ·
A few problems on MOTION IN ONE DIMENSION
- app
- · Replies 5 ·
How Do You Calculate the Launch Speed of a Ball in a Pinball Machine?
- Touchme
- · Replies 5 ·
Tension in the coupling between the locomotive and the first car
- ownedbyphysics
- · Replies 5 ·
Gravitational Interaction Between Two Orbits
- needhelp83
- · Replies 3 ·
Colliding Spheres Homework Problem - Find Answer in m/s
- mustangguy289
- · Replies 3 ·
Help Need help with an Atwood machine problem.
- Tyranicus
- · Replies 3 ·
Man Lifts 15kg Bucket from Well: Calculating Depth
- parwana
- · Replies 3 ·
An 1520 kg car is moving to the right at a constant velocity of 2.94 m/s.
- Fanjoni
- · Replies 2 ·
Find the friction force impeding its motion.
- nickrace09
- · Replies 2 ·
Solving Friction Problems: Calculating Work
- needhelp83
- · Replies 3 ·
Solving a Vector Problem using the Cosine Rule
- junior_J
- · Replies 10 ·
What is the impulse delivered by a bat to a baseball after contact?
- map7s
- · Replies 3 ·
Work? maybe just kinematic ( I don't even know what it is)
- Kalie
- · Replies 1 ·
I to solve a problem with bunjee jumping
- trunks21
- · Replies 3 ·
Finding the Masses of Two Objects Based on their Momentum and Velocity Vectors
- map7s
- · Replies 2 ·
How Do You Calculate Forces in Centripetal Motion Problems?
- Stephanie
- · Replies 2 ·
Vectors Graphically ( Picture Included )
- rogerthat
- · Replies 2 ·
Which Electromagnetic Wave Has the Lowest Frequency?
- luice
- · Replies 3 ·
Potential Difference between two points in battery
- mb85
- · Replies 2 ·
Uniform motion earth's orbit question.
- rcmango
- · Replies 1 ·
What Factors Determine the Speed of the Second Block in This Physics Problem?
- rbanerjee23
- · Replies 1 ·
Force on a Rolling Sphere: 2.4x10^-3 N
- John O' Meara
- · Replies 7 ·
How Does Earth's Rotation Affect the Deflection Angle of a Plumb Bob?
- Dorothy Weglend
- · Replies 10 ·
How Do You Calculate Angular Speed from Revolutions Per Second?
- jjg242
- · Replies 3 ·
Understanding the Force Constants of Springs in Combination
- emilykay
- · Replies 3 ·
Kinetic/Potential energy and thrown rocks
- bananan
- · Replies 3 ·
How do you guys deal with problems having only 2 variable? Good fomula sheet?
- Torec_Scrail
- · Replies 6 ·
Projectile motion of ball at wall problem
- raincheck
- · Replies 24 ·
Terminal speed and forces question
- NIZBIT
- · Replies 3 ·
Solving Centripetal Acceleration for Banked Turns
- FortyFeet
- · Replies 2 ·
Calculating Final Velocity of a Yo-Yo Dropped from 0.8 m
- Menisto
- · Replies 1 ·
How Long Does It Take for a Projectile to Hit the Ground?
- needhelp83
- · Replies 1 ·