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.
Newton's Laws: Sharp vs. Dull Knives
  • tornzaer
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Findin buckets' tension when there are two strings n two buckets
  • Natali
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1
How Does a Pulley System Affect the Force Exerted by a Table on a Box?
  • Natali
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1
Momentum - Baseball Homework: Average Force, Direction
  • tiggrulz13
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7
Block sliding down an inclined plain with gravity
  • mcnegron90
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1
Lens and Focal Length Practice Problems
  • Suavez
  • · Replies 9 ·
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9
Tennis Ball Drop II: Find Force Exerted on Floor
  • PhysicslyDSBL
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2
Calculate the Pressures of H2 and He: Are answers correct?
  • blackjack18
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1
Calculate Collector Current w/ Emitter @ 100mA - Transistor Switch
  • Jason7fd
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5
Two Blocks with rope and Pulley on Inclined Plane
  • Dahaka14
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3
Work Energy Theorem Loop-The-Loop problem
  • Awwnutz
  • · Replies 15 ·
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15
Bullet shot into pendulum - conservation of energy
  • itryphysics
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2
Calculating Vehicle Deceleration: Time & Distance
  • ajayespinoza
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1
MOCO Homework: Determine Avg Velocity
  • ajayespinoza
  • · Replies 1 ·
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1
Block, Ramp, Friction, and Spring
  • r34racer01
  • · Replies 7 ·
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7
Why Does the Scale Show 76 kg in the Elevator?
  • drewdiddy
  • · Replies 1 ·
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1
UPS man pushes boxes up a ramp problem
  • egrus8
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1
Pressure and Density: Force Increase on Eardrum in 10-Story Building
  • w11205
  • · Replies 1 ·
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1
Truck and car collide, calculate magnitude of force on car from the truck
  • evan b
  • · Replies 1 ·
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1
Block, Cart, and Pulley Question
  • r34racer01
  • · Replies 12 ·
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12
Calculate Coefficient of Sliding Friction for Icy Road | 11m/s Car Braking
  • halo9909
  • · Replies 1 ·
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1
Deriving velocty with drag equation
  • M4573R
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1
Projectile and acceleration of gravity
  • armoredfury16
  • · Replies 1 ·
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1
Relative Velocity of a Helicopter
  • vsharma88
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1
Finding spring compression using PE
  • emilykorth
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1
Kinematics Equation: Get Position from Speed & Angle
  • jartg
  • · Replies 2 ·
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2
Ideal Gas Law Question: Calculating Final Balloon Volume at High Altitude
  • blackjack18
  • · Replies 1 ·
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1
Kinetic Energy Of an rotating object
  • Duely Cack
  • · Replies 3 ·
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3
Gravity 315km from Earth's Surface
  • shimizua
  • · Replies 10 ·
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10
Finding Acceleration in two Force problems
  • jllorens
  • · Replies 5 ·
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5
Calculate Force of Inclined Surface: 0.156kg at 55°
  • xmflea
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1
Solving Relative Speed and Flashes in S' Frame
  • Oerg
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2
Maximum Angle of Incidence for Glass-Water Boundary?
  • Suavez
  • · Replies 6 ·
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6
What Torque is Needed to Accelerate a Phonograph Album?
  • Duely Cack
  • · Replies 3 ·
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3
Block sliding down ramp, energy problem
  • Chrisleo13
  • · Replies 8 ·
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8
Finding Acceleration from Friction Coefficient and Force Applied
  • ChrisMihm31
  • · Replies 6 ·
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6
What is the Resultant Gravitational Force on the 8 kg Mass?
  • dablondeemu
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Solving Momentum and Kinetic Energy Relations
  • Garen
  • · Replies 3 ·
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3
Kinetic energy in rotating objects.
  • Duely Cack
  • · Replies 1 ·
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1
Gas Law Problems: Calculating Volume of 2.0g He at 25°C & 775 mm Pressure
  • blackjack18
  • · Replies 7 ·
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7
How Does Quantized Energy Affect Oscillation Amplitude?
  • Quelsita
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1
Volume of 2 mol N2 @ 0°C & 1 atm: 11.2 L
  • blackjack18
  • · Replies 17 ·
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17
Help in Motion in Two Dimensions (Physics)
  • Libos
  • · Replies 2 ·
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2
Moment of Inertia of a Sphere problem
  • Frillth
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4
How to calculate the time for one revolution in circular motion?
  • MRD
  • · Replies 2 ·
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2
Satellite. calculate radius of orbit
  • evan b
  • · Replies 1 ·
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1
How Long to Decelerate in Water with Drag Force?
  • Cmur
  • · Replies 2 ·
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2
Solving a Difficult Projectile Motion Problem: How Far is the Diagonal Distance?
  • Jessicaelleig
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3
Calculating Work and Potential Energy in a Vertical Circle
  • Almoore01
  • · Replies 6 ·
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6
How Do You Calculate Acceleration with Friction Involved?
  • halo9909
  • · Replies 3 ·
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3
Solve Tennis Ball Drop: 0.5kg at 5.6m Height
  • PhysicslyDSBL
  • · Replies 6 ·
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6
Tangential Speed at the Equator and Beyond
  • 7starmantis
  • · Replies 16 ·
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16
What is the Magnitude of Acceleration in a Frictionless Equation?
  • shimizua
  • · Replies 4 ·
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4
Small conversion of units question
  • Inertialforce
  • · Replies 1 ·
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Calculate Friction Force + Coefficient
  • halo9909
  • · Replies 12 ·
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12
Coefficient of kinetic friction and Energy
  • Leid_X09
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Finding the Angle for Safe Max Speed on Unbanked Curve
  • aimslin22
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Calculating Exhaust Gas Speed for a 4200kg Rocket Launch
  • pbumper1
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4
Gauss's Law Problem: Electric Field Inside a Charged Cylinder
  • bcjochim07
  • · Replies 2 ·
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2
Calculating an Astronaut's Weight on Planet X
  • shimizua
  • · Replies 7 ·
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7
Box with mass attached to spring and board
  • 12boone
  • · Replies 3 ·
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3
Physics Problem: Determining Applied and Normal Forces on a Vertical Window
  • piper210_355
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Calulate Acceleration from Friction
  • halo9909
  • · Replies 2 ·
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Car Acceleration homework questions
  • aquapod17
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2
Resistance and Temperature(isn't this right?)
  • Tekmachine
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3
Force on a Particle in a B-field
  • Jan42
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Finding work done on object with a chnaging force
  • emilykorth
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1
Acceleration and Deacceleration
  • pippintook
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1
Does Mass of Cart Affect Spring Extension?
  • kay123
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How do i solve this physics problem that contains vectors
  • baseball2233
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1
How Does a Tungsten Filament's Size Affect Its Radiated Power?
  • Quelsita
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4
Work required to assemble charged particles
  • SilverGirl
  • · Replies 4 ·
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4
Daredevil motorcycle max height
  • Leid_X09
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1
Projectile Motion Problem: Determining Height Using Equations
  • jumbogala
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2
Rotation caused by friction on a sphere
  • cognaq
  • · Replies 3 ·
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3
Finding average power for an object being vertically lifted
  • emilykorth
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2
Calculating Speed and Height of a Thrown Ball
  • 12boone
  • · Replies 2 ·
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2
Motion under a constant force (relativity-related)
  • nastassja
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Calculate the orbital period of a spacecraft around the moon
  • pinkerpikachu
  • · Replies 4 ·
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4
How many balls can this juggler juggle?
  • zealot1985
  • · Replies 15 ·
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15
How Do I Solve These Complex Newtonian Mechanics Problems?
  • TripelS
  • · Replies 2 ·
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2
Cart Collision Homework: Calculate Distance Traveled After Bounce
  • MightyMan11
  • · Replies 2 ·
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2
What is the value of the spring constant k?
  • mathgirl2007
  • · Replies 3 ·
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3
Calculate Tire Angles for 2ft Diameter & 60,000 Miles
  • assirma
  • · Replies 1 ·
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Objects of equal mass, but different terminal velocities?
  • TelusPig
  • · Replies 6 ·
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6
Help with Topic on Causality and Speical relativity
  • Chaste
  • · Replies 5 ·
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5
Help Needed: Physics Homework Problem with Angle Theta & Acceleration
  • piper210_355
  • · Replies 5 ·
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5
Rocket Car: Constant Force Despite Acceleration
  • calculus_jy
  • · Replies 9 ·
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9
How do I correctly derive the formula for circular motion in a physics lab?
  • Epsillon
  • · Replies 5 ·
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5
What is the Maximum Compression of a Spring on a Frictionless Surface?
  • bkhofmann
  • · Replies 6 ·
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6
Collision question using conservation of kinetic energy
  • tippetmaster
  • · Replies 7 ·
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7
Electric Field due to a Charged Disk.
  • phoibos323
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2
Poisson Brackets Explained: Understanding the Relationship between {x,p} = 1"
  • gijoe
  • · Replies 4 ·
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Finding charge, voltage and resistance
  • Kathi201
  • · Replies 1 ·
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How Many Times Would Friends A & B Cross Each Other at the Track?
  • zealot1985
  • · Replies 4 ·
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4
Cone-shaped drain speed based on R and time
  • Rileyss123
  • · Replies 8 ·
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8
Solve Friction on Incline: 3.00kg Crate, 35.0°, 9.80m/s2
  • jstiel
  • · Replies 2 ·
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2
Circular motion - velocity of carts on a rollercoaster
  • klaw25
  • · Replies 1 ·
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Earth-Moon Center Line of Gravity
  • uno
  • · Replies 1 ·
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Conservation of energy with spring
  • fanie1031
  • · Replies 1 ·
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1