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.
How Much Force to Slide a 10 kg Box with Friction?
  • lxared
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Torsion - Coupling connecting two shafts
  • Tom McCurdy
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1
[Collision with 2 Clay Balls] [Inelastic Collisions] [Help Finding Theta]
  • Nulligan
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Ball falling on to parabolic track
  • jemstone
  • · Replies 3 ·
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3
Effect of Two Springs on an Object
  • jemstone
  • · Replies 3 ·
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3
Solving Rifle Recoil & Force: A 30-06 Hunting Rifle Case Study
  • redhot209
  • · Replies 1 ·
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Projectile motion radar antenna
  • physics0926
  • · Replies 1 ·
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1
Projectile Motion of golf chip shot
  • bkoiskewl1
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3
Effect of Dielectric Material on Electric Field in a Parallel Plate Capacitor
  • Sheneron
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6
Work-Energy Theorem: Calculating Work Done on a Sliding Block
  • kmikias
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5
Calculating Force for Uniform Deceleration in a Mass-Force Relationship
  • redhot209
  • · Replies 4 ·
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4
How Much Force to Move a 150 kg Crate on Different Friction Surfaces?
  • bmandrade
  • · Replies 9 ·
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9
Solving Two Veggie Patties Physics Problem
  • vpv
  • · Replies 5 ·
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5
Calculating Power of DC-3 Airplane Takeoff: 9500 kg Mass, 110 km/h Speed
  • nm12182
  • · Replies 1 ·
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1
What is the Work Done on a Carton on an Inclined Ramp?
  • SuPaFly43218
  • · Replies 3 ·
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3
Twin Paradox and Time Travel (Special Relativity)
  • scurry18
  • · Replies 5 ·
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5
Finding the Critical Velocity for Special Relativity Effects
  • scurry18
  • · Replies 4 ·
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4
Gaussian Cylinder Electric Field and Net Charge Calculation
  • Doc Z
  • · Replies 19 ·
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19
Launching from Mars - Mass & Radius of R_m
  • soupastupid
  • · Replies 3 ·
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3
Does Equal Kinetic Energy Imply Different Momenta for Cars with Varying Masses?
  • avenkat0
  • · Replies 8 ·
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8
Block colliding with movable ramp
  • ionic_scream
  • · Replies 1 ·
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1
Solving for Upward Acceleration: Using a Basic Pulley System
  • eatingblaa
  • · Replies 11 ·
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11
Braking Distance Increase Factor w/ 50% Speed Increase
  • sugarntwiligh
  • · Replies 2 ·
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2
Two blocks and a pulley homework
  • duketogo
  • · Replies 2 ·
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2
Work and Kinetic Energy problem
  • maniacp08
  • · Replies 1 ·
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1
Impulse in Inelastic Collisions
  • avenkat0
  • · Replies 13 ·
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13
How Does Wind Affect the Maximum Roundtrip Distance of a Jetliner?
  • pippintook
  • · Replies 1 ·
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1
Total induced emf at different speeds
  • cryptoguy
  • · Replies 4 ·
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4
How Does Bohr's Atomic Model Address Electron Energy Loss?
  • Ahsan Khan
  • · Replies 2 ·
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2
Magnetic Moment, Electron Spin, Energy
  • roeb
  • · Replies 1 ·
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1
What is the Angular Velocity of the Runner and Turntable System?
  • anubis01
  • · Replies 2 ·
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2
Tension between two accelerating forces.
  • Notyou
  • · Replies 10 ·
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10
Calculating decay constants and half-life
  • Steph191290
  • · Replies 9 ·
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9
What is the Magnitude of Frictional Force with Varying Applied Forces?
  • hansel13
  • · Replies 3 ·
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3
Calculte the Energy of 1 mole of photons - Help
  • lucky_star
  • · Replies 4 ·
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4
Solving Elliptical Orbit Homework: Comet's Semi-Major Axis & Sun Distance
  • myoplex11
  • · Replies 1 ·
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1
Biot-Savart Law (infinite filament)
  • gsan
  • · Replies 2 ·
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2
Conservation of momentum (neuclear decay)
  • avenkat0
  • · Replies 7 ·
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7
Measuring Potential Difference Across 4.5kOhm Resistor w/ Voltmeter
  • physstudent1
  • · Replies 1 ·
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1
How Did the Father Match His Son's Kinetic Energy After Speeding Up?
  • netrunnr
  • · Replies 1 ·
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1
How Do You Calculate Angular Acceleration from Initial Speed and Angle Change?
  • xregina12
  • · Replies 1 ·
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1
Calculating Normal Force on Pilot in Air Show Loop
  • myoplex11
  • · Replies 1 ·
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1
How much mechanical work was done by 2 men lifting a boat 24 times?
  • maxdaddy
  • · Replies 3 ·
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3
How Does a Mass and Spring System Behave on an Inclined Plane?
  • besenji
  • · Replies 1 ·
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1
Momentum of an explosion problem. Desperately
  • Alphonso
  • · Replies 1 ·
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1
How Do You Calculate Earth's Angular Velocity in Its Orbit?
  • ch2kb0x
  • · Replies 1 ·
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1
Finding the Coefficient of Kinetic Friction
  • besenji
  • · Replies 1 ·
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1
Is a Constant Force Always Conservative?
  • zoner7
  • · Replies 1 ·
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1
Forces and Motion, Free-body diagrams help
  • FEMA
  • · Replies 1 ·
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1
Electric potential due to line of charge
  • stickyrice581
  • · Replies 4 ·
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4
Gauss's Law to Symmetric Charge Distribution
  • magda3227
  • · Replies 6 ·
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6
Planet Motion: Calculate Star Mass
  • myoplex11
  • · Replies 1 ·
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1
Help triangle within a circle find side of triangle
  • kmiller
  • · Replies 1 ·
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1
Make a Spreadsheet for Homework: Cos & Sin Graphs
  • fk378
  • · Replies 8 ·
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8
Is a Central Force Always Conservative?
  • subwaybusker
  • · Replies 1 ·
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1
Power of Elevator: Calculating Motor Power Needed
  • blayman5
  • · Replies 1 ·
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1
Magnetic flux in a straight wire to a cylinder
  • goWlfpack
  • · Replies 3 ·
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3
How Does Earth's Magnetic Field Flux Change with Loop Orientation?
  • goWlfpack
  • · Replies 3 ·
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3
Conservation of energy involving spring and friction
  • IniquiTrance
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Thermal expansion, percent change in density problem
  • ctpengage
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2
Solving a Kinetic Energy Conceptual Question: 0.5m * v^2?
  • netrunnr
  • · Replies 5 ·
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5
Thermal Energy dissapated from brakes.
  • besenji
  • · Replies 4 ·
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4
Find the boat's speed as a function of time
  • khdani
  • · Replies 2 ·
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2
How is thermal energy affected by friction on an inclined plane?
  • mystic3
  • · Replies 5 ·
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5
Estimating Mass of the Milky Way Galaxy
  • myoplex11
  • · Replies 3 ·
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3
Calculating the Radius of a Geosynchronous Satellite Orbit Around Earth
  • aligass2004
  • · Replies 3 ·
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3
Where Will a Falling Particle Leave a Sphere with No Friction?
  • fluidistic
  • · Replies 5 ·
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5
How Is Tension Calculated in a Pulley System with Unequal Masses?
  • Notyou
  • · Replies 1 ·
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Dimensional analysis to determine unknown exponents
  • Vasili
  • · Replies 1 ·
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How to build a cart that moves from suspended mass
  • DylanMX
  • · Replies 3 ·
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3
Which Energy Levels in Hydrogen Produce the Red Line?
  • catkin
  • · Replies 5 ·
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5
Mass of a ball with different density
  • asi123
  • · Replies 6 ·
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6
Understanding the Red-Boxed Formula
  • gsan
  • · Replies 20 ·
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20
Solve the equation vf = vi + at for acceleration
  • joykizz_16
  • · Replies 3 ·
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3
Calculating Moment of Inertia at Point A
  • asi123
  • · Replies 8 ·
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8
Minimum Force to Lift a Cylinder: Explained
  • asi123
  • · Replies 2 ·
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2
Refraction Problem: Find Angles with Triangles
  • khoais
  • · Replies 5 ·
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5
Surface charge density of Styrofoam
  • Gear300
  • · Replies 6 ·
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6
Block held against wall, force problem
  • azure kitsune
  • · Replies 3 ·
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3
Circular Motion Problem: Solving for Revolutions with Constant Acceleration
  • mjolnir80
  • · Replies 2 ·
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Is Your Thermodynamics Exam Coming Up?
  • PeterSK
  • · Replies 2 ·
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2
What Is the Magnetic Force Per Unit Length on a Wire in a Bundle?
  • Ithryndil
  • · Replies 2 ·
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Deleted Data: What You Need to Know
  • wolffbite
  • · Replies 1 ·
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1
Calculating Orbital Velocity and Probe Velocity in a Hohmann Transfer to Neptune
  • garyman
  • · Replies 1 ·
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Problem using conservation of angular momentum
  • john001
  • · Replies 2 ·
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Calculating the motion of binary stars
  • hragsarkissia
  • · Replies 2 ·
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2
How Do You Delete an Accidental Forum Post?
  • chem_is_lovex
  • · Replies 3 ·
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3
Inclined plane car out of gas problem
  • angeljunti
  • · Replies 9 ·
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9
Is this ok with Polar coordinates?
  • Azorspace
  • · Replies 2 ·
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Calculating Mechanical Energy Change of 1100kg Car
  • uno
  • · Replies 3 ·
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Calculating the coefficient of kinetic friction homework
  • Lokhtar
  • · Replies 7 ·
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7
Magnitude and Direction of Electric Field at the origin? Please help
  • SilverGirl
  • · Replies 14 ·
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14
Electric/Magnetic Field Technologies
  • temaire
  • · Replies 1 ·
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1
HELP. exam tomorrow. practice midterm questions
  • taproot729o6
  • · Replies 1 ·
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1
Where is the center of mass of the slab
  • ganondorf29
  • · Replies 2 ·
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2
2 people in a canoe, switch places, canoe moves, find mass of one person
  • musicfairy
  • · Replies 8 ·
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Little Nellie Newtons Force Problems
  • jawo3
  • · Replies 4 ·
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4
Electromagnetic Spectrum Problem Help
  • TLeo198
  • · Replies 3 ·
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Insulator/Conductor Question with picture
  • swooshfactory
  • · Replies 2 ·
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Block hits block with spring. COE and COM
  • mpaandaa
  • · Replies 1 ·
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1