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.
Solving Mass-Acceleration Relationships for Objects Connected with Pulleys
  • Geminiforce
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How Is the Resultant Force on a Car Calculated?
  • anteaters
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Wavelength, temperature in transition
  • akance
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How Does Throwing a Snowball Affect an Ice Skater's Movement?
  • MBURNS001
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Forces Acting on a Ball: Identifying the Unknowns
  • kristibella
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Physics Experiment Help - Capacitors
  • erik006
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Scientific Revolution: Newtonian Physics - gravity waiting to be discovered?
  • Kristie29
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Sol'n: Find Force P to Balance Weight of Blocks A and B
  • Melawrghk
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Circular motion/gravitational force implied
  • fluidistic
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Power needed to keep velocity of conveyor belt constant
  • diablo2121
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Tension Equal in Pulley System w/ 2 Strings
  • fk378
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Find Center of Mass of Dropped Stones
  • musicfairy
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What is the Velocity of the Meteor?
  • teababy
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Thermodynamic Application Isothermal Work
  • latitude
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Normal Force Problem: Calculating Magnitudes
  • johnson.3131
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Electric force and free electrons
  • chem1
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Elastic Collision and max height on an Incline
  • closer
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What Is the Other Force Acting on the Object?
  • anteaters
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Proving Acceleration of a Cart on an Inclined Plane | Physics Lab Homework Help
  • choyphin
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How Much Does a Guitar String Stretch Under Tension?
  • Jaklynn429
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What is the Speed of the Center of Mass of Two Moving Particles?
  • JJones_86
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Solving the Firework Exploding Homework Statement
  • JJones_86
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Prove that: kinematics/ projectile problem
  • jlk
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Resonance in Electrical Circuit
  • just.karl
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What is the net impulse and average force on a ball caught in hand?
  • snoopygal327
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Difficult Force Problem with changing angle ( )
  • DJWise
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Finding accelration with forces?
  • papi
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How to Calculate Contact Force Between Boxes in Physics?
  • papi
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Torque Equilibrium: Solving f=ma and T=rf
  • rphung
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What Angle Causes an Ice Cube to Detach from a Spherical Bowl?
  • aimslin22
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Simple Harmonic Motion Problem(pendulum)
  • JSmith89
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Calculate Angular Velocity after Star's Diameter Decrease
  • Naldo6
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Calculating the Center of Mass for a CO Molecule
  • Naldo6
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Calculating Velocity of a Wheel at the Top Using Acceleration and Time
  • Naldo6
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Find the expression for the frequency emitted if the source
  • grapejellypie
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How Much Torque Does an Electric Motor Develop at 3000 RPM?
  • irun4edmund
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Cannot Lift Piano: Force or Work Not Enough
  • keemosabi
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How far behind is the automobile when it reaches a speed of 38.9 m/s?
  • bigzee20
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Finding the friction coefficient?
  • papi
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Partially Emptying a Tank Containing an Ideal Gas
  • orangbulu
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Solve Ball Torque Problem: 5.80 kg and 8.50 kg Balls
  • irun4edmund
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Conservation of Angular Momentum in Collision with Rotations
  • maniacp08
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Some basic electric potential questions
  • kyoko
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Finding the force (complicated)?
  • papi
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Weight above the surface of the Earth
  • Sligh
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Induced current through a resistor - with variable resistor and two coils
  • jcvince17
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How Does Cutting a Spring Affect Its Angular Frequency?
  • JSmith89
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How High Does a Basketball Bounce After Losing 20% Energy?
  • aleferesco
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Max Accel & Force for Mass Block & Cart
  • PhysicslyDSBL
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Calculating Time for Overtaking in a Race
  • bigzee20
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Free Fall and gravitational acceleration
  • tgilli
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Interpreting this wave funtion
  • RJS
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Graphing Wavelength vs Inverse freq. or Period
  • PSEYE
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Finding Force of friction without having coefficient or normal?
  • DDRchick
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What Are the Physics Behind a Girl Pulling a Sled on Ice?
  • hansel13
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Tipping something given its center of mass? My LAST homework problem
  • Jaklynn429
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Calculating Projectile Motion: Solving for Distance and Height
  • physics_geek
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How Is the Force of Sunlight Calculated on a Building's Roof?
  • TLeo198
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Maximum Weight for Stationary System with Static Friction
  • burg25
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Capacitor, Dielectrics and height movement
  • TFM
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How Do I Solve These Physics Problems for My Exam Tomorrow?
  • B Serious
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How do the blocks of power have the same kinetic energy?
  • soupastupid
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Hang time, range, maximum height
  • itsmarasilly
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Blocks on Floor - Tension between blocks
  • PhysicslyDSBL
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Force and Motion Electron Problem
  • hansel13
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Problem: Work done by a Variable Force
  • lucky_star
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How Is Acceleration Calculated When a Car Changes Direction But Not Speed?
  • possum30540
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What Is the Moment of Inertia and Frictional Torque of a Rotating Wheel?
  • maniacp08
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What Is the Resultant Speed After Two Birds Collide?
  • drewdiddy
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Time & Velocity Homework: Police Car Overtake Speeder
  • bigzee20
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How Is Power Related to Aerodynamic Drag in Cycling?
  • shimizua
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Tension with a with a massless rope
  • kbka
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What Do Others Think About Determinism?
  • Steph191290
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Calculating Position from Acc. Time Graph
  • bigzee20
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Power Dissipation: Understanding Equations & Solutions
  • soupastupid
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Calculating Landing Distance on an Aircraft Carrier
  • bigzee20
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Speedboat Acceleration Question
  • aquapod17
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How Do You Calculate the Moment of Inertia of a Cone?
  • ehilge
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What is the magnitudue of the force acted on the ball
  • knelson
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Rotating Record Frequency Calculation
  • marnold1987
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Confusion regarding electrical power
  • nokia8650
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What is the relationship between thrust and density in a half-submerged object?
  • nokia8650
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Momentum and the Conservation Laws
  • closer
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Calculate the rope tensions (please tell me if I've made a mistake)
  • ScullyX51
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How Do Tensions Differ in a System with a Monkey and Bananas on a Rope?
  • ScullyX51
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What is the Force Ranking in an Elevator with Stacked Blocks?
  • iluvphys
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Displacement of a point on a string given t and x
  • beccaka2003
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Calorie Intake Needed for Tour Riders to Maintain Weight
  • shimizua
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Just getting into friction kinetic and static
  • blakester
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How much work is done on the box by person pulling?
  • Bones
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How Far Must a Diver Stand on a Diving Board to Exert a Torque of 1110 m*N?
  • Naldo6
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Distance CO Molecule: Center of Mass From Carbon Atom
  • Naldo6
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Quick question about circular motion
  • mjolnir80
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Centripetal and centrifual force reactions on objects?
  • TitonV
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Calculating Work Conceptual Question
  • BugsSport
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How Do You Calculate Maximum Angular Velocity of a Rotating Ring?
  • maniacp08
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Angular velocity and regular velocity
  • asi123
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Two Blocks | Same Kinetic Energy (KE) Calculation
  • soupastupid
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How Do Ships A and B Move Relative to Each Other?
  • Jharr94
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Applications of Newtons Law Question 1
  • noasherelol
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