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.
Physics 3-D Force Vector Question
  • AIDB
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What is the average speed of a car on a trip with varying speeds and distances?
  • Medgirl314
  • · Replies 27 ·
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3K
2D Moments confusion, does d have to be perpendicular?
  • Willjeezy
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17
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3K
How high does a block on a ramp go, with friction?
  • oneamp
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12
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8K
One dimension kinematics, what am I doing wrong?
  • hey123a
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8
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How to increase 3-Dimensional thinking?
  • Princu
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10
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What Is the Frequency of Combined Motion?
  • bfusco
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When can instantaneous velocity equal average velocity during a 10-second trip?
  • sammiyahc0
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6
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What is the electric field at a point midway between two point charges?
  • spark693
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2
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Flux across a plane with varying electric field
  • oreosama
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Calculating Coefficient of Kinetic Friction for a Hockey Puck
  • Psyguy22
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Equilibrium of a Rod Problem: Find Minimum Distance x
  • burnst14
  • · Replies 31 ·
2
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Particle moves in one dimension given potential funct find maximum x
  • oddjobmj
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4
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Uncertainty principle for electron in nucleus
  • Dassinia
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2
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Electric force charges homework
  • danish1991
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Solving LC-Circuit Problem: Q & I as Func. of Time
  • gralla55
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4
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Acceleration of an electron in both a magnetic and an electric field
  • lynkyra
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3
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Determine the magnitudes and directions of the currents in each R's.
  • NasuSama
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2
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Buoyancy of a piece of wood floating in water
  • Woolyabyss
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5
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8K
Solving Grating Resolution Homework for Skyscraper Distance
  • Gee Wiz
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1
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4K
Magnitude of the electric force?
  • danish1991
  • · Replies 3 ·
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3
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2K
Kinematics of a Home Run: What is the Initial Speed and Components at the Fence?
  • Jabababa
  • · Replies 7 ·
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7
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5K
Determine the magnitude of the minimum acceleration
  • tristanmagnum
  • · Replies 4 ·
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4
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7K
Throwing a ball and calculating the speed
  • PhyIsOhSoHard
  • · Replies 9 ·
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9
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4K
What is the normal force between two stacked boxes?
  • tristanmagnum
  • · Replies 6 ·
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6
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3K
Calculating Impulse of Normal Force in a Frictional System with Thrown Ball
  • user5
  • · Replies 8 ·
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8
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5K
What is the Average Force During a Collision?
  • FrostyMan
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1
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2K
A particle is moving in a circle
  • mrknowknow
  • · Replies 10 ·
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10
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2K
Accelerated Motion in [2]- initial speed and launch angle
  • hsphysics2
  • · Replies 1 ·
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1
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2K
The angular velocity of a process control motor is (21−(1/2t^2)) rad/s
  • zapzapper
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4
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14K
Electric field at a radius outside of a hollow cylinder w/ a rod in it
  • PhizKid
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5K
Magnitude and direction of electric field with nonconducting sheets
  • cwbullivant
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1
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Ratio of charges in thomson expt
  • ananthu
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1
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Heat Capacity and Temperature Change
  • Qube
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4
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2K
How old is Jacob when Maggie returns from her trip to Barnard's Star?
  • renegade05
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5
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2K
Problem related to pulley system and velocity
  • hasnainzeenwa
  • · Replies 17 ·
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17
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5K
How Much Farther Would a Car Skid on Wet Concrete?
  • marmadmit
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2
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3K
How to find Mass of an object when given Force and an angle
  • physics120bsu
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4
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8K
Pushing crates up a frictionless ramp
  • drjohn15
  • · Replies 9 ·
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9
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How Is Entropy Calculated in Different Macrostates of Einstein Solids?
  • d2x
  • · Replies 1 ·
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Solving 100W Lightbulb Filament Surface Area Problem
  • courtneywetts
  • · Replies 3 ·
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3
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3K
Two conducting cables - Gauss' Law
  • kbwelch17
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A Charged Sphere with a Cavity
  • kbwelch17
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33K
3-Pulley / 3-Weight system; Find Tension
  • oddjobmj
  • · Replies 19 ·
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13K
Determine the thickness of aluminium using γ-rays
  • garyd
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1
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How Does Gauss's Law Apply to Nonuniform Spherical Charge Distributions?
  • kbwelch17
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Group Velocity of Waves in Gas Problem
  • GreenPrint
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4
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Number of standing waves in a potential barrier
  • member 422733
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Potential at a point in a circuit
  • vadevalor
  • · Replies 10 ·
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What is the maximum mass of a rocket when its momentum and energy are optimized?
  • derrickb
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Effect of speed on horizontal displacement in projectile motion
  • darla1608
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Placement of an object and magnification
  • Violagirl
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How Do You Calculate Bullet Trajectory in Projectile Motion?
  • Sylis
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3
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How to Calculate Javelin Throw Dynamics in Projectile Motion?
  • kpadgett
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How Do You Calculate Vector Addition and Subtraction?
  • mikeyp
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Solve 2-Mass Pulley System Homework for Moving Blocks
  • dgZeyas
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Solving Human Eye Problem Homework w/o Quotes
  • Violagirl
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Express the following in the form of a Complex Number
  • Minhq604
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Pulley and cords tension physics
  • tristanmagnum
  • · Replies 18 ·
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How does variable mass affect Newton's Second Law?
  • coldblood
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Find Equivalent Capacitance for Circuit with Five Capacitors | Homework Question
  • fredrogers3
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4
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4K
I'm not sure what my teacher means by resolution limit?
  • Astronomer1
  • · Replies 3 ·
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3
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2K
Can someone me start this problem?
  • courtneywetts
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1
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Find Flux Through Cube & Sphere
  • dpa
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3
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2K
Calculating Momentum Change in a Ball-Wall Collision: 100g Mass & 1 m/s Velocity
  • Matejxx1
  • · Replies 11 ·
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11
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Poisson distribution & exponential decay
  • cjurban
  • · Replies 11 ·
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11
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4K
Can someone please check my homework on fluid dynamics?
  • MelissaJL
  • · Replies 11 ·
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11
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3K
Rotating cylinder on inclined surface
  • user5
  • · Replies 11 ·
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11
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3K
Can This Circuit Be Simplified Using Series and Parallel Definitions?
  • irivce
  • · Replies 13 ·
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13
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3K
Equivalent resistance of simple circuit
  • nil1996
  • · Replies 4 ·
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4
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2K
Lasing experiment and the measurement of intensity
  • AlexCdeP
  • · Replies 4 ·
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4
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2K
Displacement as Function of Time Graph Question
  • physicsnobrain
  • · Replies 73 ·
3
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12K
Calculating Image Position and Height Using Two Lenses?
  • CalebtheCoward
  • · Replies 5 ·
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How to relate force to the z-axis
  • AlaskanPow
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How long will it take for Sam to catch up to John?
  • harujina
  • · Replies 16 ·
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Electric Potential, and Potential Difference
  • Baumer8993
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Find the maximum speed of the elevato
  • postfan
  • · Replies 1 ·
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The velocity of transverse waves on a string
  • Nikles
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Finding the angle given positive x component and negative y component
  • hey123a
  • · Replies 5 ·
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Finding Electric Field of Exponential Charge Distribution
  • rodriguez1gv
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2K
Solve Sphere Charge: Find Electric Field 2.5m from Center
  • stumpoman
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Coulomb's Law And Electric Field between 2 Parallel Plates
  • Yosty22
  • · Replies 2 ·
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2
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What Was the Initial Speed of the Bicycle Going Downhill?
  • harujina
  • · Replies 5 ·
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Solve Kinematics Problems Before Wednesday
  • PandaBunny
  • · Replies 4 ·
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4
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Initial Velocity: Kinemetic Equations | When is 0 m/s OK?
  • Sylis
  • · Replies 2 ·
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2
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4K
How Many 1W Bulbs Can I Use with 10.2W Power Source?
  • Ezio3.1415
  • · Replies 3 ·
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2K
What is the velocity of a 90kg astronaut traveling in outer space?
  • eddiedowen
  • · Replies 5 ·
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Determining the maximum number of minority electrons in semiconductor
  • Turion
  • · Replies 3 ·
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3
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Trying to find displacement using velocity and acceleration
  • mrsconfused
  • · Replies 1 ·
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1
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Total charge from charge density (spherical coordinates)
  • bfusco
  • · Replies 4 ·
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4
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What is the approximate uncertainty in the area of a circle
  • eddiedowen
  • · Replies 4 ·
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4
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Finding the resultant of two vectors
  • eddiedowen
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Find the time required for an airplane flight
  • eddiedowen
  • · Replies 4 ·
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4
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2K
What is the magnitude of the average force required to stop a
  • eddiedowen
  • · Replies 1 ·
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1
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2K
Uniform distribution of charge on a plane and on a bar: conditions to
  • bznm
  • · Replies 1 ·
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1
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2K
Aircraft runway question - Acceleration, Time and Final Velocity
  • Molly1235
  • · Replies 10 ·
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10
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4K
Places electric potential is zero when 2 charges
  • JustStudying
  • · Replies 5 ·
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5
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3K
Calculate Acceleration of Automobile at t = 4s
  • davev
  • · Replies 3 ·
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3
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4K
Does Time Dilation Affect Daily Airline Travel?
  • issacnewton
  • · Replies 10 ·
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Solve 1D Relative Motion Homework: Ball Thrown, Elevator, Tennis & Baseballs
  • shizaep
  • · Replies 4 ·
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4
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4K