Introductory Physics Homework Help Forum

Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.

Threads

Quarter tossed at 60° into carnival dish 2.1 m away

  • J89
  • · Replies 1 ·
Replies
1

Two masses on incline and hanging by rope - finding speed after 30 cm fall

  • ll_lordomega
  • · Replies 2 ·
Replies
2

How can I design a roller project to roll down an incline as slow as possible?

  • physicsdude17
  • · Replies 1 ·
Replies
1

How Does Gravity on Planet X Compare to Earth's?

  • J89
  • · Replies 1 ·
Replies
1

Radius of Curvature of Ion in Magnetic Field

  • Nexest
  • · Replies 1 ·
Replies
1

Changing the direction of the acceleration Vector

  • orthovector
  • · Replies 4 ·
Replies
4

Calculating Vector Force Between Charged Particles

  • Minihoudini
  • · Replies 6 ·
Replies
6

Penguin and slide. Check my answers? I want to be prepared for the test

  • zell_D
  • · Replies 6 ·
Replies
6

What is the Optimal Diameter for a 12.0 Ω Nichrome Wire at 20°C?

  • phy112
  • · Replies 4 ·
Replies
4

What is the power - the rate at which it supplies electrical energy?

  • phy112
  • · Replies 4 ·
Replies
4

Current in resistor network with 40.7 V between points a and b

  • Jnblose
  • · Replies 5 ·
Replies
5

Using a velocity-time graph to calculate accelerations, positions, etc.

  • ikasok
  • · Replies 4 ·
Replies
4

Solving a Physics Mystery: Initial Speed & Height of Ball

  • Bottomsouth
  • · Replies 12 ·
Replies
12

Minimum phase difference between two in-phase sources on a screen

  • noppawit
  • · Replies 5 ·
Replies
5
Replies
2

Photons - Trying to find distance

  • Nitric
  • · Replies 3 ·
Replies
3
Replies
1

How Well Do You Understand Electric Fields and Potential?

  • anthonyluvme
  • · Replies 1 ·
Replies
1

Which method is more accurate for determining peak time in data analysis?

  • marcusesses
  • · Replies 3 ·
Replies
3

How Do You Calculate Forces on Inclined Planes?

  • jarny
  • · Replies 3 ·
Replies
3

Finding launch angles for a tennis ball to hit a window 100 m away

  • db2dz
  • · Replies 14 ·
Replies
14

Determine value of the resistance of the resister

  • xswtxoj
  • · Replies 4 ·
Replies
4

Fall with Air Drag - Which Value for Velocity to Use?

  • dracayr
  • · Replies 2 ·
Replies
2

Magnitude of acceleration of block

  • queenspublic
  • · Replies 8 ·
Replies
8

Finding tension in ropes supporting a man on a scaffold

  • a.a
  • · Replies 1 ·
Replies
1

What Is the Electric Field Perpendicular to a Uniformly Charged Rod?

  • bocobuff
  • · Replies 1 ·
Replies
1

Centripetal Acceleration of hard drive

  • UMich1344
  • · Replies 3 ·
Replies
3

Calculating Potential Energy in a Parallel Plate Capacitor

  • xswtxoj
  • · Replies 4 ·
Replies
4

How much work is done. Physics problem

  • xswtxoj
  • · Replies 2 ·
Replies
2

Problem with Thermal expansion: volume

  • mimi83
  • · Replies 1 ·
Replies
1

Refrigerator Question: Does Leaving the Door Open Cool an Enclosed Room?

  • vladittude0583
  • · Replies 3 ·
Replies
3

What is the Expectation Value of Momentum for a Wave Function?

  • Feldoh
  • · Replies 4 ·
Replies
4

Did I Solve Problem 3-48 Correctly?

  • aeubz
  • · Replies 5 ·
Replies
5

Problem with Bernoulli's equation.

  • mimi83
  • · Replies 2 ·
Replies
2

Projectile Motion of a grasshopper off a cliff

  • Todd88
  • · Replies 5 ·
Replies
5

What is the Charge and Error in a Parallel Plate Capacitor?

  • hellogirl88
  • · Replies 2 ·
Replies
2
Replies
1

Solving for Maximum Height of Ball Launched at 60 Degrees

  • meagr
  • · Replies 1 ·
Replies
1

Solving a Physics Problem: Falling Ball from Tabletop

  • lauriecherie
  • · Replies 5 ·
Replies
5

How Do You Calculate Masses from an Acceleration vs. Force Graph?

  • StephenDoty
  • · Replies 4 ·
Replies
4

Calculating Work in a Pulley System

  • james brug
  • · Replies 11 ·
Replies
11

Laboratory setup -Capacitance vs. Temperature

  • risingplague
  • · Replies 4 ·
Replies
4

What Is the Magnitude of the Acceleration in an Atwood's Machine?

  • queenspublic
  • · Replies 7 ·
Replies
7

Blocks on turntable with friction = hard problem

  • yopy
  • · Replies 1 ·
Replies
1

What is the minimum coefficient of static friction between tires and road

  • zerogoal
  • · Replies 10 ·
Replies
10

Solving Soccer Ball Catch: Find Avg. Speed

  • lauriecherie
  • · Replies 10 ·
Replies
10

Finding Launch Angle Using Projectile Motion Equations

  • Imuell1
  • · Replies 7 ·
Replies
7

Force between parallel plates in a capacitor

  • asi123
  • · Replies 1 ·
Replies
1
Replies
8
Replies
1

Velocity and height of a ball thrown at an angle

  • enantiomer1
  • · Replies 3 ·
Replies
3

Resultant displacement of two perpendicular vector components

  • Skatehabitat2
  • · Replies 3 ·
Replies
3

Conservative forces on a sliding block

  • peaceandlove
  • · Replies 16 ·
Replies
16

Two infinite rods with charges

  • Eric_meyers
  • · Replies 15 ·
Replies
15

Show that dA/dt is constant in time

  • nns91
  • · Replies 7 ·
Replies
7

Which statement correctly describes Bohr's quantum model of the atom?

  • stickplot
  • · Replies 13 ·
Replies
13
  • Poll Poll

What is the Resistance of Your Calculator?

  • zapped
  • · Replies 2 ·
Replies
2

What is permanent magnet B field equation?

  • ShahinPhD
  • · Replies 3 ·
Replies
3

How Is Total Work Calculated for Two Connected Blocks with Friction?

  • james brug
  • · Replies 1 ·
Replies
1
Replies
1

Finding coefficient of kinetic friction from cable tension and mass

  • susyq232
  • · Replies 1 ·
Replies
1

Easy Newtonian Gravitation viewed from a rusty perspective.

  • zaarin_2003
  • · Replies 4 ·
Replies
4

Is the flux Q an integral in exercise c?

  • dirk_mec1
  • · Replies 1 ·
Replies
1
Replies
1

Astronomy - ratio of the magnitude of the force of sun and moon gravity

  • JordanTim
  • · Replies 5 ·
Replies
5

Physics Thermodynamics - Finding Work

  • misa
  • · Replies 2 ·
Replies
2

Carnot Icemaker: Calculate Heat Rejected

  • horsegirl09
  • · Replies 4 ·
Replies
4

Centripetal acceleration and static friction

  • shaanyr
  • · Replies 4 ·
Replies
4

Finding centroid y-coordinates for moment of inertia of a cross section

  • ricky_fusion
  • · Replies 4 ·
Replies
4

Simple Harmonic Motion and Reference Circle

  • Pius
  • · Replies 2 ·
Replies
2

Block sliding down slope against spring

  • TG3
  • · Replies 2 ·
Replies
2

Ionisation chamber current in wire vs air and residual current causes

  • catkin
  • · Replies 3 ·
Replies
3

Magnet Movement When Charged Rod or Bar Magnet is Brought Near

  • zapped
  • · Replies 1 ·
Replies
1

How Far Does a Block Travel Before Stopping?

  • TG3
  • · Replies 11 ·
Replies
11

Really really on a projecton physics problem

  • DragonReborn
  • · Replies 7 ·
Replies
7

Minimum distance between two vectors on a graph?

  • dan.g117
  • · Replies 1 ·
Replies
1

What Is the Spacing Between the Slits in the Double Slit Experiment?

  • Spirochete
  • · Replies 9 ·
Replies
9

What is the Electric Field at P(0,0,4)?

  • LeeroyJenkins
  • · Replies 1 ·
Replies
1

Finding spring constant for block compressing spring on incline

  • mrnastytime
  • · Replies 2 ·
Replies
2

How Does Distance Affect Electric Flux Through a Square?

  • jordanjj
  • · Replies 1 ·
Replies
1

Electric Potential/Work - POint Charges on a Square

  • alicemunro
  • · Replies 1 ·
Replies
1

What Forces Affect the Acceleration of an Airboat?

  • hatcheezy
  • · Replies 1 ·
Replies
1

Find the magnitude of the torque

  • jonnejon
  • · Replies 2 ·
Replies
2

Electron in a uniform field, acceleration

  • Specialmias
  • · Replies 2 ·
Replies
2

Infinitely Long Cylindrical Surface Problem

  • jordanjj
  • · Replies 2 ·
Replies
2

Force and Motion - Car going over a hill

  • Shatzkinator
  • · Replies 3 ·
Replies
3

How Does Air Force Affect Kinetic Energy in a Fancart?

  • magma_saber
  • · Replies 1 ·
Replies
1
Replies
4

What is the speed of the roller coaster at the bottom of the dip?

  • Amber430
  • · Replies 3 ·
Replies
3

3 masses attached by rope on table with 2 pulleys.

  • MaximaMan
  • · Replies 13 ·
Replies
13

Derive electric field of infinite plane from field of infinite line

  • theneedtoknow
  • · Replies 8 ·
Replies
8

Work Done on 46 kg Box by Forces: Applied, Frictional, Normal, Gravity

  • Amber430
  • · Replies 3 ·
Replies
3

How Do You Calculate Moles of Water Vapor in Air Using Ideal Gas Law?

  • owura143
  • · Replies 1 ·
Replies
1

How Do You Calculate the Height of a Waterfall Based on Temperature Change?

  • echoindia756
  • · Replies 3 ·
Replies
3

Force and Motion Sliding/Hanging Blocks

  • Shatzkinator
  • · Replies 3 ·
Replies
3

Uncertainty in Sound Recorder Measurements: Finding the Average and Range

  • Davronbek
  • · Replies 3 ·
Replies
3

How to Calculate Time and Distance for a Plane Flying with Wind and Vectors

  • cwalden91
  • · Replies 2 ·
Replies
2

What is the Evidence Supporting the Doppler Effect in Sonic Booms?

  • iFat
  • · Replies 10 ·
Replies
10

Reducing Uncertainty in an Experiment to 0.012 s

  • bocobuff
  • · Replies 3 ·
Replies
3

Calculating Thermal Energy Dissipated from Brakes on a Descending Car

  • Stryder_SW
  • · Replies 2 ·
Replies
2