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Introductory Physics Homework Help

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  1. micromass

    Guidelines for students and helpers

    Sep 23, 2014
    2
    43,983
    Replies: 2
    9
  2. Mark44

    Hey! I posted here but now it's gone!

    May 10, 2014
    0
    17,125
    Replies: 0
    6
  3. Doc Al

    Introductory Physics Formulary

    Mar 17, 2012
    6
    119,127
    Replies: 6
    18
  1. fab13

    Bremstrahlung Braking radiation spectra expected and total power

    Oct 18, 2018 at 9:21 AM
    12
    162
    Replies: 12
    0
  2. xcortz

    Free falling ball with and without air resistance

    Oct 18, 2018 at 9:20 AM
    3
    113
    Replies: 3
    2
  3. songoku

    Correct statement about coherent sources and interference

    Oct 18, 2018 at 9:09 AM
    15
    198
    Replies: 15
    0
  4. Yellowkies_3275

    [Help Please] An Experiment to Determine the Coefficient of Friction

    Oct 18, 2018 at 8:41 AM
    6
    146
    Replies: 6
    4
  5. Rain10399

    Finding the pressure of a gas in three identical balloons

    Oct 18, 2018 at 7:40 AM
    9
    183
    Replies: 9
    4
  6. gibberingmouther

    Problem About Change in Momentum/Impulse

    Oct 18, 2018 at 7:10 AM
    8
    265
    Replies: 8
    3
  7. arturo

    Can we find work, and if not, what are we missing?

    Oct 18, 2018 at 7:06 AM
    9
    128
    Replies: 9
    2
  8. JesseK

    Equation solving

    N/A
    –
    –
    Replies: –
  9. Mahavir

    Decay scheme help.

    N/A
    –
    –
    Replies: –
  10. Zack K

    Centroid of an isoceles triangle

    Oct 17, 2018 at 9:20 PM
    1
    101
    Replies: 1
    0
  11. timetraveller123

    Confusion in the derivation of the force on a magnetic dipole

    Oct 17, 2018 at 5:16 PM
    11
    589
    Replies: 11
    3
  12. sam cole

    Which answer is correct? Grocery Bag Net Force Question

    Oct 17, 2018 at 4:51 PM
    5
    113
    Replies: 5
    0
  13. Ebony

    Drum and cable problem

    Oct 17, 2018 at 4:19 PM
    2
    181
    Replies: 2
    0
  14. cs2018

    Sliding sideways along a plane

    Oct 17, 2018 at 4:17 PM
    2
    100
    Replies: 2
    0
  15. SakuRERE

    Static equilibrium: Find the tension in a support cable

    Oct 17, 2018 at 4:10 PM
    6
    94
    Replies: 6
    2
  16. Keeeen

    Single transfer lag in an open-loop system

    Oct 17, 2018 at 11:22 AM
    8
    227
    Replies: 8
    0
  17. Jahnavi

    Photoelectric current and a convex lens

    ... 2 3
    Oct 17, 2018 at 11:16 AM
    56
    1,066
    Replies: 56
    27
  18. Zeke Bevan

    Newton's Third Law Problem: Two masses, a rope and a pulley

    ... 2
    Oct 17, 2018 at 11:11 AM
    21
    226
    Replies: 21
    0
  19. devilish_wit

    Using the Vy versus t graph to determine the y-component of the acceleration of the puck

    Oct 17, 2018 at 9:25 AM
    2
    168
    Replies: 2
    0
  20. JessicaHelena

    A ladder against a wall problem

    Oct 17, 2018 at 8:12 AM
    2
    112
    Replies: 2
    0
  21. Mohammed S

    Vertical Circle (Circular Motion)

    Oct 17, 2018 at 1:27 AM
    5
    150
    Replies: 5
    1
  22. HAF

    Forces on an object in vertical circular motion

    Oct 17, 2018 at 12:58 AM
    8
    217
    Replies: 8
    2
  23. Indigo_Blue

    Confused whether an object is at rest or has velocity at t=0

    Oct 16, 2018 at 9:55 PM
    6
    115
    Replies: 6
    1
  24. YMMMA

    Where is the electric field greatest in magnitude?

    Oct 16, 2018 at 10:49 AM
    6
    134
    Replies: 6
    1
  25. YMMMA

    What are the forces acting on an object?

    Oct 16, 2018 at 10:13 AM
    2
    112
    Replies: 2
    1
  26. YMMMA

    Magnetic force direction on a positive and negative charges

    Oct 16, 2018 at 9:34 AM
    5
    86
    Replies: 5
    4
  27. michealyap

    Can anyone help me with this thermochemistry problem?

    ... 2
    Oct 16, 2018 at 9:12 AM
    21
    291
    Replies: 21
    0
  28. YMMMA

    Electricity: 2 charged rods connected to a voltage source

    Oct 16, 2018 at 9:09 AM
    7
    154
    Replies: 7
    2
  29. Gregs6799

    Hinged Water Storage Tank -- Calculate the force on one side

    Oct 16, 2018 at 6:42 AM
    15
    359
    Replies: 15
    1
  30. Sam D

    How do I find refractive index uncertainties?

    Oct 16, 2018 at 5:00 AM
    3
    105
    Replies: 3
    0
  31. aa_o

    Feynman Exercise 27-1: Shape of glass surface to converge a light beam inside the glass

    Oct 16, 2018 at 2:46 AM
    5
    192
    Replies: 5
    3
  32. MikeyArey

    Evolution of a particle in a well

    Oct 16, 2018 at 2:12 AM
    10
    122
    Replies: 10
    3
  33. Alejandro Nava

    Finding Force by using the coefficient of friction and mass

    Oct 16, 2018 at 12:38 AM
    16
    475
    Replies: 16
    0
  34. Scott McKinnon

    Need help with a pulley and tension problem

    Oct 16, 2018 at 12:00 AM
    3
    146
    Replies: 3
    1
  35. Santiago Tinelli

    Determine the mass of an object using the angle in the system

    Oct 15, 2018 at 11:52 PM
    15
    312
    Replies: 15
    1
  36. physicsstudent101

    Find angle of ladder equation

    Oct 15, 2018 at 7:53 PM
    1
    113
    Replies: 1
    1
  37. physicsstudent101

    How to find distance when a ball rolls slope with angle?

    Oct 15, 2018 at 7:52 PM
    1
    105
    Replies: 1
    0
  38. Mohammed S

    Circular Motion Problem: Child swinging on a rope

    Oct 15, 2018 at 6:11 PM
    2
    118
    Replies: 2
    1
  39. Coulombus

    Finding the energy density outside of an isolated charged sphere

    Oct 15, 2018 at 4:24 PM
    3
    266
    Replies: 3
    0
  40. JessicaHelena

    Torque about a pendulum's suspension point

    Oct 15, 2018 at 1:54 PM
    2
    84
    Replies: 2
    0
  41. Abhimessi10

    Rotation of a body

    Oct 15, 2018 at 1:22 PM
    8
    154
    Replies: 8
    0
  42. JessicaHelena

    Circular motion — the acceleration is not constant?

    Oct 15, 2018 at 1:04 PM
    1
    95
    Replies: 1
    0
  43. tornado

    ∇ x E = in Cylindrical Cordinates

    Oct 15, 2018 at 10:11 AM
    5
    355
    Replies: 5
    3
  44. ImmmCanadian

    Setting equations equal to each other

    Oct 14, 2018 at 9:31 PM
    3
    201
    Replies: 3
    0
  45. jack476

    B field and H field confusion, physics GRE

    Oct 14, 2018 at 8:33 PM
    2
    111
    Replies: 2
    0
  46. SakuRERE

    Incline with friction and two blocks

    Oct 14, 2018 at 6:23 PM
    5
    128
    Replies: 5
    3
  47. OnePunch

    Projectile motion where yi doesn't equal yf

    Oct 14, 2018 at 4:02 PM
    5
    134
    Replies: 5
    3
  48. JesseK

    Confused about units

    ... 2
    Oct 14, 2018 at 3:34 PM
    28
    354
    Replies: 28
    4
  49. GriffinC

    Given force as a function of x, how do I find the total energy?

    Oct 14, 2018 at 3:23 PM
    1
    146
    Replies: 1
    0
  50. Halit

    Artificial gravity in a spacecraft

    Oct 14, 2018 at 3:22 PM
    17
    328
    Replies: 17
    1
  51. GayYoda

    Weak Damping - how to relate the amplitude and phase difference

    Oct 14, 2018 at 1:36 PM
    4
    157
    Replies: 4
    0
  52. SakuRERE

    Tension on a massive rope

    Oct 14, 2018 at 11:12 AM
    11
    134
    Replies: 11
    3
  53. cnh1995

    Transient in a coupled circuit

    Oct 14, 2018 at 11:00 AM
    11
    162
    Replies: 11
    6
  54. cnh1995

    Electrical Network Problem: Power Transfer

    Oct 14, 2018 at 2:14 AM
    9
    384
    Replies: 9
    8
  55. Miguel Orta

    Oscillating horizontal mass attached to a spring with Friction

    Oct 14, 2018 at 1:11 AM
    1
    162
    Replies: 1
    0
  56. Austin Gibson

    Roller Coaster Question

    Oct 13, 2018 at 11:00 PM
    3
    112
    Replies: 3
    1
  57. AAAA

    Tension in a string being pulled from both ends

    ... 2 3
    Oct 13, 2018 at 1:42 PM
    45
    51,268
    Replies: 45
    5
  58. YMMMA

    Compare the speed and frequency of a wave in a thick rope

    Oct 13, 2018 at 1:22 PM
    10
    224
    Replies: 10
    9
  59. jasonchiang97

    Cannon on a vertical tower

    Oct 13, 2018 at 9:37 AM
    4
    160
    Replies: 4
    0
  60. Joao Victor Dantas

    Should I use time dilation or length contraction?

    Oct 12, 2018 at 4:50 PM
    5
    207
    Replies: 5
    1
  61. invariant99

    Equations of motion for a dual mass-spring-damper

    Oct 12, 2018 at 2:29 PM
    1
    111
    Replies: 1
    0
  62. Jenny Physics

    Angular momentum conservation in collision with a nail

    Oct 12, 2018 at 2:00 PM
    9
    206
    Replies: 9
    0
  63. SMilo

    How to find the maximum angle of a pendulum after a mass collides with it

    Oct 12, 2018 at 10:45 AM
    4
    1,188
    Replies: 4
    0
  64. irdeg

    Dynamics of a spiral movement

    Oct 12, 2018 at 9:06 AM
    10
    228
    Replies: 10
    4
  65. Appo

    Resistance of a non-ohmic device from its I/V graph

    Oct 12, 2018 at 8:03 AM
    10
    305
    Replies: 10
    2
  66. Ceshe000

    Forces and Friction Homework

    Oct 12, 2018 at 8:01 AM
    6
    994
    Replies: 6
    1
  67. devilish_wit

    How to find the y-component of Vi based on a Vy/t graph

    Oct 12, 2018 at 6:33 AM
    4
    180
    Replies: 4
    0
  68. YoshiMoshi

    State Space Model of an RL Circuit

    Oct 11, 2018
    1
    187
    Replies: 1
    0
  69. Johnnnnnnnn

    Rotational motion: Conservation of energy doesn't work...

    Oct 11, 2018
    11
    486
    Replies: 11
    1
  70. YMMMA

    Physics: Circular motion and the orbital speeds of satellites

    Oct 11, 2018
    2
    172
    Replies: 2
    3
  71. says

    Peak wavelength and Spectral Bandwidth

    Oct 11, 2018
    4
    203
    Replies: 4
    0
  72. Mulz

    Convert a spherical vector into cylindrical coordinates

    Oct 10, 2018
    9
    321
    Replies: 9
    0
  73. Cantphysics

    Finding Distance on an incline

    Oct 10, 2018
    2
    146
    Replies: 2
    0
  74. zehkari

    What is the minimum force at this angle that will move the box?

    Oct 10, 2018
    12
    189
    Replies: 12
    2
  75. Yellowkies_3275

    Projectile Motion - object that is shot at an angle of 55 degrees

    Oct 10, 2018
    8
    278
    Replies: 8
    4
  76. arturo

    Half Atwood machine: acceleration after inital force

    Oct 10, 2018
    3
    140
    Replies: 3
    1
  77. Student4Life

    Circular Motion: Swinging a rock on a string in a vertical circle...

    Oct 10, 2018
    1
    161
    Replies: 1
    0
  78. jasonchiang97

    Variation of potential energy with height

    Oct 10, 2018
    4
    160
    Replies: 4
    0
  79. elleo

    Formula to calculate the charge in a sphere

    Oct 10, 2018
    4
    133
    Replies: 4
    0
  80. Beth N

    Driven Oscillation: Springboard diving

    Oct 10, 2018
    1
    155
    Replies: 1
    0
  81. YMMMA

    Physics: transverse wave & wavelength & motion

    Oct 10, 2018
    15
    292
    Replies: 15
    1
  82. dkk

    Archimedes' principle -- Which box will sink first as we add coins...

    Oct 10, 2018
    4
    226
    Replies: 4
    0
  83. amyc

    An electron & a proton are each placed in an electric field

    Oct 9, 2018
    1
    136
    Replies: 1
    0
  84. Austin Gibson

    Find Her Acceleration (2 ice skaters pushing a 3rd skater)

    Oct 9, 2018
    7
    168
    Replies: 7
    2
  85. Screwed

    How to calculate a coefficient of performance (COP)

    Oct 9, 2018
    12
    430
    Replies: 12
    1
  86. Austin Gibson

    "How far did the car move while braking?"

    Oct 9, 2018
    14
    176
    Replies: 14
    6
  87. Dan_321

    Physics homework help regarding energy and friction

    Oct 9, 2018
    4
    139
    Replies: 4
    0
  88. amyc

    A charged cork ball is suspended on a light string in the presence of a uniform electric field

    Oct 9, 2018
    3
    143
    Replies: 3
    0
  89. devilish_wit

    A question about contact forces and friction

    Oct 9, 2018
    6
    164
    Replies: 6
    0
  90. MaximusDecimus

    Introductory Physics - Finding "little g"

    Oct 9, 2018
    5
    199
    Replies: 5
    5
  91. Arman777

    Deriving Lorentz Transformation

    Oct 9, 2018
    4
    146
    Replies: 4
    0
  92. YMMMA

    Physics: wavelength of sound waves

    Oct 8, 2018
    8
    242
    Replies: 8
    1
  93. sp3sp2sp

    Missing info from this question? (Max. acceleration possible for a vehicle)

    Oct 8, 2018
    3
    123
    Replies: 3
    0
  94. Swag ranger

    Acceleration in an inertial reference frame

    Oct 8, 2018
    3
    137
    Replies: 3
    0
  95. Austin Gibson

    What's the Total Force Exerted on the Skater?

    Oct 8, 2018
    4
    152
    Replies: 4
    4
  96. Cocoleia

    Finding nearest neighbour equilibrium distance

    Oct 8, 2018
    4
    101
    Replies: 4
    1
  97. devilish_wit

    Difficult time with motion graphs & dynamics

    Oct 8, 2018
    1
    96
    Replies: 1
    0
  98. PhysicsInNJ

    Compton Scattering- finding photon wavelength

    Oct 8, 2018
    5
    141
    Replies: 5
    0
  99. jasonchiang97

    Compatible Observables

    ... 2
    Oct 8, 2018
    23
    298
    Replies: 23
    1
  100. Zakiyah Afrin

    What will the wave velocity be in this string?

    Oct 8, 2018
    15
    342
    Replies: 15
    6
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