What is Frame: Definition and 1000 Discussions

A vehicle frame, also historically known as its chassis, is the main supporting structure of a motor vehicle to which all other components are attached, comparable to the skeleton of an organism.
Until the 1930s, virtually every car had a structural frame separate from its body. This construction design is known as body-on-frame. By the 1960s, unibody construction in passenger cars had become common, and the trend to unibody for passenger cars continued over the ensuing decades.Nearly all trucks, buses, and most pickups continue to use a separate frame as their chassis.

View More On Wikipedia.org
Recent contents Top users
  1. C

    What must be one's speed, relative to a frame S, in order....

    ... in order that one's clocks will lose: (a) 1 second per day as observed from S? (b) 1 minute per day as observed from S? I was referencing this:( http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/tdil.html#c2 ) hyperphysics page but I still can't seem to understand what I need to do to...
  2. SDewan

    Torque from a frame of reference

    Whenever we define torque from a frame of reference, is it necessary for the frame to be inertial? Please explain because I am unclear on this.
  3. B

    Centrifugal acceleration in rotating frame

    Homework Statement I have a doubt about the way to calculate the centrifugal acceleration for a point P that rotates with angular velocity ##w_1## wtr a inertial frame on a platform that rotates with angular velocity ##w## (##w_1>w)##. I want to find the centrifugal acceleration in the...
  4. F

    Spacelike separation. Finding a specific frame.

    1. The problem: If the Sun blows up at some instant and four minutes later we on Earth sit down to eat lunch, these two events are separated by a spacelike interval. The explosion of the sun cannot have influenced us at the time we sat down because it takes 8 minutes for light to reach us from...
  5. B

    Acceleration in a non inertial reference frame

    Homework Statement A platform rotates with ##\omega=10## rad/s around ##z##-axes. A ball is connected, with a yarn to ##z##. Its distance to the axes is 15 cm and it rotates with ##\omega=10## rad/s. There isn't friction between platform and ball. Suddenly, the angular velocity of the...
  6. F

    Frame of Reference: Definition & Explanation

    Hello, My understanding is that a a frame of reference is a theoretical framework that is used to describe the motion of an object allowing for measurements of position, distance and time. A frame of reference always implicitly includes a coordinate system (cartesian, spherical, cylindrical...
  7. S

    Statics: finding forces in frame

    Homework Statement When the piston CD is lowered, ACB and CBE are horizontal, and they ask for the force in piston CD. Homework EquationsThe Attempt at a Solution So first we look at the entire frame ACDBE, and we sum moments at A: -(14)(2500) + 24E(suby) = 0; E(suby) = 1458 Then A(suby) is...
  8. S

    1D Elastic Collision in CM frame

    Hi all, I've been self-studying a first year uni introductory mechanics course, and I'm confused with the derivations involved in calculating the final state of an elastic collision in one dimension, given the initial state. So basically we have masses of m_1, m_2 with initial velocities v_1i...
  9. F

    Show particles are scattered at right angles in the CM frame

    Homework Statement Suppose that in a fixed-target proton-proton collision, the two protons are scattered with equal energies at equal angles θ/2 to the beam. Show that in the CM frame, this implies they are scattered at right angles to the direction of the beam. Calculate the energy and...
  10. P

    Inertial Frame of Reference vs Spacetime

    Is the inertial frame of reference the same thing as space time?
  11. P

    How to figure the stress on a pulling truck frame?

    I'm in college working towards a degree in Mechanical Engineering, so far I've only made it through physics 1 and calculus 2, but I've been building race cars and pulling trucks and tractors since i could hold a wrench. I work for a guy that builds super modified four wheel drive pulling truck...
  12. X

    Relativistic Centre of Momentum Frame

    Homework Statement A particle of mass m ha speed 0.546c relative to inertial frame S. The particle collides with an identical particle at rest in the inertial frame S. Relative to S and in terms of c, what is the speed of S' in which the total momentum of these particles is 0. Homework...
  13. H

    Changing the frame of reference

    I'm currently doing a student project at uni and I'm trying to design magnetorquers for cubesats.Before I make the prototype I need a simulation of what will happen.The problem is that for my calculations,I need to change the frame of reference of the geomagnetic field.So basically I need to go...
  14. A

    How a rotational motion could be in an inertial ref. frame

    When rotation exists, so does the radial acceleration. It can be defined as ar=-ω2xr So there is a kind of acceleration with rotation all the time. Thus, we have to use non-inertial reference frame all the time. Could a rotational movement be analysed in an inertial ref. frame?
  15. D

    Relation between lab frame and Breit Frame

    Homework Statement What is the Lorentz-transformation that one would use to go from the lab frame to the Breit Frame? [/B]
  16. REVIANNA

    Momentum in centre of mass reference frame

    my book says " the total momentum is zero in the centre of mass reference frame.This should not surprise you" but ITS NOT INTUITIVE FOR ME. I am considering a completely elastic collision. 1. I know the v_cm is const because there are no ext forces on the system of the two masses undergoing 1D...
  17. V

    Find Perfect Fluid & EM Tensor in Rest Frame

    we use perfect fluid which is characterized by a energy density and isotropic pressure for general forms of matter. When guessing the values of energy momentum tensor indices we can use the physical insight that they are the flux of four momentum in a constant surface of spacetime. The...
  18. UncertaintyAjay

    Magnetic Force and Frame of Reference

    So, a friend asked me this question in school and I've come up with an answer, I'm just not sure that it is right. Say you have a charged particle moving perpendicular to a magnetic field. There will be a force acting on it given by F=qvB. Now suppose your'e moving along at the same velocity as...
  19. T

    Non-arbitrary frame of reference for acceleration?

    The reason we can choose a frame of reference arbitrarily is that a physical system is not dependent on an absolute position, orientation or time. According to Noether's Theorem, the invariance of a system under a change of position is equivalent to the momentum conservation law. In the same...
  20. N

    Local Inertial Frame in General Relativity - Neutrino

    Hello, in general relativity we introduce local inertial frames to be such frames where the laws of special relativity holds. Let ξα the coordinates in the local inertial frame, so we get ds²=ηαβdξαdξβ. If we switch the frame of reference to coordinates xμ : ξα=ξα(x0,x1,x2,x3) and with...
  21. sandyforever

    Is force independent of reference frame?

    Homework Statement Recently, I have been wondering whether forces are independent of reference frames(inertial and non inertial). From Newton's law we know that the second law is valid only for inertial frames. But what about the non inertial frames. Let ∑F be the net force on an object in an...
  22. W

    Air vs water as insulation for my cold frame

    Hi, new here, with bits & pieces of basic college physics rattling around in my brain from years ago, so explain things at that level, please. I am building a cold frame in order to try growing food through the winter in NJ, USA. It will get below freezing here at night but not every day. I...
  23. W

    Momentum Analysis in Rest Frame Decay of Particle with Mass M

    Homework Statement A particle with mass M at rest decays into two particles with masses ma=0.15M and mb=0.65M . i) Discuss the relative directions and magnitudes of the momenta of these two particles in the centre of mass reference frame. Homework EquationsThe Attempt at a Solution What's the...
  24. J

    Speed of an object in a rotating frame

    Is it meaningful to measure the speed of an object in a rotating frame, and if so how do you do it in the following case? Consider a rim of circumference 100 rotating at 0.8c, both measurements with respect to the inertial lab frame. An object is at a point on the rim with a standard clock...
  25. sweet springs

    Uniformly accelerating frame of reference

    In an inertial frame of reference let numerous standard rockets that load synchronized standard clocks place on all the space lattice. Simultaneously the rockets start to move with same intrinsic acceleration to the same direction. In other words there exists a common instantaneous inertial...
  26. L

    Tension in string at a point on a frame

    Homework Statement Hi all. What concerns me here is that it's worth 10 marks, but the solution I've tried only takes 2 steps. Am I missing some relation between the frame support and the pulley altering the components of the tension, or is the solution really just a basic trig conversion...
  27. Coffee_

    Wavefunction in rotating frame

    Hello, I have the following problem: A system in the lab frame is described by a time dependent rotating potential ##V(\vec{r},t)##. So ##H_{lab}=\frac{\boldsymbol{p}^{2}}{2m} + V(\vec{r},t)##. My book says that the Hamiltonian in the rotating frame is given by...
  28. mrtoodles

    Reaction forces in a pin jointed frame

    This is the question: http://i.imgur.com/Ex2Yx4l.png I have calculated all the angles in the frame, and have drawn line of forces so that the reaction force at x, reaction force at y, and the 10KN meet up. From then I am stuck, and don't know how to find the angle theta...
  29. M

    Inertial Frames of Reference - Understanding Special Relativity for 11-Year-Olds

    I'm 11 and I'm trying understand what Special Relativity is about. How many different inertial frames of reference do we have and what are they?? I know what it means.
  30. V

    Determining Position and Center of Mass using Reference Frame

    Homework Statement Homework Equations Xcm = (x1m1+x2m2) / (m1+m2) The Attempt at a Solution ok so I'm having trouble understanding what's happening in the question... when the penguin moves, is the sled also moving? If it's friction less ice then if the penguins moves L, the sled will...
  31. F

    Using Light as a absolute frame of reference?

    If light travels in a straight line , why can't we use it as absolute frame of reference? This thought experiment is done in the absence of external forces and gravity. One person standing inside a box ,sends a photon parallel to the bottom of the box from one end to another end , whether...
  32. newjerseyrunner

    Time frame of entangled particles

    I was thinking about entanglement today and found myself struggling to envision entanglement and relativity working together. If I send entangled electrons out in opposite directions, their states are not determined until one of them is observed. I know that. What if one of them passes...
  33. D

    Synchronized clocks in a moving frame

    Homework Statement It is not a homework question.I am trying to understand the concept in the attached diagram but I stuck.Hope someone can help Homework EquationsThe Attempt at a Solution Please see the lower part of the note,stating that Δt' = Δt/γ.However,imagine you are in the moving frame...
  34. RyanH42

    How Many Frames Are Needed to Show a 2 Hour Motion Picture on 35 cm Film?

    Homework Statement The height of motion picture film's frame is 35 cm.If 24 frame go by 1 sec calculate the total number of frames required to show ia 2h long motion picture. Homework Equations simple Equation which I don't need to write here I guess The Attempt at a Solution The Height of...
  35. 9

    Coordinate transformation - NED and ECEF frames

    Hi, I have a reference device that outputs euler angles, which are angles that relate the sensor body frame to the north east down frame. These angles are called pitch roll and yaw. The sensor is an accelerometer. I know how to get the rotation matrix that will put accelerations from the...
  36. D

    Simultaneity: disagreement, in the same reference frame

    Hello PF. There are two lightning flashes , and two stationary observers. Observer 1 who is equidistant from the flashes, sees them as simultaneous Observer 2 stands one step to the side of observer 1, and is not equidistant. He sees the flashes as separate, the light having unequal distances...
  37. E

    Frame of reference: grade 2n vs. grade 2n-1

    Hello all, was it ever a point of discussion in cosmology, quantum-theory, mechanics, etc. that there is a fundamental difference in describing a physical process in a 2n-grade (4th, 6th, 8th-grade) frame of reference in comparison to a 2n-1-grade (3rd, 5th, 7th-grade) frame ? Thanks in...
  38. J

    What's the reference frame for the universe as a whole?

    I'm just beginning physics and teaching myself classical physics from an intro physics textbook and in the 2nd chapter it described reference frames. This got me thinking. My reference frame is the earth, as that is what I use to describe position, displacement, ect. But what is the reference...
  39. E

    Classical mechanics - hunter and monkey - frame of reference

    Hi, This might sound very basic and but i am just starting to learn physics. I an lecture by prof. walter lewin, he descibes the hunter and monkey scenario. The monkey jumps from the tree as soon as the hunter aims and shoot his gun. the bullet hits the monkey anyway. In calculating the time it...
  40. H

    Centripetal Force: Inertial vs Non-Inertial Frame Time

    Hello, I've been thinking about inertial and non inertial reference frames. A common example is non rotating reference frame vs a rotating reference frame. As illustration, I have attached two images below. The left is the inertial frame and the right is the non inertial frame. Both...
  41. D

    Deriving Riemann Tensor Comp. in General Frame

    How does one derive the general form of the Riemann tensor components when it is defined with respect to the Levi-Civita connection? I assumed it was just a "plug-in and play" situation, however I end up with extra terms that don't agree with the form I've looked up in a book. In a general...
  42. B3NR4Y

    Find the Speed of an Electron in the lab frame

    Homework Statement An electron moves to the right with a speed of 0.90c in the laboratory frame. A proton moves to the left with a speed of 0.77c relative to the electron. Using the Lorentz coordinate transformations, find the speed of the proton in the laboratory frame Homework Equations $$...
  43. I

    (APDL) use two sections in an static analysis (beam/column)

    Hi, I'm just start using APDL but i have been stuck trying to make an analysis with two diferent sections, i'd like to make a frame with two column and a beam but i don't know how, thank you.
  44. K

    Moving frame in a magnetic field

    Homework Statement A quadratic frame which has an edge of ##a=10 cm##, was put inside a magnetic field ##B=0.01T##. The frame's opposite vertices were being pulled with a uniform speed ##v=1mm/s## until the frame became flat. Find the charge that passed through the frame. The plane of the frame...
  45. MattRob

    Proper Time in Rain Frame: Exploring GR

    So, I've been working through "Exploring Black Holes: Introduction to General Relativity" by Taylor and Wheeler, and I'm somewhat puzzled by a term in the "Rain Frame." The "Rain Frame" is meant to be a frame of reference of an object initially released from rest at infinity as it free-falls...
  46. Q

    Superposition / Probability Wave - frame rate problem?

    Okay, so this is my first post, and I'm probably going to embarrass myself, but here goes. I have a bunch of questions. So we have an atom, consisting of a proton and electrons, and these electrons spin either clock wise or anti clock wise but in fact appear to do both... until measured...Is...
  47. K

    A rectangular conducting frame in a magnetic field

    Homework Statement A frame is made of two firm wires of length ##h## and a rod of length ##l## and mass ##m##. This frame can rotate around horizontal axis in uniform magnetic field ##B##. In a short amount of time ##τ## a current ##I## passes through the frame. What is the maximum angle that...
  48. G

    Understanding Inertial Frame of Reference

    There is a lot of discussion on this but I still have doubts. Can someone help clarify and point me to correct thread? Object free falls due to gravity (acceleration) so the frame should be non inertial for outside observer. But object does not experience pseudo force in free fall so it may be...
  49. Strilanc

    Does the Hubble expansion of space have a preferred frame?

    I have a paradox that I don't know the answer to. Special relativity has no preferred frame, but it seems like adding an exponential expansion to space introduces such a frame. The Setup Suppose we're in a universe with a much faster expansion rate, where the space between any two objects...
  50. E

    Conservation of energy in a moving frame

    I know a similar question has been asked but I'm still kind of stumped. Imagine the Earth on the left and a small mass to it's right separated by some distance h. You are in the frame of reference where the Earth and the small mass are moving to your right at some speed v. So, both the Earth...
Back
Top