Frames Definition and 610 Threads

Homework Statement A frame is accelerating uniformly along the x-axis relative to an inertial frame (x,y,z) with acceleration a.Find the transformation between the frames given that the origins concide at t=0. Homework Equations The lorentz transformations cannot apply here ,but what...

Homework Statement [PLAIN]http://online.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys211/oldexams/exam2/sp10/fig3.gif A 4.0 kg circular disk slides in the x-direction on a frictionless horizontal surface with a speed of 5.0 m/s. It collides with an identical disk that is...

Hey, this is my first post. I am a biology major so I know pretty much nothing about physics, yet sometimes it interests me way more than chromosomes do. So, given that I know nothing about physics, this is probably going to sound like a stupid question. But I've always wondered how it is...

This website has an animation that shows the difference between sidereal reference frames and synodic. http://www.sumanasinc.com/webcontent/animations/content/sidereal.html The motion of the moon is circular about the earth, yet apparently the moon has an apogee length that is 50,000 km...

What are the kind of loads that act on an automobile door frame while opening, closing other than the load on the hinge?

Homework Statement A mass of 2 kg lies on a horizontal table that is placed in the back of a truck. The mass is held in position by a string and a force of 6 N acts on it in the -y direction. The truck then accelerates in the +x direction. As a result, an observer in the truck sees that the...

Homework Statement A small container of water is placed on a carousel inside a microwave oven, at a radius of 12.0 cm from the center. The turntable rotates steadily, turning through one revolution in each 7.25 s. What angle does the water surface make with the horizontal? Homework...

Homework Statement A 110-m-wide river flows due east at a uniform speed of 3.3 m/s. A boat with a speed of 8.6 m/s relative to the water leaves the south bank pointed in a direction 37 degrees west of north. What is the (a) magnitude and (b) direction of the boat's velocity relative to the...

From what I can glean, since kinetic energy = 1/2 mv^2, it follows that a doubling of velocity requires a quadrupling of energy. One joule is required to accelerate a 1 kg mass from zero to one meter per second per second. ie 1m/s2. Now, to further accelerate the mass to 2 meters per second...

Let’ say; “A” can see and measure a stone falls to the Earth let’s say 10 meter per 1 Earth-second. “B” lives at Mercury and can see the same thing. But “B” would do not see the exactly the same, because seen from “B’s” viewpoint time / distance is not the same as for “A”. Let us say...

A swimmer who achieves a speed of 0.75 m/s in still water swims directly across a river 72 m wide. The swimmer lands on the far shore at a position 54 m downstream from the starting point. (a) Determine the speed of the river current. (b) Determine the swimmer?s velocity relative to the shore...

in at 0:47:00 Susskind begins discussing accelerated reference frames and notes that they relate to hyperbolas rather than parabolas. I understand the concept and need for the proper acceleration to be asymptotic at C. Susskind seems to infer that an observer in the accelerated frame will...

Homework Statement Let's say that there is a bicycle traveling forward and we only see it from behind. As it rolls to turn, it induces some accelerations. If we were to measure those accelerations on the bicycle frame itself, we would see a Lateral Acceleration (lets call it Aym) and and a...

The problem is attached to this post, basically i need the exterior reactions and how to work them out. i know i need to take moments I am just not sure how to work it out. Basically what i worked out is i assumed horizontal members are equally to 1 sum of the horizontal = 0...

This has been discussed in a number of threads and in FAQs. I was wondering what constituted a rest frame as nothing in the universe is at rest, if you work the figures out we are moving at around 2.5% c. In another thread I found out that at rest simply meant not accelerating. This means...

How I studied relativity, we postulated that a particle traveling at c in one inertial frame travels at c in all inertial frame. But now looking through a book, I see that they just postulate that all laws of physics are same in all inertial frames, and that there is a speed limit (c). However...

Hi This question is taken from the book Classical mechanics by Gregory. Please clear this doubt TIA ------------- Suppose that a reference frame fixed to the Earth is exactly inertial. Which of the following are then inertial frames ? A frame fixed to a motor car which is (i) moving...

sorry to bring this up again, i have just started special relativity and the constancy of c is a bit confusing, i get how c is the same in all inertial frames but what about accelerating frames? do observers in acceleration still see c as a constant? i have seen many forum posts and they always...

I found this article: http://www.csa.com/discoveryguides/gravity/overview.php" The article says gravity moves at the speed of light. But does gravity do so in any reference frame, like light does? Thanks, Jake

If all frames of reference are taken as equally valid. when a car moves, to the passengers in the car the world is moving in the opposite direction. Moving the whole world should take a lot more chemical energy than was contained in the gas that was burnt... I know the passengers in the car...

Quick question: Is Planck time the same in all reference frames? Is it different at, say, half the speed of light than at a relatively stationary point? What about in a severe gravitational field, like a black hole?

Homework Statement [PLAIN]http://www.antonine-education.co.uk/Physics%20A%20level/Options/Module_8/Topic_6/cars_4.gif What is the speed of sound, relative to: A - B - C - Homework Equations None. The Attempt at a Solution For B, since B is a stationary reference point...

Consider two point charges in space: one positive(+Q) and other negative(-Q), lying on the y-axis and separated by distance 'r'. In frame A, both charges are at rest so, only attractive electrostatic force (F_elec) acts on both the charges which is defined by coulombs formula. In another frame...

Homework Statement If you are on the merry-go-round going in a circle at constant speed, are you looking at the world in an inertial, or non-inertial frame of reference? How do we tell whether from one's viewpoint, they are looking at something from an interial or non-inertial frame of reference?

What is a non-inertial reference frame? how is it defined?

Dear all, I'm trying to understand better why gravity makes impossible to physically define an inertial reference frame. Firstly, we must have an operational procedure that allows us to physically define an inertial reference frame. Secondly, we must show that gravity makes this procedure fail...

I understand that I don't "get" the whole HD video thing but regardless, what the HELL is up with video files with 60 fps? One needs an expensive computer to adequately display such a film and for what? Is there really some dumb *** who has tricked himself into thinking he can even SEE the...

Supposed, for sake of discussions. There are preferred frames. Could a field (field in the context of higgs field, or other fields) be a preferred frame? What is a valid preferred frame where it is instantaneously to say communication between 100 billion light years distance and not...

So apparently SR can handle non-inertial reference frames, and there are supposedly some interesting effects that come about, like non-constancy of the speed of light. I was wondering if anyone knew where I could find a treatment of accelerating frames in SR (like a textbook)?

Fairly straight forward question. If you have a set of three vectors specifying a frame of reference and a second set of 3 vectors stating another frame of reference. How do you get the Euler angles associated with that rotation? More generally I am considering the relative orientation of one...

In a true inertial frame inside a train compartment, it is impossible to do an experiment that can tell you if you are moving or not. This is a key consequence of Newton's Laws Of Motion. However, if someone had a neutrino detector, or a Higgs detector (assuming they exist), wouldn't it be...

A very important idea in General Relativity is, same laws in all reference frames. How does that work in rotating reference frames? Jonny

Sorry if I should be posting as homework, but it's not homework anymore and I'm just curious about the answer. My question is simple and doesn't require answering the actual homework question I had. If there is a force on a charge in one inertial frame of reference, will there also be a force...

If I am standing at the bottom a spaceship of a Length L moving at a certain speed v (let's say half light speed so that relativistic effects aren't negligible), how would I go about calculating how long it would take the light beam to reach the top of the spaceship? In Newtonian mechanics...

I've had a good search through the archives and haven't found an answer to this question. Many apologies if this is old ground. . . Having read the threads on the Pioneer Anomaly a quick question to which I'm sure there is very simple answer (I just don't know what it is !): When...

Homework Statement the acceleration of a particle as seen from 2 frames s1 and s2 is 4 , what can be the value of acceleration between s1 and s2 Homework Equations The Attempt at a Solution the answer to this question is anything between 0 to 8 , but i do not know the reason , pl...

Homework Statement I'm required to make a page that has the following format: Left Frame Items with prices and check boxes next to them An "Update Order" button at the bottom so the order details on the Right Frame can be updated. Right Frame A "receipt" form with all the...

Homework Statement A particle as observed in a certain reference frame has energy 5GeV and momentum 3GeV. what is the energy in a frame in which its momentum is equal to 4GeV/c? what is its rest mass? what is the relative velocity of the two reference frames? Homework Equations The Attempt at a...

http://news.blogs.cnn.com/2011/03/09/japanese-company-announces-breakthrough-in-carbon-fiber-technology/ Is this really feasible? I was under the impression that mass production of carbon fiber structures like this was still too slow and the fiber too expensive to make? Obviously I'm...

My text says, "Note that in an arbitrary n-dimensional vector space, there is no well-defined notion of "right-handed", although there is a well defined notion of orientation." I don't see why. An n frame (a1,a2,...,an) is called right handed in R^n if det[a1 a2 ... an] > 0, but I guess we'd...

I accept that the FAQ section is there to cut down on repetitive questions, but this arises out of an answer in the FAQs. Would this line of reasoning not lead to the conclusion that, even without an inertial frame of its own, a photon would not be able to be stationary relative to itself?

Does special relativity hold between two inertial reference frames that are undergoing relative acceleration? For example, consider two spaceships traveling toward each other on parallel (but not collinear) trajectories. They would pass each other at some non-zero distance, and thus their...

I am generally pretty sloppy in my terminology on this point and use "reference frame" almost synonymously with "coordinate system". Is this a correct distinction between them: A coordinate system is a mapping from points in R4 to events in the manifold A reference frame is an orthonormal...

It is possible to synchronize two inertial frames with a relative speed between them such that what they measure of each other is purely Galilean. That is, according to each of the frames, they will measure no time dilation of each other, so their clocks will tick at the same rate, no length...

Homework Statement Not really a homework/coursework problem, I'm just trying to make sense of some class notes from our chapter on special relativity. I'm trying to find the expression for electromagnetic wave propagation in a reference frame S' that is moving at a constant velocity with...

This is what my teacher told me, but I still don't really see how it works. Say a person is in a car traveling at constant velocity, and it crashes into a tree, from an inertial frame of reference (the road), the person in the car continues traveling at the constant velocity of the car until...

Hi! I'm currently a student taking a classical mechanics course. Finals are coming up, and I've come to realize that I seem to have a firm grasp of most of the material (energy, forces, etc...) but not momentum. I know this because I was flabbergasted by a problem on my last midterm that...

Homework Statement In the old West, a marshal riding on a train traveling 35.0 m/s sees a duel between two men standing on the Earth 55.0 m apart parallel to the train. The marshal's instruments indicate that in his reference frame the two men fire simultaneously. (a) Which of the two men, the...

Looking down from a stationary tree branch, a merry-go-round spins in a counterclockwise direction with an angular velocity of 1 radian per second. a squirrel of mass 0.2 kg sits on the outer rim of the merry-go-round, at a radius of 2.0 meters. a) what is the magnitude and direction of the...

Homework Statement I'm doing a problem in which an ant crawls in a circle on a spinning pottery wheel. Say I'm looking at the friction which holds the ant in place. It keeps the ant from slipping. Looking at it in the inertial frame of reference, I know that the centripetal force points...