Why do we rotate along with the earth's rotation?

Doc Al

Quote by singh94

if the frictional force is constant ...... and the earth's speed be constant, how can we attain equilibrium?

It's not constant. (Have you read this thread from the beginning?)

Another doubt............ so we are moving with a speed of 1000miles per hourin west to est direction...... if i start runnning in the east to west direction at 5 miles per hour then what should be my real speed..... 995miles in the west to east direction or what?

What do you mean by 'real speed'? Speed is relative.

do i need to exert a force of 1005 miles per hour because if not then i am running in 2 opposite directions at the same time which is definitely not possible

A speed is not a force. And if you are moving at a constant velocity, the net force on you is zero. (Of course, on earth you'll be centripetally accelerating.)

JaredJames

Quote by singh94

I thought that would be the reply but i wasnt sure so any ways tell me atleast one thing must have come into existence...... so atlest one thing would have required friction or some force.
so we come back to the same point..... how did the first of the things to come into being start rotating with earth/ ans that and your theory according to me is foolproof.

What first things to come into being?

Your father and mother are rotating with the earth, when you grow in your mother you are also rotating. The molecules you are made from have always been rotating with the earth.

It is only when you go back to the origins of earth that this argument is relevant. At which point, frictional forces come into play and are what set them in motion.

You are arguing that a human life being created is some mystical process and the molecules, particles, atoms etc "pop" into existence at that point and need to be accelerated. This is non-sense. You are made from materials already existing on the planet, moving with the planet.

singh94

Quote by Doc Al

It's not constant. (Have you read this thread from the beginning?)

What do you mean by 'real speed'? Speed is relative.

A speed is not a force. And if you are moving at a constant velocity, the net force on you is zero. (Of course, on earth you'll be centripetally accelerating.)

i know a speed is not a force but to aquire a speed that i didnt posses initially i neeeda force also const velocity doesnt need force but aquiring a velocity which didnt exist before needs one.
By real i mean to a person on earth who can see me. Also while at it........ a person who is in space out of earths atmosphere.

cepheid

Quote by singh94

if the frictional force is constant ...... and the earth's speed be constant, how can we attain equilibrium?
Another doubt............ so we are moving with a speed of 1000miles per hourin west to est direction...... if i start runnning in the east to west direction at 5 miles per hour then what should be my real speed..... 995miles in the west to east direction or what?

There is no absolute notion of what is at rest and what is moving. All motion is relative. Speed is something that depends on the reference frame in which it is measured. In your example above, your velocity relative to the surface of the Earth is 5 mph, westward. Your velocity as measured in an inertial reference frame is 995 mph, eastward. Both statements are equally valid.

Quote by singh94

ido i need to exert a force of 1005 miles per hour because if not then i am running in 2 opposite directions at the same time which is definitely not possible

This statement is nonsense. Force is not measured in miles per hour. Miles per hour is a unit for velocity or speed. I would highly recommend first reading up on some basic physics, and then later moving on to concepts like relative motion, before posting further on this issue.

EDIT: Beaten by a longshot!

JaredJames

Quote by singh94

a person who is in space out of earths atmosphere.

So? Is there a point to this statement?

singh94

Quote by jarednjames

What first things to come into being?

Your father and mother are rotating with the earth, when you grow in your mother you are also rotating. The molecules you are made from have always been rotating with the earth.

It is only when you go back to the origins of earth that this argument is relevant. At which point, frictional forces come into play and are what set them in motion.

You are arguing that a human life being created is some mystical process and the molecules, particles, atoms etc "pop" into existence at that point and need to be accelerated. This is non-sense. You are made from materials already existing on the planet, moving with the planet.

see u r coming back to friction which is all we have been arguing about... so instead of talking about the origin of earth time why not explain the frictional force at this time as it will be more convinient.
im talking about anything hat came into existense dropped on earth from space from outer space anything which was not on earth initially. not about u and me being born so now instead of cutting my statements please answer them.

singh94

Quote by cepheid

There is no absolute notion of what is at rest and what is moving. All motion is relative. Speed is something that depends on the reference frame in which it is measured. In your example above, your velocity relative to the surface of the Earth is 5 mph, westward. Your velocity as measured in an inertial reference frame is 995 mph, eastward. Both statements are equally valid.

This statement is nonsense. Force is not measured in miles per hour. Miles per hour is a unit for velocity or speed. I would highly recommend first reading up on some basic physics, and then later moving on to concepts like relative motion, before posting further on this issue.

EDIT: Beaten by a longshot!

i thought u people would be and mature enough to understand that im just saying that do i need to exert a force which gives me a speed of 1005 miles so that i can run against the direction of the earth.also i know what r the units of force velocity etc. which concern physics thank u very much.

JaredJames

Quote by singh94

see u r coming back to friction which is all we have been arguing about... so instead of talking about the origin of earth time why not explain the frictional force at this time as it will be more convinient.
im talking about anything hat came into existense dropped on earth from space from outer space anything which was not on earth initially.

Read the thread, it's discussed it from the start.

not about u and me being born so now instead of cutting my statements please answer them.

Are you not, perhaps a quote of your earlier post:

Quote by singh94

Yes...... but we come into existence when we are born so we have to be at rest first before we start moving with inertia.

Oh look, I'm not cutting anything up, I'm directly answering what you write.

Doc Al

Quote by singh94

im talking about anything hat came into existense dropped on earth from space from outer space anything which was not on earth initially. not about u and me being born so now instead of cutting my statements please answer them.

Have you already forgotten your earlier post?

Quote by singh94

Yes...... but we come into existence when we are born so we have to be at rest first before we start moving with inertia.

singh94

Quote by jarednjames

So? Is there a point to this statement?

i mean what is my speed relative to a person who is in free space away from all forces and at compele rest.

JaredJames

Quote by singh94

i thought u people would be and mature enough to understand that im just saying that do i need to exert a force which gives me a speed of 1005 miles so that i can run against the direction of the earth.

No, you don't.

If you are already at 1000mph, you only need to exert a force to give you an additional 5mph.

also i know what r the units of force velocity etc. which concern physics thank u very much.

Then show you do, stop posting statements which don't make sense and have incorrect units.

Doc Al

Quote by singh94

i mean what is my speed relative to a person who is in free space away from all forces and at compele rest.

Sorry, but the idea of something being at 'complete rest' is nonsensical. All motion is relative.

And being free from all forces would not define a velocity anyway. It just would mean that the velocity would remain constant (with respect to any inertial frame).

singh94

Quote by doc al

have you already forgotten your earlier post?

i am talking about anything that came on earth when it was being created. Any thing from outer space (meteors aliens gases anything which was just moving in a straight line towards earth due to its inertia or the earths gravitational field.
Now do u get wat i am trying to say?

Doc Al

Quote by singh94

i am talking about anything that came on earth when it was being created. Any thing from outer space (meteors aliens gases anything which was just moving in a straight line towards earth due to its inertia or the earths gravitational field.
Now do u get wat i am trying to say?

No, not at all.

singh94

Quote by Doc Al

Sorry, but the idea of something being at 'complete rest' is nonsensical. All motion is relative.

And being free from all forces would not define a velocity anyway. It just would mean that the velocity would remain constant (with respect to any inertial frame).

I am on earth okay? i move in e-w at 5 miles per hour now wat is my speed for a person whos inertia of state is at rest and wh is not under an external forces?
also answer my other question concerning force for quiring speed of 1005 miles

singh94

[QUOTE=Doc Al;3226931]No, not at all.[/QUOTE
then i give up trying to explain to u. maybe someone else will be able to.

singh94

Quote by singh94

I am on earth okay? i move in e-w at 5 miles per hour now wat is my speed for a person whos inertia of state is at rest and wh is not under an external forces?
also answer my other question concerning force for quiring speed of 1005 miles

r u there Mr.Doc Al?

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singh94	[QUOTE=Doc Al;3226931]No, not at all.[/QUOTE then i give up trying to explain to u. maybe someone else will be able to.