# coriolis effect : its implication

• May 16th, 2013, 08:27 PM
xxx200
coriolis effect : its implication
guys this thread is only for genuine inquiry and not for any debate.

Coriolis effect says: In the inertial frame of reference, an object moves in a straight line. However, the observer who is standing in the rotating/non-inertial frame of reference, sees the object as following a curved path due to the Coriolis and centrifugal forces present in this frame.

now lets apply the rule into our skyline at horizon.

rotating frame = earth

object = skyline at horizon

observer = us

because of earth's rotation we see our skyline at horizon curved which actually is a straight line. is it true?
• May 16th, 2013, 11:17 PM
Lynx_Fox
Quote:

an object moves in a straight line.

Operative word is moves.
• May 17th, 2013, 03:15 AM
Strange
Quote:

Originally Posted by xxx200
Coriolis effect says: In the inertial frame of reference, an object moves in a straight line.
...
object = skyline at horizon

This is not an object and it isn't moving.

Quote:

because of earth's rotation we see our skyline at horizon curved which actually is a straight line. is it true?
The horizon is curved because we are on a sphere. (This curvature is barely visible at sea level, though.)
• May 17th, 2013, 10:00 AM
xxx200
but would it mean that due to coriolis effect, all moving objects whom we see moving in curvature actually move in straight line ?
• May 17th, 2013, 10:06 AM
Strange
Quote:

Originally Posted by xxx200
but would it mean that due to coriolis effect, all moving objects whom we see moving in curvature actually move in straight line ?

Not necessarily. (I don't know if your description of the Coriolis effect is accurate or not, but this is purely a problem of logic.)

If something actually moving in a straight line is seen to move in a curve DOES NOT imply that all things seen to be moving in a curve must actually be moving in a straight line.

For example, if something is actually moving in a curve then it will be perceived to be moving in a curve.

To put it more formally:

IF A THEN B is not the same as IF B THEN A
• May 20th, 2013, 03:01 PM
Smashingdols
Quote:

Originally Posted by xxx200
but would it mean that due to coriolis effect, all moving objects whom we see moving in curvature actually move in straight line ?

The "skyline" is still technically the Earth, so the observer and the skyline are within the same reference frame so we do not observe a corriolis effect (as someone else said, we see a curvature because the Earth is curved).
• May 20th, 2013, 03:44 PM
fiveworlds
Ιf I take the motorway to anywhere I follow what appears to me as a straight line this is my inertial frame of reference.However if an observer looked at the car on the motorway in the rotating frame of reference not in the car they would see it follow a curve.Therefore the object follow an apparently different path relative to each observer. Now why would this be a problem if I looked at lightning in two different reference frames I would find differing results for how far away the lighting is how do I know how far away the lightning really was?