Velocity notation

BobbyJones

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Joined
Aug 15, 2011
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35
Just a quick question:

Is there any difference between-

Velocity V = 10 ms^-1 Bearing 30 degrees

and

Velocity V =10<30degrees ms^-1


*The < symbol between the 10 and 30 is a polar form angle symbol.
 
Just a quick question:

Is there any difference between-

Velocity V = 10 ms^-1 Bearing 30 degrees

and

Velocity V =10<30degrees ms^-1


*The < symbol between the 10 and 30 is a polar form angle symbol.

Depends on how you have defined bearing.

Also, in the second definition - 30° measured from which axis?
 
Bearing, as in direction

Also, in the second definition - 30° measured from which axis?

I'm guessing the same axis, as I'm not told otherwise. I cant see any difference is their meaning, just the way it's written.
 
That is very ambiguous. Following is a quote from Wiki:

US Army Definition Of Bearing The US Army defines the bearing from Point A to Point B as the angle between: either a north, south, east, or west ray, whose origin is Point A and Ray AB, the ray whose origin is Point A and which contains Point B. The bearing consists of 2 characters and 1 number: first, the character representing the reference ray (N, or S); followed by the angle value; and finally the character representing the direction of the angle from the reference ray (E, or W). The angle value will always be less than 90 degrees.[2][3] For example, if Point B is located exactly southeast of Point A, the bearing from Point A to Point B is S 45° E.[3]
The US Army defines the azimuth between Point A and Point B as the angle, measured in the clockwise direction, between the north reference ray and Ray AB. For example, if the bearing between Point A and Point B is E 45° S, the azimuth between Point A and Point B is 135°.[2][3]
The angle value in a bearing can be specified in the units of degrees, mils, or grad. An azimuth is specified in the same angle units.[4]

You can see from above that your problem is ill-defined.

Also for degrees - you generally assume it will be from x-axis (generally drawn EW direction) and measured in counter-clockwise (CCW) direction.

This is why picture is worth thousand words and sketch of the problem becomes important.
 
There is no picture to show. I see your point, and I also took it as on the x axis, going CCW, but to me the ms^1, which I guess means meater's squared to 0.1.

I think they must be the same.


Velocity V = 10 ms^-1 Bearing 30 degrees

and

Velocity V =10<30degrees ms^-1


In your expertise of mathematical wordplay, can you shed any light on if there is a difference between the two?
 
There is no picture to show. I see your point, and I also took it as on the x axis, going CCW, but to me the ms^1, which I guess means meater's squared to 0.1.

I think they must be the same.


Velocity V = 10 ms^-1 Bearing 30 degrees

and

Velocity V =10<30degrees ms^-1


In your expertise of mathematical wordplay, can you shed any light on if there is a difference between the two?

In a way - there is no difference - because both of those are "incomplete" description of the situation.

By the way, ms^(-1) or ms-1 or m/s, is shorthand for meters/second (not meater's squared to 0.1)
 
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