What does "respect to the ground" mean in Physics Vectors?

Question

I'm trying to solve a vector problem: A plane whose airspeed is 200 km/h heads due north. But a 100 km/h northeast wind coming from the northeast suddenly begins to blow. What is the resulting velocity of the plane with respect to the ground?

Now, I want to know what "respect to the ground means"...I would be able to solve it if it was "respect to the airplane or wind" but I don't think I've ever heard of "respect to the ground"...

Answer 1

It means the planes velocity relative to the ground.
The plane will still be traveling at 200km/h relative to the air, but the air is moving relative to the ground, so you have to figure out the actual speed of the plane, relative to the ground.

Answer 2

The planes speed with respect to the wind is 200 km/h. The wind's speed with respect to the ground is 100 km/h but in a different direction. You need to find the plane's speed with respect to the ground - the only thing in this problem that isn't moving.

Answer 3

It simply means the speed and direction the plane is traveling over the ground. The northeast wind is also "with respect to the ground" even though it isn't mentioned.

The vector equation in use here is GS = AS + WS.

In your case, the NE wind vector is actually pointed SW and its tail is placed on the head of the 200 mph AS vector. The GS vector is then drawn from the tail of the AS vector to the head of the WS vector. The GS will come out less than 200 and leaning west of the northerly heading

Answer 4

Interesting cherry picking of ideas, both Nietzsche and Jung wrote many volumes of words... Everything exists 'just in your head' But physics is a set of logical and connected thought, whereas Gods are imagined entities given independent existence and allowed to control and dominate the sufferer. The devil [God] made me do it, might be amusing, but it is at the root of some very serious and perverted crimes. Edit: @ Asker: I have some sympathy with the expression that if God/Gods did not exist it would be necessary to invent the concept. And in that sense it could be considered a anthropomorphic construct, especially as man can be considered to be embedded in nature. Religion in that sense is a return to Eden, a pastoral paradise. But that is different to the cult of personality that is built up around God. Look at how intellectualized the arguments for the existence of God intrudes into the well established tenets of Micro biology, with its Creationism and ID, if it was a matter of simple faith then ok, but aspects of it seek to extend well and truly into a formalized epistemological system. Nietzsche was dead in 1900 long before any such thing as Nazis.

Answer 5

Hi,

Hope You and Family are fine.



AIRSPEED/GROUND SPEED
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Airspeed is the velocity of a vehicle through the atmosphere. Groundspeed is the velocity of a vehicle measured with respect to the ground.

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The plane moves at a certain speed with respect to the air. And if the air is moving at some speed with respect to the ground, then the speed of the plane with respect to the ground is V_{plane/ground} = V_{plane/air} + V_{air/ground}.

If the air moves in the same direction as the plane, the two speeds add; if the air moves against the plane, the speeds subtract.



Hope this can help.

Take care,

Warm Regards,

Tanvir.

Answer 6

In relation to the ground. If you consider the ground, what is the airplane's velocity. It's something like that. Good luck! I hope you get an A!!!

Answer 7

'with respect to the ground' is the phrase you want defined. compared to the ground means the same thing. Velocity is measured from some reference point. In this case the ground is the reference point.