Hey all
I know only hints are allowed, and Id prefer that to be honest, so could I have some hints please?
question 1-
an aeroplane is flying with a velocity vector -90/20 (that is supposed to be vector notation, so please ignore the / which makes it look like a fraction) ms^1.
Find the speed and direction of travel (as a three figure bearing)
***********
Right, when I draw this as a triangle it comes out wierd,
-90 is backwards along a horizontal plane, and the 20 is upwards on a vertical plane right? Drawing that out makes the triangle wierd and longer than higher (If only I could draw the triangles).
Second question:
A boat heads north and 20kph
A wind is blowing SE with a constant speed of 2ms^1
a) Find the magnitude of the speed of the boat
b) Find the bearing
**************
Again, Im having problems with the triangle, drawing it out makes the 2 ms^1 the hypotenuse when, to find the speed shouldnt be the hypotenuse i.e the hypotenuse has to be found?
Please could anyone give me some helpful pointers
Thankyou very much in advance!
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fishkeeper
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- 07-02-2010 19:50
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ghostwalker
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- 07-02-2010 19:57
For question 1.
OK, it's a "weird" looking triangle, but it sounds like you have it correct. What's the problem you're having with it? -
fishkeeper
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- 07-02-2010 20:03
The only calculation to do is work out the missing side (bottom) but I dont see how that gets the speed its flying at as its equals 87 ms^1?
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ghostwalker
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- 07-02-2010 20:08
(Original post by fishkeeper)
The only calculation to do is work out the missing side (bottom) but I dont see how that gets the speed its flying at as its equals 87 ms^1? -
fishkeeper
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- 07-02-2010 20:10
But that suggests the plane is travelling SW?
Then the bearing would be 270?
I think I may be making this much more confusing than it actually is! -
ghostwalker
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- 07-02-2010 20:19
(Original post by fishkeeper)
But that suggests the plane is travelling SW?
Then the bearing would be 270?
I think I may be making this much more confusing than it actually is!
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