Asked by Sam

Bird flies 80m east, then 60m south, then straight up
In to sky for 30m.
A)at this point how far is bird from his nest?

Answers

Answered by Reiny
You should have a 3D diagram.
let the distance on the ground be x
x^2 = 80^2 + 60^2

let the distance from start to finish be y
y^2 = x^2 + 30^2
= 80^2 + 60^2 + 30^2
10900
y = √10900 = 104.4 m

or, using vectors
distance vector
= (0,80,0) + (60,0,0) + (0,0,30)
= )60,80,30)
magnitude = √(80^2 + 60^2 + 30^2)
= as before
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