Vector Addition: Calculating Bird's Speed in Southerly Direction

[cixelsyD]

A bird can manage 50 KmHr-1 in still air. There is a wind blowing eastward at 30kmhr-1, the bird wishes to travel south. The resultant speed the bird carries in the southerly direction is?



For equations i just used vector addition, and pythagorous (A²+B²=C²)



The first time i thought about this problem, i assumed the speed stayed the same, and the bird just got blown of coarse this is in correct though. So i did vector addition, which is obviously wrong as I had to include the southern speed (50kmHr-1).

 

[sylas]

Vector addition is correct. What vectors are involved, though? One is the air velocity. What other vectors?

Cheers -- sylas

 

[Gorn]

Hello..

For some reason I come up with 20km/hr.

Bye.