Relativity Question

  • #1

Homework Statement


An airplane has a velocity relative to the air of 189 m/s in a westerly direction. If the wind has a speed relative to the ground of 50 m/s directed to the north, what is the speed of the plane relative to the ground?


Homework Equations


I'm not entirely sure..


The Attempt at a Solution


I figured speed of plane relative to the ground = speed of plane relative to the air + speed of air relative to ground.
So I put in x=189+50
Our homeworks are put online, and I already found out this answer was wrong.

If anyone could help that'd be great! thanks!
 

Answers and Replies

  • #2
17
0
I would just add them vectorially, were the plane's velocity relative to the ground.. I'm not sure what they mean exactly by relative to the air, considering the vectors are perpendicular.
 

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