Question

An airplane is flying at a velocity of 79 m/s eastward relative to the air. Due to a high-pressure region to the north, the velocity of the air relative to the ground is 18 m/s southward. Find the ground speed of the airplane.

_________ m/s

Answer 1

81.02m/s toward the southeast

Step-by-step explanation:

use Pythagorean theorem

c^2=a^2+b^2

create a coordinate system, 79m/s toward the east and 18m/s toward the south.

root(79^2+18^2)=81.02