An airplane moving in calm weather (no
wind) is headed to the west. If there is a wind
of 33 km/h toward the north, find the speed
of the airplane relative to the ground.
The airplane’s speed relative to the air is
117 km/h.
Answer in units of km/h.
027 (part 2 of 2) 10.0 points
What is the direction (as an angle measured
“north of west”) of the speed of the plane with
respect to the ground?
Answer in units of ◦
.
west and north are perpendicular so
speed = sqrt (117^2+33^2) = sqrt ( 13689 + 1089) = 121.6
tan angle N of W = 33/117 so angle = 15.75 deg