An airplane is flying at 400 mph, and encounters a wind blowing across the plane (from right to left), at a speed of 35 mph. The plane's speed relative to the ground will:
A)Decrease.
B)Stay the same.
C)Increase.
D)Decelerate.
E)Decrease by a factor of 1.35.

Question

Quizplus · Accepted Answer

Although the wind is blowing a right angle to the plane's direction, it will still increase the groundspeed of the plane. The new vector of the plane will be ?4002 + 352, and its groundspeed will be 401.5 mph.

An Airplane Is Flying at 400 Mph, and Encounters a Wind