An airplane travels 70 miles per hour. The magnitude of the resultant velocity of the plane is 90 miles per hour, if it encounters a 20 mile per hour headwind.
True
False

True

Explanation:

This is simple subtraction. The force of opposite direction (wind) slows down the plane 20 mph which would result in the plane's velocity to be 70 mph. True is the correct answer.

this is a good question! i'll do some research and come back when i have the answer!