an airplane, flying in the direction of 40degree east of north at 475 mph in still air, encounter a 30-mph tail wind acting in the direction 40degree west of north. the airplane maintains its compass heading but, because of the wind, acquires a new ground speed and direction. what are they?
whats the new ground speed?
whats is the new direction angle (thats east of north)?
thank you
http://www.youtube.com/watch?v=eBgLvN10ufA&NR=1