Quote Originally Posted by KDM guy
in the problem, it states that the plane is moving one way while the belt is moving the opposite way at the same exact speed. Think about it. (-)10 + (+)10 = ZERO. the two speeds cancel each other out and the plane goes nowhere.
What you just admitted to is that the wheels spinning means nothing - which is what we want you to see. So, you got your -10 and you +10 - PERFECT!! Plane is going nowhere fast. Now fire up the JET engines to 100% - the plane moves forward yes? And if not - what is stopping it from moving forward.