During a rescue mission, a plane drops a crate of emergency supplies while maintaining a constant speed and level flight. The crate makes up 10% the mass of the plane. 90% of the total mass, or the airplane,
continued on level flight, and 10% of the mass was dropped by the plane. Assume that there is no air
friction and no parachutes on the crate. Consider the system to be the plane and crate together.