An Airplane Has a Mass of 8,000 Kg and Is

Multiple Choice

An airplane has a mass of 8,000 kg and is flying at 150 m/s in level flight. The airplane drops 1,000 kg of water on a fire below. The speed of the airplane after dropping the water is

A) 50 m/s.
B) 60 m/s.
C) 75 m/s.
D) 100 m/s.
E) 150 m/s.