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 velocity 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.

Question

Quizplus · Accepted Answer

The velocity of the airplane remains the same at 150 m/s after dropping the water because there are no external horizontal forces acting on it, and momentum is conserved in the horizontal direction.

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