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An 1865-kg airplane starts at rest on an airport runway at
Chapter 8, Problem 75GP(choose chapter or problem)
Problem 75GP
An 1865-kg airplane starts at rest on an airport runway at sea level. (a) What is the change in mechanical energy of the airplane if it climbs to a cruising altitude of 2420 m and maintains a constant speed of 96.5 m/s? (b) What cruising speed would the plane need at this altitude if its increase in kinetic energy is to be equal to its increase in potential energy?
Questions & Answers
QUESTION:
Problem 75GP
An 1865-kg airplane starts at rest on an airport runway at sea level. (a) What is the change in mechanical energy of the airplane if it climbs to a cruising altitude of 2420 m and maintains a constant speed of 96.5 m/s? (b) What cruising speed would the plane need at this altitude if its increase in kinetic energy is to be equal to its increase in potential energy?
ANSWER:
Step 1 of 7
Part (a)
Consider a plane of mass m initially at rest on the runway which is at sea level. It starts climbing to an altitude with a constant speed. We are going to find the change in mechanical energy of the plane.
The mass of the airplane m = 1865 kg
The acceleration due to gravity
The final speed of the 96.5 m/s
The altitude of the plane y = 2420 m
The initial height 
The initial speed
