Question

Object shown in the following diagram can be considered as __________

(a) statically stable

(b) statically unstable

(c) stability can’t be guessed from diagram

(d) neutrally stable

This question was addressed to me by my school principal while I was bunking the class.

This question is from Longitudinal Static Stability and Control-1 in portion Stability, Control, and Handling Qualities of Aircraft Design

Answer 1

The correct option is (a) statically stable

For explanation I would say: A typical illustration of stability criteria is shown in the diagram. As shown in the figure, if ball is disturbed from equilibrium position it will return to its original equilibrium position. It has an initial tendency to return to the equilibrium position. Hence, the above diagram is illustrating the concept of statically stable object.