Question

The points at where kinetic energy increases dramatically then those points are called _______

(a) Stable equilibrium points

(b) Unstable equilibrium points

(c) Equilibrium points

(d) Unique points

The question was posed to me in an interview for job.

My question is taken from One Dimensional Problems in section One Dimensional Problems of Finite Element Method

Answer 1

The correct answer is (b) Unstable equilibrium points

To explain: If an external force acts to give the particles of the system some small initial velocity and kinetic energy will developed in that body then the point where kinetic energy decreased that point is Stable equilibrium point and the point where the kinetic energy dramatically increased then the point is called  Unstable equilibrium points.