Nigeria shares its longest border with which West African co…

Explanation

Center of gravity is the point where all weight appears to act. For uniform objects, its at the geometric center. For irregular objects, find it by suspension method.

Stability depends on center of gravity height and base size. Lower center of gravity and wider base = more stable. This is why racing cars are low and wide.

An object topples when its center of gravity falls outside its base. Unstable equilibrium: center above narrow base. Stable: center low, wide base.