Question

Explain why a Rolly Polly doll always stand erect.

Answer 1

Explanation

1. Rolly Polly doll always stand erect because its base is large and the height of the centre of gravity of the doll from the base is less.
2. When centre of gravity of a body is low, then the stability of body increases.
3. Rolly Polly doll is an example of stable equilibrium.
4. Hence, the doll stands erect and retains its position, even after an external force acts on it.