Question

A hollow cone is kept upright on a table. When sand is slowly poured in it, the centre of gravity of the cone-sand system will ______.

Options

• always rise continuously.

• always fall continuously.

• first falls and then rises.

• remain fixed at the same point.

Answer 1

A hollow cone is kept upright on a table. When sand is slowly poured in it, the centre of gravity of the cone-sand system will first falls and then rises.

Explanation:

When sand is slowly poured into an upright hollow cone, the centre of gravity of the cone-sand system initially falls because sand collects at the bottom. As more sand is added, its level rises, causing the centre of gravity to move upwards. Thus, the centre of gravity first falls and then rises.