Question

A point mass of $10kg$ is placed at the centre of Earth. The weight of the point mass will be

• A. Zero
• B. Infinite
• C. Less than Zero
• D. $10kg$

Answer 1

The correct option is A Zero

Given,

$m=10kg$

At the center of the earth, the effective acceleration due to gravity is zero.

$g^{\prime }=0m/s^2$

Weight of the point mass at the center of the earth will be

$W=m{g}^{\prime }$

$W=10\times 0=0N$

The correct option is A.