Question

The weight of an object at the centre of the earth of radius R is

Options

• zero

• infinite

• R times the weight at the surface of the earth

• `1//"R"^2` times the weight at surface of the earth

Answer 1

zero

Explanation:

Acceleration due to gravity (g) is zero at the centre of the earth. Therefore the weight of an object at the centre of earth = mg = m × 0 = 0.