Question

A hole is drilled through the earth along a diameter and a stone is dropped into it. When the stone is at the centre of the earth, it has finite $a\left)weightb\right)accelerationc)P.E.d)mass$

• A. a,b & d
• B. a,b & c
• C. a, b, c,d
• D. a,c & d

Answer 1

The correct option is C a, b, c,d

At center, acceleration due to gravity, is zero, so weight is zero. Also, the Potential energy is zero. Mass is constant so it is finite.

Thus all a, b, c, d are finite.