Question

Assertion : At the centre of earth a body has centre of mass, but no centre of gravity.
Reason : This is because $g = 0$ at the centre of earth.

• A. If both the assertion and reason are true and reason explains the assertion.
• B. If both the assertion and reason are true but reason does not explain the assertion.
• C. If assertion is true but reason is false.
• D. If assertion is false but reason is true.

Answer 1

Answer: (A)

At the centre of earth, $g=0$
$\therefore $ A body has no weight at the centre of earth. and hence no certre of gravity But centre of mass of a body is not related to gravity. So. centre of mass exist