Question

Which of the following statements are true about acceleration due to gravity?
Which of the following
(A) 'g' decreases in moving away from the centre of earth if r>R
(B) 'g' decreases in moving away from the centre of earth if r<R
(C) 'g' is zero at the centre of earth
(D) 'g' decreases if earth stops rotating on its axis​

Answer 1

Answer-:

Option (A) and (C) is correct

Explanation:

Variation of g with distance

If r > R

Then-:

$g \propto \: \frac{1}{ {r}^{2} }$

So option (A) is correct

If r < R then

$g \propto \: r$

So option (B) is incorrect & (C) is correct

Now, variation of g with ω

ω : g' = g - ω²Rcos²λ

If ω = 0

Then-:

g will not change at poles

where-:

cosλ = 0. While at other points g increases

So option (D) is incorrect

Answer 2

Explanation:

Which of the following statements are true about acceleration due to gravity?

Which of the following

(A) 'g' decreases in moving away from the centre of earth if r>R✔️✔️✔️✔️✔️

(B) 'g' decreases in moving away from the centre of earth if r<R

(C) 'g' is zero at the centre of earth✔️✔️✔️✔️

(D) 'g' decreases if earth stops rotating on its axis