Question

Show by calculation why acceleration due to gravity at the centre of the earth is zero.
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Answer 1

Explanation:

The value of acceleration due to gravity decreases as we move closer and closer to the centre of earth.

The formula is given by g' = g(1 - D/R) where D is the depth and R is the radius of the earth.

At the centre of the earth, the value of D is R.

So, g' = g(1-R/R) = g(1-1) = 0.

You will learn this derivation in class 11.