Which of the following statements are true ab | vedclass

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(B) The variation of acceleration due to gravity $(g)$ is given by:$1$. For $r > R$ (outside the Earth): $g = \frac{GM}{r^2}$. Thus,$g$ decreases as $

Vedclass · Accepted Answer

$(a), (b)$ and $(c)$

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(B) The variation of acceleration due to gravity $(g)$ is given by:$1$. For $r > R$ (outside the Earth): $g = \frac{GM}{r^2}$. Thus,$g$ decreases as $r$ increases.$2$. For $r $3$. At the centre of the Earth $(r = 0)$: $g = 0$.$4$. Effect of rotation: The effective gravity is $g' = g - \omega^2 R \cos^2 \lambda$. If the Earth stops rotating $(\omega = 0)$,then $g' = g$. Since $g$ was previously $g - \omega^2 R \cos^2 \lambda$,the value of $g$ increases (except at the poles where $\cos \lambda = 0$). Therefore,statement $(d)$ is false.Thus,statements $(a), (b),$ and $(c)$ are true.

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