Which of following statements are true about acceleration due to gravity? (a), 'g' decr

English

Gujarati

Hindi

7.Gravitation

medium

Which of the following statements are true about acceleration due to gravity?
$(a)\, 'g'$ decreases in moving away from the centre if $r > R$
$(b)\, 'g'$ decreases in moving away from the centre if $r < R$
$(c)\, 'g'$ is zero at the centre of earth
$(d)\, 'g'$ decreases if earth stops rotating on its axis

A

$(a)$ and $(b)$

B

$(a)$ and $(c)$

C

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

D

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

Solution

Variation of $g$ with distance

variation of $g$ with $\omega : \mathrm{g}^{\prime}=\mathrm{g}-\omega^{2} \mathrm{R} \cos ^{2} \lambda$

If $\omega=0$ then $g$ will not change at poles where $\cos \lambda=0$

Standard 11

Physics

Share

Similar Questions

The acceleration due to gravity at a height $1\, km$ above the earth is the same as at a depth $d$ below the surface of earth. Then $d\,=$ ……… $km$

medium

(NEET-2017)

Which of the following symptoms is likely to afflict an astronaut in space $(a)$ swollen feet, $(b)$ swollen face, $(c)$ headache, $(d)$ orientational problem.

medium

Two masses $m_1$ and $m_2\, (m_1 < m_2)$ are released from rest from a finite distance. They start under their mutual gravitational attraction

medium

(AIIMS-2012)

A body weights $49\,N$ on a spring balance at the north pole. ….. $N$ will be its weight recorded on the same weighing machine, if it is shifted to the equator?

(Use $g=\frac{G M}{R^{2}}=9.8 \,ms ^{-2}$ and radius of earth, $R =6400\, km .]$

medium

(JEE MAIN-2021)

If the mass of earth is $80$ times of that of a planet and diameter is double that of planet and $‘g’$ on earth is $9.8\,m/{s^2}$, then the value of $‘g’ $ on that planet is …….. $m/{s^2}$

medium