Weight of a body at centre of earth is

English

Gujarati

Hindi

7.Gravitation

easy

The weight of a body at the centre of the earth is

A

Zero

B

Infinite

C

Same as on the surface of earth

D

None of the above

Solution

(a) Inside the earth, gravitational force will vary as

$F=\frac{G M \frac{r^{3}}{R^{3}}}{r^{2}}=\frac{G M r}{R^{3}}$

Hence, at $r=0, F=0$

Standard 11

Physics

Share

Similar Questions

In the reported figure of earth, the value of acceleration due to gravity is same at point $A$ and $C$ but it is smaller than that of its value at point $B$ (surface of the earth). The value of OA $: AB$ will be $x : y .$ The value of $x$ is $\ldots \ldots \ldots$

hard

(JEE MAIN-2021)

The height at which the acceleration due to gravity becomes $\frac{g}{9}$ (where $g$ = the acceleration due to gravity on the surface of the earth) in terms of $R$, the radius of the earth, is

medium

(AIEEE-2009)

The time period of a simple pendulum on a freely moving artificial satellite is

easy

The mass of the earth is $81$ times that of the moon and the radius of the earth is $3.5$ times that of the moon. The ratio of the acceleration due to gravity at the surface of the moon to that at the surface of the earth is

medium

Give the value of acceleration due to gravity at height $12\, km$ from the surface of earth.

easy