If $M$ is mass of a planet and $R$ is its radius then in order to become black hole [ $c$ is speed of light]
If $M$ is mass of a planet and $R$ is its radius then in order to become black hole [ $c$ is speed of light]
- A
$\sqrt{\frac{G M}{R}} \leq c$
- B
$\sqrt{\frac{G M}{2 R}} \geq c$
- C
$\sqrt{\frac{2 G M}{R}} \geq c$
- D
$\sqrt{\frac{2 G M}{R}} \leq c$
Similar Questions
Radius of the earth is $R$. If a body is taken to a height $3R$ from the surface of the earth than change in potential energy will be
Radius of the earth is $R$. If a body is taken to a height $3R$ from the surface of the earth than change in potential energy will be
If $g$ is the acceleration due to gravity on the earth's surface, the gain in the potential energy of an object of mass $m$ raised from the surface of the earth to a height equal to the radius $R$ of the earth, is
If $g$ is the acceleration due to gravity on the earth's surface, the gain in the potential energy of an object of mass $m$ raised from the surface of the earth to a height equal to the radius $R$ of the earth, is
A body weighs $72\, N$ on the surface of the earth. What is the gravitational force(in $N$) on it, at a helght equal to half the radius of the earth$?$
A body weighs $72\, N$ on the surface of the earth. What is the gravitational force(in $N$) on it, at a helght equal to half the radius of the earth$?$
When a body is taken from pole to the equator its weight
When a body is taken from pole to the equator its weight
When a body is taken from pole to the equator its weight
When a body is taken from pole to the equator its weight