The escape velocity for a planet is upsilon_e.A tunnel is dug along a diameter of the planet and a small body is dropped into it at the surface. If R is the radius of the planet and g is the acceleration due to gravity at its surface then the body will reach the centre of the planet in time

The escape velocity for a planet is upsilon_e.A tunnel is dug along a

1.	The escape velocity for a planet is upsilon_e.A tunnel is dug along a diameter of the planet and a small body is dropped into it at the surface. If R is the radius of the planet and g is the acceleration due to gravity at its surface then the body will reach the centre of the planet in time
Answer» `2pisqrt(R//g)` `pisqrt(R//g)` `pi/2sqrt(R//g)` `SQRT(2R//g)` ANSWER :C