A body starts from rest from a point distant `r_(0)` from the centre of the earth. It reaches the surface of the earth whose radius is `R`. The velocity acquired by the body is

A body is released from a point of distance R' from the centre of earth. Its velocity at the time of striking the earth will be (R’gtR_(e))

The escape velocity from the surface of the earth of radius R and density rho

A body at rest starts from a point at a distance r (gtR) from the centre of the Earth. If M and R stand for the speed of the body when it reaches the Earth surface is

The escape velocity of a body from the surface of the earth is equal to

A tunnel is dug across the earth of mass 'M' and radius 'R' at a distance R//2 from the centre 'O' of the Earth as shown. A body is released from rest from one end of the smooth tunnel. The velocity acquired by the body when it reaches the centre 'C' of the tunnel is

The acceleration due to gravity is g at a point distant r from the centre of earth of radius R . If r lt R , then

The escape velocity from the surface of the earth is (where R_(E) is the radius of the earth )

The escape velocity of a body from the surface of earth is

The satellite is moving round the earth (radius of earth = R) at a distance r from the centre of the earth. If g is the acceleration due to gravity on the surface of the earth. The acceleration of the satellite will be