If a tunnel is dug along the diameter of earth and a piece of stone is dropped into it, then the stone will

If a hole is bored along the diameter of the earth and a stone is dropped into hole

If hole is bored along the diameter of the earth and a stone is dropped into the hole then the stone

If a tunnel is dug along the diameter of the earth and a ball is dropped into the tunnel, it will have

If a tunnel is dig along the diameter of earth and a body is dropped freely in it. The motion of this body is……….., if there is no frictional force of medium acting on it. (Fill in the blank).

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

A tunnel is dug along a diameter of the planet. A particle is dropped into it at the surface. The particle reaches the centre of the planet with speed v. If v_(e) is the escape velocity from the surface fo the planet, then-

The escape velocity for a planet is v_(e) . A tunnel is dug along a diameter of the planet and a small body is dropped into it at the surface. When the body reaches the centre of the planet, its speed will be