If a hollow pipe passes across the diameter of earth, then what changes takes place in the velocity and acceleration of a ball dropped in the pipe?

If a hollow pipe passes across the centre of gravity of the Earth, then what changes would take place in the velocity and acceleration of a ball dropped in the pipe ?

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

The diameter of hollow cone is equal to the diameter of a spherical ball. If the ball is placed at the base of the cone, what portion of the ball will be outside the cone –

When a fluid passes through a constricted part of a pipe ,what happens to its velocity and pressure ?

A tunnel is dug across the diameter of earth. A ball is released from the surface of Earth into the tunnel. The velocity of ball when it is at a distance (R )/(2) from centre of earth is (where R = radius of Earth and M = mass of Earth)

A tunnel is dug across the diameter of earth. A ball is released from the surface of Earth into the tunnel. The velocity of ball when it is at a distance (R )/(2) from centre of earth is (where R = radius of Earth and M = mass of Earth)

Two water pipes of diameters 2 cm and 4 cm are connected with the main supply line. The velocity of flow of water in the pipe of 2 cm

Two water pipes of diameters 2 cm and 4 cm are connected with the main supply line. The velocity of flow of water in the pipe of 2 cm

A liquid is flowing through a horizontal pipe of varying cross-section.The velocity of flow is 25 cm/sec at a point where the diameter of the pipe is 5 cm. What will be the velocity of flow at another point where the diameter is 1 cm.