Two balls are dropped from heights `h` and `2h` respectively from the earth surface. The ratio of time of these balls to reach the earth is.

Two balls are dropped from heights h and 2h respectively. The ratio of time taken by these balls to reach the earth is

A ball A of mass m falls on the surface of the earth from infinity. Another ball B of mass 2m falls on the earth from the height equal to six times the radius of the earth. Then ratio of velocities of A and B on reaching the earth is sqrt(x//y) where x and y are coprimes. Find x+y .

A ball A of mass m falls on the surface of the earth from infinity. Another ball B of mass 2m falls on the earth from the height equal to six times the radius of the earth. Then ratio of velocities of A and B on reaching the earth is sqrt(x//y) where x and y are coprimes. Find x+y .

A wooden ball and an iron ball are dropped from the same height h in vaccum. If their radii are the same then the time taken by then to reach the ground are

A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground is

A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground is

A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground is

A ball is dropped from a spacecraft revolving around the earth at a height of 120 km what will happen to the ball ?