A particle is dropped from height `h = 100 m`, from surface of a planet. If in last `1/2` sec of its journey it covers 19 m. Then value of acceleration due to gravity that planet is :

A ball is dropped from the top of a 200 m high tower on a planet. In the last 1/2 s before hitting the ground, it covers a distance of 79 m. Acceleration due to gravity (in ms–2) near the surface on that planet is ______.

A ball is dropped from the top of a 200 m high tower on a planet. In the last 1/2 s before hitting the ground, it covers a distance of 79 m. Acceleration due to gravity (in ms–2) near the surface on that planet is ______.

Two projectiles, one fired from from surface of earth with velocity 10 m//s and other fired from the surface of another planet with initial speed 5 m//s trace idential trajectories. The value of acceleration due to the gravity on the planet is

A planet has twice the values of mass and radius of earth. Acceleration due to gravity on the surface of the planet is :

Two planets of radii r_1 and r_2 are made from the same material. The ratio of the acceleration due to gravities at the surface of the two planets is

An object is dropped is an unknown planet from height 50 m, it reaches the ground is 2 s. The acceleration due to gravity in this unknwon planet is