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1.
The ratio of radii of earth to another planet is 
and the ratio of their mean densities is 
If an astronaut can jump to a maximum height of 1.5 m on the earth, with the same effort, the maximum height he can jump on the planet is
and the ratio of their mean densities is If an astronaut can jump to a maximum height of 1.5 m on the earth, with the same effort, the maximum height he can jump on the planet is
2.
There are two planets. The ratio of radius of the two planets is 
but ratio of acceleration due to gravity of both planets is 
. What will be the ratio of their escape velocity
but ratio of acceleration due to gravity of both planets is . What will be the ratio of their escape velocity
3.
The binding energy of a satellite of mass 
in a orbit of radius 
is 
in a orbit of radius is
4.
Two satellites of mass and 
are orbiting a planet in orbit of radius 
. Their periods of revolution will be in the ratio of
and are orbiting a planet in orbit of radius . Their periods of revolution will be in the ratio of
5.
At what depth below the surface of the earth, acceleration due to gravity will be half its value 
above the surface of the earth
will be half its value above the surface of the earth