There is no atmosphere on the moon because
It is closer to the earth
It revolves round the earth
It gets light from the sun
The escape velocity of gas molecules is lesser than their root mean square velocity here
Consider two spherical planets of same average density. Second planet is $8$ times as massive as first planet. The ratio of the acceleration due to gravity of the second planet to that of the first planet is
The weight of an astronaut, in an artificial satellite revolving around the earth, is
If the earth rotates faster than its present speed, the weight of an object will
If radius of the earth is $6347\, km ,$ then what will be difference between acceleration of free fall and acceleration due to gravity near the earth's surface ?
A body weighs $250\,N$ on the surface of the earth. ....... $N$ will it weigh half way down to the centre of the earth .