What is the weight of an astronaut while going up in a rocket with an acceleration 6 g if he actually weighs 75 kg, when stationary on the surface of the earth ? What is his apparent weight if the rocket falls down freely towards the earth ?

A body weighs one Newton at the surface of the earth. What will be it’s weight at a height equal to half the radius of the earth ?

A man weight 60 kg-wt at the earth's surface The radius of the earth is 6400 km. At what height above the earth's surface, his weight becomes 30 kg wt ?

If a person goes (i) to a height equal to radius earth and below its surface what would be his weight in the two cases relative to earth ?

A spherical conductor having a charge of 100 muC is brought near another metallic sphere (of mass 36 kg) resting on earth's surface. What minimum distance of separation should be maintained, so as to lift up the metallic sphere with uniform speed. What happens, if the separation is more or less than the calculated value. (Take g =10 ms ^(-2 ) ) .

An apple of mass 250 gm falls from a tree. What is the approximate value of the acceleration of the earth towards the apple [G=6.67xx10^-11Nm^2//kg^2&R=6400km]