What is the mass of the earth?

The weight of a rock on the moon is 200.6 N. What is its mass on the earth?

Calculate the mass of the earth. Given radius of the earth =6.4xx10^-6 m and g = 9.8 m//s^2

Mass of an object is 10 kg. What is the weight on the earth (g = 9.8 ms^-2) ?

What is the cause of earth's magnetism?

A body weighs 63 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth ?

At what altitude in metre will the acceleration due to gravity be 25% of that at the earth's surface? (R is the radius of the earth)

If a planet existed whose mass and radius were both half of that of the eawrth. What would be the acceleration due to gravity at the surface of the planet in terms of that on the surface of the earth?