1.) Why do  different planets have different escape speeds?

2.) From where does a satellite revolving around the planet get the required centripetal force?

3.)Will 1kg of sugar be more at poles or at the equator?

4.)The centripetal force on a satellite revolving around the earth is "F" .What is the gravitational force due to earth on it and what is the net force?

CAN  ANYONE SOLVE THIS QUESTIONS?

1) Escape velocity depends on the mass of planet. The heavier the planet the greater is its graviational pull on the object and more difficult for it to escape. We know that planets are bigger and smaller. So their escape velocities are different.

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2). Satellites get the required centripetal force from gravitational pull by the earth(planet).

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3.) Mass of 1 kg sugar will remain 1 Kg. (unless you eat it). However, the sugar will weight slightly more at the poles because the shape of earth is not perfectly round. it is flattened at poles. At poles radius is slightly smaller than radius at equator. Gravity depends inversely on square of radius. So g will be more at pole, hence mg (weight) will be more at poles.

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4) We know that centripetal force for revolution of satellite is provided by the gravitational pull of the planet. So graviational force will be "F". And the net force is also F because centripetal force and gravitational force are not two different forces. They are the same and the one.