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October 21, 2014

October 21, 2014

Posted by **Anonymous** on Saturday, October 31, 2009 at 3:31pm.

i'm thinking you multiply the satelite's mass by 9.8 (N/kg) then what?

- physics -
**MathMate**, Sunday, November 1, 2009 at 11:22amAt 57 km above the earth, the acceleration due to gravity is no longer 9.8 m/s².

The force between the satellite and the earth is governed by Newton's law of gravitation, GMm/r², which says that the force of gravitational attraction is proportional to the product of the masses, and inversely proportional to the square of the distance between them. For the distance r, it is important that you calculate the distance from the centre of each object, as suggested in the question.

Here's a site that will help you understand the law. Feel free to do some calculations and post your result for verification.

http://en.wikipedia.org/wiki/Newton%27s_law_of_universal_gravitation

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