Posted by Anonymous on Saturday, October 31, 2009 at 3:31pm.
3) A satellite is orbiting Earth at a distance of 57 kilometers. The satellite has a mass of 96 kilograms. What is the force between the planet and the satellite? (Hint: Don't forget that the distance between them in the equation represents the distance to the center of the earth, you might have to do a bit of Googling to determine the radius of the earth as well as the mass of the earth).
i'm thinking you multiply the satelite's mass by 9.8 (N/kg) then what?

physics  MathMate, Sunday, November 1, 2009 at 11:22am
At 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
Answer This Question
Related Questions
 physics  Two satellites are orbiting the Earth in stable circular orbits. ...
 physics  A satellite orbits a planet at a distance of 3.80 108 m. Assume that ...
 Physics Honors  Consider planet mass of 4.98 E 21 kilograms with a satellite ...
 SCTD  Physics a satellite orbiting 3.22 times 10 to the 5th power meters above ...
 PHYSICS  HELP. I need to understand this for a test tomorrow. THANKS Consider ...
 PHYSICS HELP  A satellite of mass m is orbiting the earth, mass M , in a ...
 Physics Classical Mechanics  A satellite of mass m is orbiting the earth, mass ...
 Physics  A satellite orbits the earth at a distance of 10,000 miles from the ...
 Physics  You observe an arti cial satellite orbiting the earth and estimate it ...
 physics  How much work is required to lift a 600kg satellite to an altitude of...
More Related Questions