Many people mistakenly believe that the astronauts that orbit the earth are above gravity. Calculate ( g ) for the space shuttle territory, 200 km above Earth's surface.
a) ( g = {GM}/{(R + 200)²} )
b) ( g = {GM}/{(R - 200)²} )
c) ( g = {GM}/{(R + 200)²} - {GM}/{R²} )
d) ( g = {GM}/{R²} - {GM}/{(R + 200)²} )