An artificial satellite orbits Earth at a speed of 7800 m/s and a height of 200 km above Earth's surface. The satellite experien
ces an acceleration due to gravity of
A
39 m/s2
B
less than 39 m/s2 but greater than 9.8 m/s2
с
9.8 m/s2
D
less than 9.8 m/s2 but greater than zero
E
zero