# Answer on Mechanics | Relativity Question for Christbeauty

Question #58101

19 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth

gR2(R+h)2

gR(R+h)

g(R−h)R

g(R−h)2R2

20 A 2000 kg satellite orbits the earth at a height of 300 km. What is the speed of the satellite and its period? Take

G=6.67×10−11Nm2/kg2

, Mass of the earth is

5.98×1024

kg

7.73 km/s and

5.4×103

s

855.4km/s and

7.7×104

s

497.2km/s and

5.5×105

s

322.3km/s and

4.3×104

s

gR2(R+h)2

gR(R+h)

g(R−h)R

g(R−h)2R2

20 A 2000 kg satellite orbits the earth at a height of 300 km. What is the speed of the satellite and its period? Take

G=6.67×10−11Nm2/kg2

, Mass of the earth is

5.98×1024

kg

7.73 km/s and

5.4×103

s

855.4km/s and

7.7×104

s

497.2km/s and

5.5×105

s

322.3km/s and

4.3×104

s

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