The energy required to take a satellite to a height above Earth's surface

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

The energy required to take a satellite to a height

h

above Earth's surface, where Earth's radius is

6.4\times10^3\,\text{km}

, is

E_1

. The kinetic energy required for the satellite to be in a circular orbit at this height is

E_2

. The value of

h

for which

E_1=E_2

is: (1)

1.28\times10^4\,\text{km}

(2)

6.4\times10^3\,\text{km}

(3)

3.2\times10^3\,\text{km}

(4)

1.6\times10^3\,\text{km}