a satellite of mass 1000 kg moves in a circular orbit of radius 7000 km round the earth , calculate the total energy required to place the satellite in orbit from earths surface. assuming it is initially at rest.

please answer quickly !!!!!!!!

Mass of the satellite, m = 1000 kg

Radius of orbit, r = 7000 km = 7000000 m

At the orbit, centripetal force = gravitational force

=> mv²/r = GMm/r²

[M is the mass of the earth]

=> mv² = GMm/r

Let the energy provided to launch the satellite from ground be E,

E + Potential energy at the ground = Potential energy at the orbit + kinetic energy at the orbit

=> E - GMm/R = -GMm/r + ½ mv²

=> E = GMm/R - GMm/r + GMm/(2r)

=> E = GMm/R - GMm/(2r)

=> E = GMm(1/R – 1/2r)

=> E = 6.67 × 10^-11 × 5.9 × 10²⁴ ×1000{1/6400000 – 1/(2 × 7000000)}

[M = 5.9 × 10²⁴ kg, R = 6400000 m]

So, E = 3.35 × 10¹⁰ J