It is desired to place a communication satellite into orbit so that it remains f

Question

It is desired to place a communication satellite into orbit so that it remains fixed above a given spot on the equator of the rotating earth. A) what is the height above the earth of such an orbit B) consider a neutron star with a mass M equal to the mass of sub, 2.99*10^30 kg, and radius R of 12.0 km. What is the free fall acceleration at its surface ?
Solve it and show steps It is desired to place a communication satellite into orbit so that it remains fixed above a given spot on the equator of the rotating earth. A) what is the height above the earth of such an orbit B) consider a neutron star with a mass M equal to the mass of sub, 2.99*10^30 kg, and radius R of 12.0 km. What is the free fall acceleration at its surface ?
Solve it and show steps It is desired to place a communication satellite into orbit so that it remains fixed above a given spot on the equator of the rotating earth. A) what is the height above the earth of such an orbit B) consider a neutron star with a mass M equal to the mass of sub, 2.99*10^30 kg, and radius R of 12.0 km. What is the free fall acceleration at its surface ?
Solve it and show steps

Explanation / Answer

(a) height above the earth of such an orbit = 35,786 km

(b) The free fall accleration, for the neutron star's surface,

a = g = GM/R^2 = 6.67*10^-11* 2.99*10^30 / (12000)^2

a =1.385*10^12

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