The sputnik one satellite orbiting earth mass equals 5.98×10 to the 24th power kilograms in a circle of radius 6.96×10 to the six power meters what was its orbital velocity

7572 m/s

Explanation:

The force between two masses separated by a distance r is given as:

Where F is the attractive force between 2 masses, m1 and m2, r is the distance between the centres of the masses and G is the universal gravitation constant, which is

The mass of the earth () is far greater than the mass of the sputnik (). Therefore . The mass of the sputnik is neglected, therefore:

But F is actually centripetal acceleration, a = v²/r

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