The mass of a planet is 6 × 1024 kg and its diameter is 12.8 ×103 km. If the value of gravitational constant be 6.7×10-11 Nm2/kg2, calculate the value of acceleration due to gravity on the surface of the planet. What planet could this be?

Acceleration due to gravity, g = G * M/ R2

Mass of the planet, M = 6 * 1024 kg


Diameter = 12.8 * 103 km = 12.8 * 106 m


Radius, R = (12.8 * 106)/2 = 6.4 * 106 m


Gravitational constant, G = 6.67 * 1011 Nm2 kg-2


g = 6.67 * 1011 * 6 * 1024/ (6.4 * 106)2


g =


g = 9.8 m/s2


As the value of g = 9.8 m/s2, the planet could be earth.


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