A planet with a mass of 4.05×1024 kg has a radius of 6.66×106 m.

Question

 Calculate the surface gravity. G is 6.67×10−11 m3s−2kg−1.? 

Answer 1

Mass of the planet M =4.05 × 10²⁴   kg

Universal gravitational constant, G = 6.673× 10^-11  m³ kg^-1 s^-2

Radius of the planet, r = 6.66× 10⁶ m

Calculate the  surface gravity by using the following formula:

g = G M/r ²

 

g =(6.673× 10^-11) (4.05 × 10²⁴)/(6.66× 10⁶)^2

  = 6.09 m/s ²