Mass of the moon is 1/80 of that of earth and its radius is 1/4 of that of earth.What will be the g on surface of moon as compared with surface of earth?
gearth = GMearth/R2earth
gmoon = GMmoon/R2moon = G(Mearth/80)/(Rearth/4)2 = {GMearth/R2earth}*16/80 = gearth * (1/5)
The above working is correct.
Experimentally, this value has been found to be around 1/6 times g on earth.
Experimentally, this value has been found to be around 1/6 times g on earth.