Given mass of earth =6.4×1024 kg , radius of earth = 6.4×106 m. Calculate the force of attraction experienced by a man of mass 50 kg.
Force of gravitation is given by the expression,
F=Gm1×m2r2
Here, mass of earth, m1 = 6×1024 kg; mass of man, m2 = 50 kg
The distance between them is to be taken equal to the radius of the earth, r = 6.4×106 m
Substituting these values, we get
F=6.67×10−11×6×1024×50(6.4×106)2 = 488.5 N