A sphere of mass 25 kg attracts another sphere of mass 24kg with a force of 0.1 milligram weight. if distance between the centres of two sphere is 20 cm, what is the value of G ?

Explanation

Here, `m_(1)=25kg, m_(2)=24kg`
`F=0.1` milligram wt. `=10^(-7) kg wt. =9.8xx10^(-7)N`
`d=20cm=(1)/(5)m, G=?`
From `F=(Gm_(1)m_(2))/d^(2), G=(F xx d^(2))/(m_(1)m_(2))=(9.8xx10^(-7)xx((1)/(5))^(2))/(25xx24)=6.53xx10^(-11)Nm^(2)kg^(2)`