The magnitude of the force of gravity acting between the particles is:
![F=G\frac{m_1.m_2}{d^2}](/tpl/images/0169/8326/71544.png)
ย
The weight of each particle is:
![P=mg](/tpl/images/0169/8326/e582b.png)
Now let's plug in the numbers knowing that
![G=6.67\times10^{-11}](/tpl/images/0169/8326/1556f.png)
,
![g=9.81](/tpl/images/0169/8326/71a5c.png)
,
![d=0.8](/tpl/images/0169/8326/a8a62.png)
and m1 and m2 are already given in kilograms. We get then:
![P_1=m_1.g=78.48](/tpl/images/0169/8326/deb84.png)
N
![P_2=m_2.g=117.72](/tpl/images/0169/8326/646d7.png)
N
![F=G\frac{m_1.m_2}{d^2}=1.00\times10^{-8}](/tpl/images/0169/8326/f3b98.png)
N
This results shows us why we don't often see objects being attracted to each other, their mass is too small compared to the earth gravitational pull.