Question

Johnny has a mass of 68.0 kg and Jane has a mass of 56.0 kg. how far apart are they from each other if they experience a force of gravitation attraction of 8.20 x 10-9

Answer 1

`F=G(m_1 m_2)/(d^2) = 6.674\cdot 10^(-11)N((m)/(kg))^2\cdot(68kg\cdot 56kg)/(d^2)=8.2\cdot10^(-9)N\\d=\sqrt{(122.86)/(3808)}\approx 0.18\,m`

they're about 18 cm away from each other.