Question

contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. helpppppp i dont understand.

Answer 1

force of gravitation between two different masses is given by

`F = (Gm_1m_2)/(r^2)`

here in first case we will have

`F_1 = (G(1kg)(2kg))/((1m)^2)`

`F_1 = 2G`Newton

another case we have

`F_2 = (G(1kg)(2kg))/((2m)^2)`

`F_2 = (G)/(2)`Newton

another case we have

`F_3 =(G(2kg)(2kg))/((1m)^2)`

`F_3 = 4G`Newton

so the force will be maximum in last case when two 2 kg mass is placed at 1 m distance and minimum force is in second case when 1kg and 2kg mass is placed at 2 m distance