Katie and Mark sit next to one another in class. She has a mass of 40 kg and his mass is 65 kg.
If they are 0.5 meters apart, what is the gravitational force between Mark and Katie?
A :-) for this question , we should apply F = GMm by d^2 ( For making the calculation easy , first remove the decimals ) Given : G = 6.7 x 10^-11 Nm^2 / kg^2 = 67 x 10^-12 Nm^2 / Kg^2 M = 65 kg m = 40 kg d = 0.5 m Solution - F = GMm by d^2 F = 67 x 10^-12 x 65 x 40 by 0.5 x 0.5 F = 4355 x 40 x 10^-12 by 0.25 F = 174200 x 10^-12 by 0.25 F = 696800 x 10^-12
.:. The Gravitational force between mark and Katie is 696800 x 10^-12
