What the force between two spheres weighing 20 kg each and placed 50cmapart
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F=(g*m1*m2)/r^2
g= 6.67 x 10 ^-11
m1=m2=20kg
r=50cm=0.5m
therefore,f=( (6.67 x 10 -11)*20*20)/(0.5)^2
f=1.0672*(10^-7)N
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