3 particles each of mass 100gm on vertices of triangle of side-20cm,workdone in increasing side 40cm
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Work done= Final gravitational potential -Initial gravitational potential
=vf−vi=3[(−Gmmrf)−(−Gmmri)]=vf−vi=3[(−Gmmrf)−(−Gmmri)]
m=0.1rf=0.4mri=0.2mm=0.1rf=0.4mri=0.2m
Substituting these values we get
W=3[−Gmm(1.4−1.2)]W=3[−Gmm(1.4−1.2)]
W=5.0×10−12JW=5.0×10−12J
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