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Priyesh (1601)

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the time period will become root(2) times the time period on the earth i.e 1.414 sec
g=GM/R^2
g'(on planet)= G2M/(2R)^2
therefore g' = g/2
therefore since Timeperiod on earth = 2piroot(l/g)=1sec
time period on the planet 2piroot(l/g')=2piroot(2l/g)=root(2) * time period on earth
 

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