1.

A body weighs 72 N on surface of the earth. When itis taken to a height of h 2R, where R is radius ofearth, it would weigh(1) 36 N(3) 9 N1.(2) 18 N(4) 8 N

Answer»

value of g at h = 2R = g'= g*h²/(h+R)²= g*4R²/(9R²) = 4g/9

so, weight would be 72/g*4g/9 = 36N



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